Driving device for adjusting atmosphere lamp and atmosphere lamp

Abstract

The utility model relates to a driving device for adjusting an atmosphere lamp and the atmosphere lamp, and the driving device comprises a main control module which is used for regulating and outputting three paths of PWM signals; the control module comprises three control circuits; each control circuit is connected with the main control module, and is used for receiving the corresponding PWM signal, controlling the on-off of each control circuit according to the PWM signal, and outputting a control signal under the condition that the corresponding control circuit is conducted; the driving module comprises three paths of driving circuits and is used for receiving the control signal to output a driving signal to a connected LED circuit and driving an LED connected to the LED circuit to emit light; the detection module comprises three detection circuits and is used for detecting load voltage output by the LED circuit; and the main control module is also used for closing the output of the corresponding PWM signal under the condition that the load voltage is greater than a threshold value. The driving device is low in hardware cost, high in load capacity, low in heat emission, low in power consumption and high in circuit safety.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a driving device for adjusting an atmosphere light and an atmosphere light. Background Art

[0002] At present, there are more and more application scenarios for car ambient lights, including door trim panels, central control instrument panels, armrest boxes, starry sky ceilings on the roof, etc.

[0003] There are many different driving solutions for ambient lighting, which are closely related to the product's functions, cost, reliability, safety and other aspects. They must not only meet product functions, reliability and safety, but also control costs. This poses greater challenges to the selection and cost of driving solutions.

[0004] In the related art, dedicated chips are mostly used to drive the atmosphere lights, but the hardware cost is high and the heat is too concentrated; in addition, due to the lack of perfect detection functions, the safety is also poor. Utility Model Content

[0005] Based on this, it is necessary to provide a driving device for adjusting an atmosphere light and an atmosphere light in order to solve the above technical problems.

[0006] In a first aspect, an embodiment of the present application provides a driving device for adjusting an atmosphere lamp, the device comprising:

[0007] The main control module is used to control and output three PWM signals;

[0008] A control module, comprising three control circuits; wherein each of the control circuits is connected to the main control module, and is used to receive a corresponding PWM signal, and control the on and off of each of the control circuits according to the PWM signal, and output a control signal when the corresponding control circuit is turned on;

[0009] A driving module, comprising three driving circuits; wherein one end of each driving circuit is connected to a corresponding control circuit, and the other end of each driving circuit is connected to a corresponding LED circuit, and is used to receive the control signal to output a driving signal to the connected LED circuit, so as to drive the LED connected to the LED circuit to emit light;

[0010] A detection module, comprising three detection circuits, wherein each detection circuit is connected to a corresponding LED circuit, and is used to detect the load voltage output by the LED circuit and feed it back to the main control module;

[0011] The main control module is further configured to receive the load voltage, and when the load voltage is greater than a threshold, turn off the output of the corresponding PWM signal.

[0012] In one embodiment, each of the control circuits includes a resistor R1, a resistor R2, a capacitor C1, and a first switch;

[0013] One end of the resistor R1 is connected to the corresponding PWM signal, the other end of the resistor R1 is connected to one end of the resistor R2, one end of the capacitor C1 and one end of the first switch, and the other end of the resistor R2 and the other end of the capacitor C1 are connected to a common ground.

[0014] In one embodiment, each of the control circuits further includes a diode,

[0015] The anode of the diode is connected to the other end of the resistor R1 and one end of the resistor R2 , and the cathode of the diode is connected to one end of the capacitor C2 and one end of the first switch.

[0016] In one embodiment, each of the driving circuits includes a resistor R3, a resistor R4, a capacitor C2, and a second switch;

[0017] One end of the resistor R3, one end of the capacitor C2, and one end of the second switch are connected to a power supply VCC, the other end of the resistor R3, the other end of the capacitor C2, and the other end of the second switch are connected to one end of the resistor R4, and the other end of the resistor R4 is connected to the other end of the first switch.

[0018] In one embodiment, the first switch is a transistor, the base of the transistor is connected to the cathode of the diode and one end of the capacitor C1, the collector of the transistor is connected to the other end of the resistor R4, and the emitter of the transistor is connected to a common ground.

[0019] In one embodiment, the second switch is a MOS tube, the source of the MOS tube is connected to the power supply VCC and one end of the capacitor C2, the gate of the MOS tube is connected to one end of the resistor R4, and the drain of the MOS tube is connected to the corresponding LED circuit.

[0020] In one embodiment, each of the detection circuits includes a resistor R5, a resistor R6, a resistor R7, and a capacitor C3.

[0021] One end of the resistor R5 is connected to the corresponding LED circuit, the other end of the resistor R5 is connected to one end of the resistor R6 and one end of the resistor R7, the other end of R6 is connected to one end of the capacitor C3, and the other end of the resistor R7 and the other end of the capacitor C3 are connected to a common ground.

[0022] In one embodiment, the device further comprises a filtering module, wherein the filtering module comprises a three-way filtering circuit.

[0023] One end of each of the filter circuits is connected to a corresponding drive circuit, and the other end of each of the filter circuits is connected to a corresponding LED circuit.

[0024] In one embodiment, the control module includes three control circuits, namely a red light control circuit, a green light control circuit, and a blue light control circuit; the drive module includes three drive circuits, namely a red light drive circuit, a green light drive circuit, and a blue light drive circuit.

[0025] The main control module is respectively connected to one end of the red light control circuit, one end of the green light control circuit, and one end of the blue light control circuit, and is used to send a first PWM signal to the red light control circuit, send a second PWM signal to the green light control circuit, and send a third PWM signal to the blue light control circuit;

[0026] The other end of the red light control circuit is connected to one end of the red light drive circuit, and the other end of the red light drive circuit is connected to the LED red light circuit;

[0027] The other end of the green light control circuit is connected to one end of the green light driving circuit, and the other end of the green light driving circuit is connected to the LED green light circuit;

[0028] The other end of the blue light control circuit is connected to one end of the blue light driving circuit, and the other end of the blue light driving circuit is connected to the LED blue light circuit.

[0029] In a second aspect, an embodiment of the present application provides an atmosphere lamp, comprising a driving device for adjusting the atmosphere lamp as described in the first aspect above and three LED circuits, wherein the driving device is connected to each of the LED circuits for controlling the brightness of the LED lamps in each of the LED circuits.

[0030] The above-mentioned driving device and the atmosphere lamp for adjusting the atmosphere lamp, through the main control module to adjust and output three PWM signals; the control module includes three control circuits; wherein each of the control circuits is connected to the main control module, for receiving the corresponding PWM signal, and controlling the on and off of each of the control circuits according to the PWM signal, and outputting the control signal when the corresponding control circuit is turned on; the driving module includes three driving circuits; wherein one end of each of the driving circuits is connected to the corresponding control circuit, and the other end of each of the driving circuits is connected to the corresponding LED circuit, for receiving the control signal to output the driving signal to the connected LED circuit, and driving the LED connected to the LED circuit to emit light; the detection module includes three detection circuits, wherein each of the detection circuits is connected to the corresponding LED circuit, for detecting the load voltage output by the LED circuit and feeding it back to the main control module; the main control module is also used to receive the load voltage, and when the load voltage is greater than the threshold, turn off the output of the corresponding PWM signal. Compared with the existing chip driving scheme, the driving device of the present application has low hardware cost, strong load capacity, less heat generation and low power consumption; in addition, the detection circuit in the driving device of the present application also improves the safety of the circuit.

[0031] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 is a structural block diagram of a driving device for adjusting an atmosphere light in an embodiment;

[0034] Figure 2 is a circuit diagram of a driving device in one embodiment;

[0035] Figure 3 is a structural block diagram of an atmosphere light in an embodiment.

[0036] Among them, 10, main control module; 20, control module; 30, drive module; 40, detection module; 201, control circuit; 202, first switch; 301, drive circuit; 302, second switch; 401, detection circuit; 501, filter circuit; 100, drive device. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0039] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. In this application, when an element is referred to as "provided on" another element, it can be directly provided on the other element or there can also be a centered element. When an element is considered to be "provided on" another element, it can be directly provided on the other element or there can be a centered element at the same time. When an element is considered to be "fixed on" another element, it can be directly fixed on the other element or there can be a centered element at the same time. The terms "first", "second", "third" and the like involved in this application are merely used to distinguish similar objects and do not represent a specific ordering of objects. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] The embodiment of the present application provides a driving device for adjusting an atmosphere light, such as Figure 1 , which is a structural block diagram of a driving device for adjusting an ambient light, includes a main control module 10 , a control module 20 , a driving module 30 and a detection module 40 .

[0041] The main control module 10 is used to control and output three PWM signals; the control module 20 includes three control circuits 201; wherein each of the control circuits 201 is connected to the main control module 10, and is used to receive the corresponding PWM signal, and control the on and off of each of the control circuits 201 according to the PWM signal, and output the control signal when the corresponding control circuit 201 is turned on; the driving module 30 includes three driving circuits 301; wherein one end of each of the driving circuits 301 is connected to the corresponding control circuit 201, and the other end of each of the driving circuits 301 is connected to the corresponding LED circuit, and is used to receive the control signal to output the driving signal to the connected LED circuit, so as to drive the LED connected to the LED circuit to emit light; the detection module 40 includes three detection circuits 401, wherein each of the detection circuits 401 is connected to the corresponding LED circuit, and is used to detect the load voltage output by the LED circuit and feed it back to the main control module 10; the main control module 10 is also used to receive the load voltage, and when the load voltage is greater than the threshold, turn off the output of the corresponding PWM signal.

[0042] Among them, the main control module 10 is used to adjust the duty cycle of each PWM signal, and at a certain frequency, the output effective voltage is controlled by adjusting the duty cycle. After each control circuit 201 receives the corresponding PWM signal, it controls the on and off of the control circuit 201 according to the effective voltage output by the PWM signal. When the control circuit 201 is turned on, it outputs a control signal to the connected drive circuit 301, so that the drive circuit 301 outputs a drive signal to the connected LED circuit to drive the LED connected to the LED circuit to emit light. The three LED circuits are respectively an LED red light circuit, an LED green light circuit, and an LED blue light circuit. By adjusting the duty cycle of each PWM signal, the brightness of the red light in the LED red light circuit, the brightness of the green light in the LED green light circuit, and the brightness of the blue light in the LED blue light circuit can be accurately controlled. By controlling and adjusting the brightness of the three colors of LED lights, red, green, and blue, a variety of colors can be mixed to achieve different atmosphere light effects. Furthermore, the embodiment of the present application also detects the load voltage output by each LED circuit through the detection circuit 401. In the abnormal case where the load voltage exceeds the threshold, the output of the corresponding PWM signal is turned off to turn off the output of the effective voltage, thereby protecting the entire circuit. Compared with the existing chip driving solution, the driving device of the present application has low hardware cost, strong load capacity, less heat generation, and low power consumption; in addition, the detection circuit in the driving device of the present application also improves the safety of the circuit.

[0043] Further, the control module 20 includes three control circuits 201, which are respectively a red light control circuit, a green light control circuit, and a blue light control circuit; the drive module 30 includes three drive circuits 301, which are respectively a red light drive circuit, a green light drive circuit, and a blue light drive circuit. The main control module 10 is respectively connected to one end of the red light control circuit, one end of the green light control circuit, and one end of the blue light control circuit, for sending a first PWM signal to the red light control circuit, a second PWM signal to the green light control circuit, and a third PWM signal to the blue light control circuit; the other end of the red light control circuit is connected to one end of the red light drive circuit, and the other end of the red light drive circuit is connected to the LED red light circuit; the other end of the green light control circuit is connected to one end of the green light drive circuit, and the other end of the green light drive circuit is connected to the LED green light circuit; the other end of the blue light control circuit is connected to one end of the blue light drive circuit, and the other end of the blue light drive circuit is connected to the LED blue light circuit. By regulating the first PWM signal, the third PWM signal and the duty cycle of the third PWM signal through the main control module 10, the brightness of the red light in the LED red light circuit, the brightness of the green light in the LED green light circuit and the brightness of the blue light in the LED blue light circuit are controlled respectively. By controlling and adjusting the brightness of the red, green and blue LED lights, a variety of colors are mixed to achieve different atmosphere lighting effects.

[0044] In one embodiment, see Figure 2 Each of the control circuits 201 includes a resistor R1, a resistor R2, a capacitor C1, and a first switch 202; one end of the resistor R1 is connected to the corresponding PWM signal, the other end of the resistor R1 is connected to one end of the resistor R2, one end of the capacitor C1, and one end of the first switch 202, and the other end of the resistor R2 and the other end of the capacitor C1 are connected to a common ground.

[0045] For further information, please refer to Figure 2 Each of the control circuits 201 further includes a diode D1, wherein the anode of the diode D1 is connected to the other end of the resistor R1 and one end of the resistor R2, and the cathode of the diode D1 is connected to one end of the capacitor C2 and one end of the first switch 202.

[0046] In one embodiment, please continue to see Figure 2Each of the driving circuits 301 includes a resistor R3, a resistor R4, a capacitor C2, and a second switch 302; one end of the resistor R3, one end of the capacitor C2, and one end of the second switch 302 are connected to a power supply VCC, the other end of the resistor R3, the other end of the capacitor C2, and the other end of the second switch 302 are connected to one end of the resistor R4, and the other end of the resistor R4 is connected to the other end of the first switch 302.

[0047] Furthermore, the first switch 202 is a transistor. In a specific embodiment, an NPN transistor is used. The base of the transistor is connected to the cathode of the diode and one end of the capacitor C1, the collector of the transistor is connected to the other end of the resistor R4, and the emitter of the transistor is connected to a common ground.

[0048] Furthermore, the second switch 302 is a MOS tube. In a specific embodiment, a PMOS tube is used. The source of the MOS tube is connected to the power supply VCC and one end of the capacitor C2, the gate of the MOS tube is connected to one end of the resistor R4, and the drain of the MOS tube is connected to the corresponding LED circuit.

[0049] Among them, the input voltage of the power supply VCC is connected to the source of the MOS tube. At the same time, a resistor R3 is added between the source and the gate of the MOS tube to prevent the power supply from short-circuiting when the circuit is turned on. The capacitor C2 is added to give a bias voltage to the gate of the MOS tube.

[0050] In the above driving device, the main control module 10 controls the output effective voltage by adjusting the duty cycle of the PWM signal. After the voltage is divided by the resistors R1 and R2 in the control circuit 201, it is supplied to the base of the transistor through the diode D1. When the voltage of the base of the transistor is greater than the threshold voltage of the base of the transistor, the collector and emitter of the transistor are turned on, and the gate voltage of the MOS tube is pulled down. When the gate voltage of the MOS tube is lower than the threshold voltage, the source and drain of the MOS tube will be turned on, and the LED lamp in the LED circuit will be lit. Among them, the transistor belongs to current control, the MOS tube belongs to voltage control, and the PWM belongs to the signal source. The transistor components are controlled by the PWM signal, and the MOS tube is driven to work to drive the LED lamp to work, making the circuit more stable.

[0051] In one embodiment, please continue to see Figure 2 Each of the detection circuits 401 includes a resistor R5, a resistor R6, a resistor R7, and a capacitor C3, one end of the resistor R5 is connected to the corresponding LED circuit, the other end of the resistor R5 is connected to one end of the resistor R6 and one end of the resistor R7, the other end of R6 is connected to one end of the capacitor C3, and the other end of the resistor R7 and the other end of the capacitor C3 are connected to a common ground.

[0052] In one embodiment, please continue to see Figure 2 The device further includes a filtering module, which includes three filtering circuits 501, one end of each filtering circuit 501 is connected to the corresponding driving circuit 301, and the other end of each filtering circuit 501 is connected to the corresponding LED circuit.

[0053] Among them, the filter circuit 501 includes multiple capacitors connected in parallel, and the LED circuits connected to each filter circuit 501 will be connected to multiple LEDs. Specifically, the LED red light circuit will be connected to multiple LED red lights, the LED green light circuit will be connected to multiple LED green lights, and the LED blue light circuit will be connected to multiple LED blue lights. Therefore, according to the number of LEDs connected to each LED circuit, the capacitor is increased or decreased. If the number of LEDs increases, the number of capacitors connected in parallel is also increased accordingly to increase the capacitance.

[0054] The present application also provides an atmosphere lamp, such as Figure 3 As shown, it includes a driving device for adjusting the atmosphere light as described in the above embodiments and three LED circuits, including an LED red light circuit, an LED green light circuit, and an LED blue light circuit. The driving device is connected to each of the LED circuits to control the brightness of the LED lights in each of the LED circuits.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A driving device for adjusting an atmosphere light, characterized in that: The device comprises: The main control module is used to control and output three PWM signals; A control module, comprising three control circuits; wherein each of the control circuits is connected to the main control module, and is used to receive a corresponding PWM signal, and control the on and off of each of the control circuits according to the PWM signal, and output a control signal when the corresponding control circuit is turned on; A driving module, comprising three driving circuits; wherein one end of each driving circuit is connected to a corresponding control circuit, and the other end of each driving circuit is connected to a corresponding LED circuit, and is used to receive the control signal to output a driving signal to the connected LED circuit, so as to drive the LED connected to the LED circuit to emit light; A detection module, comprising three detection circuits, wherein each detection circuit is connected to a corresponding LED circuit, and is used to detect the load voltage output by the LED circuit and feed it back to the main control module; The main control module is further configured to receive the load voltage, and when the load voltage is greater than a threshold, turn off the output of the corresponding PWM signal.

2. The device according to claim 1, characterized in that Each of the control circuits includes a resistor R1, a resistor R2, a capacitor C1, and a first switch; One end of the resistor R1 is connected to the corresponding PWM signal, the other end of the resistor R1 is connected to one end of the resistor R2, one end of the capacitor C1 and one end of the first switch, and the other end of the resistor R2 and the other end of the capacitor C1 are connected to a common ground.

3. The device according to claim 2, characterized in that Each of the control circuits further comprises a diode, The anode of the diode is connected to the other end of the resistor R1 and one end of the resistor R2 , and the cathode of the diode is connected to one end of the capacitor C2 and one end of the first switch.

4. The device according to claim 2, characterized in that Each of the driving circuits includes a resistor R3, a resistor R4, a capacitor C2, and a second switch; One end of the resistor R3, one end of the capacitor C2, and one end of the second switch are connected to a power supply VCC, the other end of the resistor R3, the other end of the capacitor C2, and the other end of the second switch are connected to one end of the resistor R4, and the other end of the resistor R4 is connected to the other end of the first switch.

5. The device according to claim 3, characterized in that The first switch is a transistor, the base of the transistor is connected to the cathode of the diode and one end of the capacitor C1, the collector of the transistor is connected to the other end of the resistor R4, and the emitter of the transistor is connected to a common ground.

6. The device according to claim 4, characterized in that The second switch is a MOS tube, the source of the MOS tube is connected to the power supply VCC and one end of the capacitor C2, the gate of the MOS tube is connected to one end of the resistor R4, and the drain of the MOS tube is connected to the corresponding LED circuit.

7. The device according to claim 1, characterized in that Each of the detection circuits includes a resistor R5, a resistor R6, a resistor R7, and a capacitor C3. One end of the resistor R5 is connected to the corresponding LED circuit, the other end of the resistor R5 is connected to one end of the resistor R6 and one end of the resistor R7, the other end of R6 is connected to one end of the capacitor C3, and the other end of the resistor R7 and the other end of the capacitor C3 are connected to a common ground.

8. The device according to claim 1, characterized in that The device also includes a filtering module, which includes a three-way filtering circuit. One end of each of the filter circuits is connected to a corresponding drive circuit, and the other end of each of the filter circuits is connected to a corresponding LED circuit.

9. The device according to claim 1, characterized in that The control module includes three control circuits, namely a red light control circuit, a green light control circuit, and a blue light control circuit; the drive module includes three drive circuits, namely a red light drive circuit, a green light drive circuit, and a blue light drive circuit. The main control module is respectively connected to one end of the red light control circuit, one end of the green light control circuit, and one end of the blue light control circuit, and is used to send a first PWM signal to the red light control circuit, send a second PWM signal to the green light control circuit, and send a third PWM signal to the blue light control circuit; The other end of the red light control circuit is connected to one end of the red light drive circuit, and the other end of the red light drive circuit is connected to the LED red light circuit; The other end of the green light control circuit is connected to one end of the green light driving circuit, and the other end of the green light driving circuit is connected to the LED green light circuit; The other end of the blue light control circuit is connected to one end of the blue light driving circuit, and the other end of the blue light driving circuit is connected to the LED blue light circuit.

10. An atmosphere lamp, characterized in that: It comprises a driving device for adjusting the atmosphere light as described in any one of claims 1 to 9 and three LED circuits, wherein the driving device is connected to each of the LED circuits to control the brightness of the LED lights in each of the LED circuits.

Images