Multiplexing structure for expanding channels of LED (light-emitting diode) driving chip

Abstract

The utility model belongs to the technical field of LED driving chips, and particularly relates to a channel multiplexing structure for expanding an LED driving chip, which comprises a power supply input module for inputting a power supply; the power supply output module is electrically connected with a logic control module and an LED driving module, the LED driving module is electrically connected with the logic control module, the logic control module is electrically connected with an LED light source module, and the LED light source module is electrically connected with the LED driving module; the LED driving module comprises a plurality of LED driving chips so as to be matched with LEDs with different functions; the expanded LED driving chip channel multiplexing structure has the advantages that many driving modules cannot be placed or wires in the PCB cannot be connected completely, a multi-layer PCB with higher cost needs to be used for meeting the design requirement, and the cost of a lamp is increased.

Description

Technical Field

[0001] This utility model belongs to the technical field of LEDs, and specifically relates to an extended LED driver chip channel multiplexing structure. Background Technology

[0002] In current conventional designs, LED driver circuits are matched to the number of LEDs for each function. Even in areas where different functions share a light-emitting area, where different LEDs do not light up simultaneously, their driver circuits are designed separately for each LED. However, due to the diverse effects of modern lighting fixtures and the often large number of LEDs, the cost of the selected driver chips is relatively high. Conventional designs sometimes waste chip resources, leading to cost inefficiencies and higher fixture costs, making them less competitive in the market. In designs with limited space and a large number of LEDs, it is often impossible to accommodate many driver modules or achieve complete PCB trace connections, necessitating the use of more expensive multi-layer PCBs, further increasing fixture costs. Utility Model Content

[0003] The purpose of this invention is to provide an extended LED driver chip channel reuse structure to solve the technical problems that often cannot accommodate more driver modules or the traces in the PCB cannot be fully connected, requiring the use of more expensive multilayer PCBs to meet the design requirements, which also increases the cost of the lamp. By adding a logic control module between the power input module and the LED light source module, the same driver can drive more LED light sources, reducing the number of drivers, avoiding waste of chip resources, optimizing the design, reducing the cost of the lamp, and making it more competitive in the market.

[0004] To address the aforementioned technical problems, this utility model provides an extended LED driver chip channel reuse structure, comprising:

[0005] Power input module, wherein the power input module inputs power;

[0006] The power output module is electrically connected to a logic control module and an LED driver module. The LED driver module is electrically connected to the logic control module, the logic control module is electrically connected to an LED light source module, and the LED light source module is electrically connected to the LED driver module.

[0007] The LED driver module includes several LED driver chips to match LEDs with different functions;

[0008] The logic control module includes an LED driver chip U1 whose OUT-C pin outputs a high level. When the switch Q1 is not input, the network VS1 has no power, and the LED light source driven by VS1 cannot be lit. When the OUT-C pin outputs a high level, the switch Q2 is turned off and Q3 is turned on, the network VS2 has output power, and the LED light source driven by VS2 is lit.

[0009] When the OUT-C pin of the LED driver chip U1 outputs a low level, the switching transistor Q1 is turned on, and the network VS1 has an output power supply, so the LED light source driven by VS1 lights up; when the OUT-C pin outputs a low level, the switching transistor (MOSFET or transistor) Q2 is turned on and Q3 is turned off, the network VS2 has no output power supply, so the LED light source driven by VS2 cannot light up.

[0010] The beneficial effects of the above features are as follows: When using different functional outputs for a shared light-emitting area, different functional lighting can be switched by configuring the OUT-C pin of the driver chip U1 to output high and low level signals. For the scheme of expanding the channel, all LEDs can be visually lit simultaneously by configuring the OUT-C pin of the driver chip U1 to output a high-frequency PWI signal.

[0011] Furthermore, the power input module includes a TVS diode and a capacitor C2 to absorb power supply port pulses and static electricity, and filter out high and low frequency interference at the power supply port; diode D1 is used for reverse connection protection of the circuit.

[0012] Furthermore, the different functional LEDs include position lights, turn signals, brake lights, reversing lights, and rear fog lights.

[0013] The beneficial effects of this utility model are:

[0014] 1. Due to the different priorities of the various functions of the lights, a reused LED drive channel design was implemented. Under the normal lighting logic requirements of the lights, this design ensures that individual lighting functions remain lit, while also ensuring that different functions can be lit simultaneously to meet the vehicle body logic requirements.

[0015] 2. Adding a logic control module between the power input module and the LED light source module allows the same driver to drive more LED light sources, reducing the number of drivers, avoiding waste of chip resources, optimizing the design, and reducing the cost of the lamp.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a structural block diagram of the extended LED driver chip channel multiplexing structure of this utility model;

[0019] Figure 2 This is a circuit diagram of the power input module of the extended LED driver chip channel multiplexing structure of this utility model;

[0020] Figure 3 This is a circuit diagram of the logic control module of the extended LED driver chip channel multiplexing structure of this utility model;

[0021] Figure 4 This is a circuit diagram of an LED light source module with an extended LED driver chip channel multiplexing structure according to this utility model;

[0022] Figure 5 This is a circuit diagram of an LED driver module with an extended LED driver chip channel multiplexing structure according to this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example:

[0025] like Figures 1 to 5 As shown, an extended LED driver chip channel multiplexing structure includes: a power input module that inputs power; a power output module electrically connected to a logic control module and an LED driver module; the LED driver module electrically connected to the logic control module; the logic control module electrically connected to an LED light source module; and the LED light source module electrically connected to the LED driver module.

[0026] The LED driver module includes several LED driver chips to match LEDs with different functions; the logic control module includes LED driver chip U1. When the OUT-C pin outputs a high level, the switch Q1 is not powered, so the network VS1 has no power and the corresponding LED light source driven by VS1 cannot be lit; when the OUT-C pin outputs a high level, the switch Q2 is turned off and Q3 is turned on, the network VS2 has power output, and the corresponding LED light source driven by VS2 is lit.

[0027] When the OUT-C pin of the LED driver chip U1 outputs a low level, the switching transistor Q1 is turned on, and the network VS1 has an output power supply, so the LED light source driven by VS1 lights up; when the OUT-C pin outputs a low level, the switching transistor (MOSFET or transistor) Q2 is turned on and Q3 is turned off, the network VS2 has no output power supply, so the LED light source driven by VS2 cannot light up.

[0028] When using different functional outputs for a shared light-emitting area, different functional lighting can be switched by configuring the OUT-C pin of the driver chip U1 to output high and low level signals. For the scheme of expanding the channel, all LEDs can be visually lit simultaneously by configuring the OUT-C pin of the driver chip U1 to output a high-frequency PWI signal.

[0029] The power input module includes a TVS diode and a capacitor C2 to absorb power supply port pulses and static electricity, and filter out high and low frequency interference at the power supply port; diode D1 is used for reverse connection protection of the circuit.

[0030] The LEDs with different functions include position lights, turn signals, brake lights, reversing lights, and rear fog lights.

[0031] In summary, due to the different priorities of various lamp functions, a reusable LED driver channel design was implemented. Under the normal lighting logic requirements of the lamps, this design ensures that individual lighting functions remain lit while simultaneously enabling different functions to light up, meeting the vehicle body's logic requirements. Adding a logic control module between the power input module and the LED light source module allows a single driver to drive more LEDs, reducing the number of drivers, avoiding wasted chip resources, optimizing the design, and lowering the cost of the lamps.

[0032] Conventional designs often use different driver circuits for different functions, resulting in wasted design resources. Because different functions share the light-emitting surface, even if signals from different functions are input simultaneously, only the function with higher priority will be displayed, while the function with lower priority will be ignored. This patented design solution can meet the requirements of both limited space and the need for different functions to share the light-emitting surface, thus optimizing the cost of the luminaire.

[0033] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0034] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An extended LED driver chip channel multiplexing structure, characterized in that, It includes: Power input module, the power input module input power; Power output module is connected with logic control module and LED drive module, the LED drive module is connected with logic control module, the logic control module is connected with LED light source module, the LED light source module is connected with LED drive module; The LED drive module includes several LED drive chips to match different function LED; The logic control module includes LED drive chip U1 OUT-C pin output high level, switch tube Q1 does not input, then network VS1 has no electricity, corresponding VS1 driven LED light source cannot be lit; OUT-C pin output high level, switch tube Q2 is closed, Q3 is opened, network VS2 has output power, corresponding VS2 driven LED light source lights up; When LED drive chip U1 OUT-C pin output low level, switch tube Q1 is opened, then network VS1 has output power, corresponding VS1 driven LED light source lights up; OUT-C pin output low level, switch tube Q2 is opened, Q3 is closed, network VS2 has no output power, corresponding VS2 driven LED light source cannot be lit.

2. The structure of claim 1, wherein the power input module includes a TVS tube and a capacitor C2 for absorbing power supply port pulse, static electricity, filtering power supply port high and low frequency interference; diode D1 is used for circuit anti-reverse connection protection.

3. The structure of claim 2, wherein the different function LED includes position light, turn signal, brake light, reversing light, rear fog light. ​ ​

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