Light-emitting driver, light-emitting control module and light-emitting driving control system

Abstract

The utility model discloses a light-emitting driver, a light-emitting control module and a light-emitting driving control system, and relates to the technical field of light-emitting driving. The light-emitting driver comprises an input module, a filtering module, at least one group of multiplexing modules and at least one group of LED modules, wherein the multiplexing modules are in one-to-one correspondence with the LED modules; the output end of the input module is connected with the input end of the filtering module, and the input module is used for receiving an external power supply to supply power to the filtering module; the output end of the filtering module is connected with the input end of the multiplexing module, and the filtering module is used for filtering the power supply output by the input module and then outputting the power supply to the multiplexing module; the multiplexing module is connected with the LED module, the multiplexing module is used for receiving an LIN signal to control the on-off state of the LED module, and the LED module is used for receiving the LIN signal to adjust the working state. According to the utility model, the problem that the working efficiency is influenced by heat accumulation in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of light-emitting driving technology, and in particular to a light-emitting driver, a light-emitting control module, and a light-emitting control driving system. Background Technology

[0002] With the rapid development of automotive technology, people have increasingly valued personalized car designs. Car lights are no longer limited to mere illumination; decorative lights are also gaining popularity. Interior lighting, as a type of automotive lighting, plays an increasingly important role in car interior design. It now incorporates more intelligent human-machine interaction elements, bringing users a completely new sensory experience. To break away from traditional lighting layouts, from monochrome to multicolor, from static to dynamic, and finally to human-machine interaction, a unique light language is gradually being formed between the car and the user, providing consumers with a better driving and riding experience.

[0003] In the field of automotive body communication, body communication systems are mostly CAN and LIN bus systems. However, existing LED drivers have the following disadvantages: due to the high integration and small size of the products, the integrated board and LED beads generate heat during operation, which is difficult to dissipate, leading to a decrease in product efficiency and color deviation.

[0004] Therefore, it is urgent to design a light-emitting driver, a light-emitting control module, and a light-emitting driving control system to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a light-emitting driver, a light-emitting control module, and a light-emitting driving control system, which can solve the problem of heat accumulation affecting working efficiency in the prior art.

[0006] To address the aforementioned technical problems, this utility model provides a light-emitting driver, comprising an input module, a filtering module, at least one set of multiplexing modules, and at least one set of LED modules, wherein each multiplexing module corresponds to one LED module. The output terminal of the input module is connected to the input terminal of the filtering module, and is used to receive external power to supply power to the filtering module. The output terminal of the filtering module is connected to the input terminal of the multiplexing module, and is used to filter the power output from the input module before outputting it to the multiplexing module. The multiplexing module is connected to the LED modules, and the multiplexing module is used to receive LIN signals to control the switching state of the LED modules, while the LED modules are used to receive LIN signals to adjust their operating state.

[0007] As an improvement to the above solution, the multiplexing module includes a seventh capacitor, a Zener diode, a second resistor, a third resistor, and a first MOSFET; the anode of the Zener diode is connected to the gate of the first MOSFET through the second resistor; the cathode of the Zener diode is connected to both the filter module and the source of the first MOSFET; the seventh capacitor is connected in parallel with the Zener diode; the gate of the first MOSFET is also connected to an external slave controller through the third resistor, and the drain of the first MOSFET is connected to the LED module.

[0008] As an improvement to the above solution, the input module includes a first filter component and a first diode; the input terminal of the first filter component is connected to an external power supply circuit, and the output terminal is connected to the filter module through the first diode; the first filter component includes a first capacitor, a first resistor, and a first voltage suppressor connected in parallel.

[0009] As an improvement to the above solution, the filtering module includes a first ferrite bead, a second capacitor, and a third capacitor; one end of the first ferrite bead is connected to the input module and grounded through the second capacitor, and the other end of the first ferrite bead is connected to the multiplexing module and grounded through the third capacitor.

[0010] As an improvement to the above solution, the LED module includes at least one LED unit.

[0011] Correspondingly, this utility model also discloses a light-emitting control module, including a slave controller and the aforementioned light-emitting driver. The slave controller includes an MCU module and a LIN communication module. The LIN communication module is connected to the MCU module and is used to collect LIN signals and send the LIN signals to the MCU module. The MCU module is connected to a multiplexing module and an LED module respectively and is used to send the LIN signals to the multiplexing module and the LED module, so that the multiplexing module controls the switching state of the LED module according to the LIN signals, and the LED module adjusts its working state according to the LIN signals.

[0012] As an improvement to the above solution, the MCU module includes a driver chip; the driver chip has at least one main control pin, at least one pulse control pin, a power supply pin, and a LIN input pin. The main control pin corresponds one-to-one with the multiplexing module, and the pulse control pin corresponds one-to-one with the LED unit in the LED module. The main control pin is connected to the multiplexing module; the pulse control pin is connected to the corresponding LED unit; the power supply pin is connected to the filtering module; and the LIN input pin is connected to the LIN communication module.

[0013] As an improvement to the above solution, the LIN communication module includes a sixth capacitor and a second voltage suppressor; one end of the second voltage suppressor is connected to the MCU module and the external LIN port, and the other end is grounded; one end of the sixth capacitor is connected to the MCU module and the external LIN port, and the other end is grounded.

[0014] Correspondingly, this utility model also discloses a light-emitting drive control system, including a main controller and at least one of the above-mentioned light-emitting control modules, wherein the main controller and the slave controller of the light-emitting control module communicate through a LIN network.

[0015] The beneficial effects of implementing this utility model are as follows:

[0016] This utility model's light-emitting driver filters the power supply through the filtering module and controls the switching state of the LED module through the multiplexing module. For signal transmission, it uses LIN communication, which is less susceptible to interference compared to other communication methods. The overall hardware of this utility model's light-emitting driver mainly includes the LED module and a small number of circuit modules (input module, filtering module, and multiplexing module). While reducing the overall size, it also reduces the number of heat-generating components and lowers heat accumulation.

[0017] Furthermore, the light-emitting control module of this utility model solves the problem that multiple sub-chips are needed to control multiple LED beads in the prior art, and also simplifies the use of chips and complex filtering modules. Compared with the design of one control per channel in the prior art, the light-emitting control module of this utility model is conducive to maintaining the consistency of LED bead color and brightness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the light-emitting driver of this utility model;

[0019] Figure 2 This is a circuit diagram of the first embodiment of the light-emitting driver of this utility model;

[0020] Figure 3 This is a circuit diagram of a second embodiment of the light-emitting driver of this utility model;

[0021] Figure 4 This is a circuit diagram of the third embodiment of the light-emitting driver of this utility model;

[0022] Figure 5 This is a circuit diagram of the fourth embodiment of the light-emitting driver of this utility model;

[0023] Figure 6 This is a circuit diagram of the fifth embodiment of the light-emitting driver of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the light-emitting control module of this utility model;

[0025] Figure 8 This is a schematic diagram of the controller in the light-emitting control module of this utility model;

[0026] Figure 9 This is a schematic diagram of the structure of the light-emitting drive control system of this utility model. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0028] like Figure 1 As shown, the light-emitting driver of this utility model includes an input module 1, a filtering module 2, at least one set of multiplexing modules 3 and at least one set of LED modules 4, wherein the multiplexing module 3 and the LED module 4 correspond one-to-one;

[0029] The output terminal of the input module 1 is connected to the input terminal of the filter module 2, and is used to receive external power to supply power to the filter module 2;

[0030] The output terminal of the filtering module 2 is connected to the input terminal of the multiplexing module 3, and is used to filter the power output from the input module 1 and then output it to the multiplexing module 3.

[0031] The multiplexing module 3 is connected to the LED module 4. The multiplexing module 3 is used to receive LIN signals to control the switching state of the LED module 4, and the LED module 4 is used to receive LIN signals to adjust its working state.

[0032] The light-emitting driver of this utility model filters the power supply through the filtering module 2, and then controls the switching state of the LED module 4 through the multiplexing module 3. In terms of signal transmission, it uses LIN communication, which is less susceptible to interference compared with other communication methods. The overall hardware of the light-emitting driver of this utility model mainly includes the LED module 4 and a small number of circuit modules (input module 1, filtering module 2 and multiplexing module 3). While reducing the overall size, it also reduces the number of heat-generating components and reduces heat accumulation.

[0033] In practical applications, the number of the multiplexing module 3 and LED module 4 can be set according to actual needs, which is highly flexible.

[0034] See Figure 2 , Figure 2The first embodiment of the light-emitting driver of the present invention is shown. In this embodiment, it includes an input module 1, a filtering module 2, three multiplexing modules 3 and three LED modules 4.

[0035] The input module 1, filtering module 2, multiplexing module 3, and LED module 4 of the light-emitting driver of this utility model are described in detail below:

[0036] I. Input Module 1

[0037] The input module 1 includes a first filter component and a first diode D1;

[0038] The input terminal of the first filter component is connected to an external power supply circuit, and the output terminal is connected to the filter module 2 through the first diode D1;

[0039] The first filter component includes a first capacitor C1, a first resistor R1, and a first voltage suppressor TVS1 connected in parallel.

[0040] The unidirectional conductivity of the first diode D1 can prevent the reverse-connected power supply from forming a loop. In the first filter component, the first capacitor C1 and the first resistor R1 filter the externally input power supply. The first voltage suppressor TVS1 protects the downstream devices from being damaged by instantaneous high voltage.

[0041] II. Filtering Module 2

[0042] The filtering module 2 includes a first magnetic bead FB1, a second capacitor C2, and a third capacitor C3;

[0043] One end of the first magnetic bead FB1 is connected to the input module 1 and grounded through the second capacitor C2, and the other end of the first magnetic bead FB1 is connected to the multiplexing module 3 and grounded through the third capacitor C3.

[0044] The filtering module 2 performs high-frequency filtering through the first magnetic bead FB1, the second capacitor C2, and the third capacitor C3, effectively absorbing the signal generated by high-frequency oscillation and avoiding affecting subsequent components.

[0045] III. Reuse Module 3

[0046] Since there are three identical multiplexing modules 3, one of them will be used as an example for explanation. The multiplexing module 3 includes a seventh capacitor C7, a Zener diode D2, a second resistor R2, a third resistor R3, and a first MOSFET Q1.

[0047] The positive terminal of the Zener diode D2 is connected to the gate G of the first MOSFET Q1 through the second resistor R2;

[0048] The negative terminal of the Zener diode D2 is connected to the source S of the filter module 2 and the first MOS transistor Q1, respectively.

[0049] The seventh capacitor C7 is connected in parallel with the Zener diode D2;

[0050] The gate G of the first MOS transistor Q1 is also connected to an external slave controller through the third resistor R3, and the drain D of the first MOS transistor Q1 is connected to the LED module 4.

[0051] IV. LED Module 4

[0052] Since there are three identical LED modules 4, one of them will be used as an example for illustration. The LED module 4 includes at least one LED unit.

[0053] In this embodiment, the LED module 4 includes three LED units: one LED unit includes a blue LED bead B, another LED unit includes a red LED bead R, and another LED unit includes a green LED bead G.

[0054] By controlling the duty cycle of the three light-emitting LEDs (blue LED B, red LED R, and green LED G), various needs can be met:

[0055] When the duty cycles of the three light-emitting LEDs—blue LED B, red LED R, and green LED G—are the same, white light will be generated. For example, when the duty cycles of all three LEDs are 100%, the brightest white light will be generated; when the duty cycles of all three LEDs are 60%, the lowest brightness white light will be generated.

[0056] When the duty cycles of the three light-emitting LEDs—blue LED B, red LED R, and green LED G—are different, different colors of light can be formed. For example, when the duty cycle of the red LED R is 80%, the duty cycle of the green LED G is 100%, and the duty cycle of the blue LED B is 60%, the light produced by mixing them is a light green light with maximum brightness.

[0057] When there is a need to implement flowing water and flashing lights, the frequency of the three light-emitting beads (blue LED B, red LED R, and green LED G) can be controlled to make the corresponding LEDs change accordingly.

[0058] See Figure 3 , Figure 3 A second embodiment of the light-emitting driver of this utility model is shown, with Figure 2 Unlike the first embodiment shown, in this embodiment, one LED unit includes two blue LEDs B connected in series, another LED unit includes two red LEDs R connected in series, and another LED unit includes two green LEDs G connected in series.

[0059] See Figure 4 , Figure 4 This illustrates a third embodiment of the light-emitting driver of the present invention, and... Figure 2 Unlike the first embodiment shown, in this embodiment, each LED unit includes an LED light.

[0060] See Figure 5 , Figure 5 This illustrates a fourth embodiment of the light-emitting driver of the present invention, and... Figure 2 Unlike the first embodiment shown, in this embodiment, each LED unit includes two LEDs connected in series.

[0061] See Figure 6 , Figure 6 This illustrates a fifth embodiment of the light-emitting driver of the present invention, and... Figure 2 Unlike the first embodiment shown, in this embodiment, the LED module includes multiple LEDs connected in series and / or in parallel.

[0062] In summary, when the LED module 4 needs to emit different lights, the first or second embodiment of the light-emitting driver of this utility model is implemented, in which the blue LED B, red LED R and green LED G emit different lights; the third to fifth embodiments of the light-emitting driver of this utility model are suitable for fixed color light combinations.

[0063] like Figure 7 As shown, this utility model also discloses a light-emitting control module, including a slave controller and the above-mentioned light-emitting driver, wherein the slave controller includes an MCU module 5 and a LIN communication module 6;

[0064] The LIN communication module 6 is connected to the MCU module 5 and is used to collect LIN signals and send the LIN signals to the MCU module 5;

[0065] The MCU module 5 is connected to the multiplexing module 3 and the LED module 4 respectively, and is used to send the LIN signal to the multiplexing module 3 and the LED module 4, so that the multiplexing module 3 controls the switching state of the LED module 4 according to the LIN signal, and the LED module 4 adjusts its working state according to the LIN signal.

[0066] The following sections provide a detailed description of MCU module 5 and LIN communication module 6, using specific circuit examples:

[0067] I. MCU Module 5

[0068] like Figure 8 As shown, the MCU module 5 includes a driver chip U1;

[0069] The driver chip U1 has at least one main control pin, at least one pulse control pin, a power supply pin VBAT, and a LIN input pin LIN_IN. The main control pin corresponds one-to-one with the multiplexing module 3, and the pulse control pin corresponds one-to-one with the LED unit in the LED module 4.

[0070] The main control pin is connected to the multiplexing module 3;

[0071] The pulse control pin is connected to the corresponding LED unit;

[0072] The power supply pin VBAT is connected to the filter module 2;

[0073] The LIN input pin LIN_I is connected to the LIN communication module.

[0074] Taking the example of the aforementioned multiplexing module 3 and LED module 4 having three units, and the LED module 4 having three LED units, the MCU module 5 will be further explained in detail:

[0075] The MCU module 5 includes a driver chip U1, a fourth capacitor C4, a fifth capacitor C5, a tenth capacitor C10, an eleventh capacitor C11, and a twelfth capacitor C12.

[0076] The driver chip U1 has a 3.3V positive power supply pin VDD3V3, a 1.5V positive power supply pin VDD1V5, a first main control pin GPIO1, a second main control pin GPIO2, a third main control pin GPIO3, a zero pulse control pin LED0, a first pulse control pin LED1, a second pulse control pin LED2, a power supply pin VBAT, and a LIN input pin LIN_IN.

[0077] The 3.3V positive power supply pin VDD3V3 is connected to an external 3.3V power supply and grounded through the fourth capacitor C4;

[0078] The 1.5V positive power supply pin VDD1V5 is connected to an external 1.5V power supply and grounded through the fifth capacitor C5;

[0079] The first main control pin GPIO1 is connected to the multiplexing module 3 and grounded through the tenth capacitor C10;

[0080] The second main control pin GPIO2 is connected to the multiplexing module 3 and grounded through the eleventh capacitor C11;

[0081] The third main control pin GPIO3 is connected to the multiplexing module 3 and grounded through the twelfth capacitor C12;

[0082] The zero pulse control pin LED0, the first pulse control pin LED1, and the second pulse control pin LED2 are respectively connected to the three LED units in the LED module 4;

[0083] The power supply pin VBAT is connected to the filter module 2;

[0084] The LIN input pin LIN_IN is connected to the LIN communication module 6.

[0085] II. LIN Communication Module 6

[0086] like Figure 8 As shown, the LIN communication module 6 includes a sixth capacitor C6 and a second voltage suppressor TVS2;

[0087] One end of the second voltage suppressor TVS2 is connected to the MCU module 5 and the external LIN port, and the other end is grounded;

[0088] One end of the sixth capacitor C6 is connected to the MCU module 5 and the external LIN port, and the other end is grounded.

[0089] This utility model of a light-emitting control module solves the problem of needing multiple sub-chips to control multiple LED beads in the prior art, and also simplifies the use of chips and complex filtering modules. Compared with the design of one control per channel in the prior art, this utility model of a light-emitting control module is beneficial to maintaining the consistency of LED bead color and brightness.

[0090] like Figure 9 As shown, this utility model also discloses a light-emitting drive control system, including a main controller 7 and at least one of the above-mentioned light-emitting control modules 8, wherein the main controller 7 and the slave controller of the light-emitting control module 8 communicate through a LIN network.

[0091] Therefore, this invention uses a LIN network for communication, which is less susceptible to interference compared to other communication methods. Furthermore, compared to the existing one-channel-one-control design, the light-emitting control module of this invention helps maintain the consistency of the LED color and brightness.

[0092] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A light-emitting driver, characterized in that, It includes an input module, a filtering module, at least one set of multiplexing modules, and at least one set of LED modules, wherein the multiplexing modules and LED modules correspond one-to-one. The output terminal of the input module is connected to the input terminal of the filter module, and is used to receive external power to supply power to the filter module; The output terminal of the filtering module is connected to the input terminal of the multiplexing module, and is used to filter the power output from the input module before outputting it to the multiplexing module. The multiplexing module is connected to the LED module. The multiplexing module is used to receive LIN signals to control the switching state of the LED module. The LED module is used to receive LIN signals to adjust its working state.

2. The light-emitting driver according to claim 1, characterized in that, The multiplexing module includes a seventh capacitor, a Zener diode, a second resistor, a third resistor, and a first MOSFET; The positive terminal of the Zener diode is connected to the gate of the first MOSFET through the second resistor; The negative terminal of the Zener diode is connected to both the filter module and the source of the first MOSFET. The seventh capacitor is connected in parallel with the Zener diode; The gate of the first MOS transistor is also connected to an external slave controller through the third resistor, and the drain of the first MOS transistor is connected to the LED module.

3. The light-emitting driver according to claim 1, characterized in that, The input module includes a first filter component and a first diode; The input terminal of the first filter component is connected to an external power supply circuit, and the output terminal is connected to the filter module through the first diode; The first filter component includes a first capacitor, a first resistor, and a first voltage suppressor connected in parallel.

4. The light-emitting driver according to claim 1, characterized in that, The filtering module includes a first ferrite bead, a second capacitor, and a third capacitor; One end of the first magnetic bead is connected to the input module and grounded through the second capacitor, and the other end of the first magnetic bead is connected to the multiplexing module and grounded through the third capacitor.

5. The light-emitting driver according to claim 1, characterized in that, The LED module includes at least one LED unit.

6. A light-emitting control module, characterized in that, The system includes a controller and a light-emitting driver according to any one of claims 1 to 5, wherein the controller includes an MCU module and a LIN communication module; The LIN communication module is connected to the MCU module and is used to collect LIN signals and send the LIN signals to the MCU module. The MCU module is connected to the multiplexing module and the LED module respectively, and is used to send the LIN signal to the multiplexing module and the LED module, so that the multiplexing module controls the switching state of the LED module according to the LIN signal, and the LED module adjusts its working state according to the LIN signal.

7. The light-emitting control module according to claim 6, characterized in that, The MCU module includes a driver chip; The driver chip has at least one main control pin, at least one pulse control pin, a power supply pin, and a LIN input pin. The main control pin corresponds one-to-one with the multiplexing module, and the pulse control pin corresponds one-to-one with the LED unit in the LED module. The main control pin is connected to the multiplexing module; The pulse control pin is connected to the corresponding LED unit; The power supply pin is connected to the filtering module; The LIN input pin is connected to the LIN communication module.

8. The light-emitting control module according to claim 6, characterized in that, The LIN communication module includes a sixth capacitor and a second voltage suppressor; One end of the second voltage suppressor is connected to the MCU module and the external LIN port, and the other end is grounded; One end of the sixth capacitor is connected to the MCU module and the external LIN port, and the other end is grounded.

9. A light-emitting driving control system, characterized in that, It includes a main controller and at least one light-emitting control module as described in any one of claims 6 to 8, wherein the main controller and the slave controller of the light-emitting control module communicate via a LIN network.

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