LED light source module layout system suitable for car lamp

Abstract

The invention relates to the technical field of car lamp circuit layout, and provides an LED light source module layout system suitable for a car lamp, the LED light source module layout system is used for a headlight or a rear light, the LED light source module layout system comprises a driving module and an LED light source module, the driving module and the LED light source module are integrally arranged, and the driving module is detachably connected with other LED light source modules. According to the invention, the signal coupling between the wire harnesses is greatly reduced, the conduction and radiation interference is reduced, and the EMC performance is improved.

Description

Technical Field

[0001] This application relates to the technical field of headlight circuit layouts, and particularly to an LED light source module layout system applicable to headlight fixtures. Background Art

[0002] In the current continuous development of the automotive lighting field, consumers' pursuit of the uniqueness of the automotive appearance and the functionality of the lamps is increasing. Nowadays, the design form of through lights is popular in the market. Its smooth lines and unique lighting effects endow the vehicle with a stronger sense of technology and recognition. Various novel and magnificent welcome functions also greatly improve the user experience. However, at the same time, the internal space of the lamp is becoming increasingly compact. In the past LED headlight designs, the LED driver used an independent module, with multiple LED light boards. Each component was connected by a wire harness. This traditional design could meet the basic lighting requirements at that time, but due to the use of more wire harnesses, it was easy to affect the product performance due to signal coupling problems between the wire harnesses. Summary of the Invention

[0003] In order to reduce the signal coupling problem between wire harnesses, this application provides an LED light source module layout system applicable to headlight fixtures.

[0004] This application provides an LED light source module layout system applicable to headlight fixtures, adopting the following technical solutions: An LED light source module layout system applicable to headlight fixtures, for a front headlight or a rear headlight, includes a driving module and an LED light source module. The driving module and the LED light source module are integrally arranged, and the driving module is detachably connected to other LED light source modules.

[0005] By adopting the above technical solutions, the circuit layout is optimized, the return area of the output loop is reduced, the driving module and an LED light source module are integrally arranged, the number of wire harnesses used for connection on the headlight is reduced, the signal coupling between wire harnesses is greatly reduced, the conduction and radiation interference are reduced, and the EMC performance is improved; at the same time, through the detachable connection between the driving module and other LED light source modules, the purpose of flexibly setting multiple LED light source modules can be achieved, which can be applicable to different headlight requirements and can also meet the function of driving multiple LED light source modules by the same driving module.

[0006] Preferably, the LED light source module includes a circuit board and multiple parallel-connected LED lights. The multiple LED lights are arranged on the circuit board, and the driving module is arranged on one of the circuit boards; the multiple circuit boards are connected by wire harnesses, and the number of wire harnesses is adapted to the number of LED lights arranged on two adjacent circuit boards; and the layout of the multiple circuit boards is adapted to the shape of the headlight.

[0007] By adopting the above technical solution, since the shape of vehicle lamps, especially through lamps, is usually irregular, multiple circuit boards are required; in this application, the drive module and some of the LED lamps are integrated on one of the circuit boards, and this circuit board is connected to the adjacent circuit board through a wire harness corresponding to the number of LED lamps, effectively reducing the number of wire harnesses used and lowering the material cost; at the same time, by reducing the number of wire harnesses, the signal coupling between the wire harnesses is reduced, that is, the conducted and radiated interference is reduced, thereby improving the anti-interference performance of the product.

[0008] Preferably, a plurality of the LED lamps are signal-connected to an LED power supply terminal; the drive module includes a drive chip, the drive chip is signal-connected to a plurality of the LED lamps, and the drive chip is signal-connected to a chip power supply terminal and a communication terminal; The communication terminal receives a lighting instruction and transmits it to the drive chip, and the drive chip executes the lighting instruction; wherein, the lighting instruction is output by the vehicle control system.

[0009] By adopting the above technical solution, a stable power supply and signal communication method ensures that the drive chip accurately receives and executes the lighting instruction, ensuring that the LED light source can achieve the expected animation effect, improving the functionality and ornamental value of the vehicle lamp, and meeting the user's demand for personalized display of the vehicle lamp.

[0010] Preferably, a chip port filtering unit and a power supply filtering unit are further included. The chip port filtering unit is arranged at the input end of the LED light source module, and the power supply filtering unit is arranged at the power supply end of the LED light source module.

[0011] By adopting the above technical solution, the chip port filtering unit can effectively prevent surge signals from damaging the backend chip, and the power supply filtering unit can effectively protect the LED light source, improving the reliability and stability of the system.

[0012] Preferably, a binning resistor unit is further included. The binning resistor unit includes a plurality of resistors for adjusting the drive current of the LED lamps.

[0013] By adopting the above technical solution, the luminous flux is adjusted by adjusting the current of the LED lamps, so that the luminous flux can be in different ranges, thereby improving the lighting effect and optical performance of the vehicle lamp and providing a better lighting experience for users.

[0014] Preferably, the circuit board adopts an FR4 circuit board, the wire harness adopts an FPC flexible board, and the FPC flexible board and the FR4 circuit board are signal-connected through a connector or form a signal connection through a lamination process.

[0015] By adopting the above technical solution, the FPC flexible board and the FR4 circuit board are connected through a connector, which can realize the replacement of a damaged circuit board or the combination of different circuit boards into a layout system suitable for different vehicle lamps; through press-fit connection, the traditional wire harness connection method is replaced, avoiding the signal coupling of the traditional wire harness connection method, improving the EMC performance and increasing the product stability.

[0016] Preferably, it further includes a CAN transceiver and a CAN signal input terminal filtering unit. The input terminal of the CAN transceiver signal is connected to the CAN signal input terminal filtering unit, and the CAN transceiver and the CAN signal input terminal filtering unit are arranged on the same FR4 circuit board.

[0017] By adopting the above technical solution, while preventing surge damage, it reduces the conducted and radiated interference in the EMC test, protecting the normal operation of the chip; at the same time, it reduces the use of additional circuit boards and connection lines, reducing the influence of signal coupling.

[0018] Preferably, a pull-up resistor is also arranged between the CAN transceiver and the LED light source module.

[0019] By adopting the above technical solution, the stability of the output signal of the CAN transceiver is enhanced through the pull-up resistor.

[0020] In summary, the present application has at least the following beneficial effects: 1. The integrated design of the drive module and the LED light source reduces the return area of the output loop, greatly reduces the signal coupling between wire harnesses, reduces the conducted and radiated interference, and improves the EMC performance of the product; at the same time, it saves the material cost.

[0021] 2. By connecting the FPC flexible board and the FR4 circuit board through a connector, it can realize the replacement of a damaged circuit board or the combination of different circuit boards into a layout system suitable for different vehicle lamps; through press-fit connection, the traditional wire harness connection method is replaced, avoiding the signal coupling of the traditional wire harness connection method, improving the EMC performance and increasing the product stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of an LED light source module layout system suitable for vehicle lamp fixtures of the present application; Figure 2 It is a schematic structural diagram of the front vehicle lamp of an LED light source module layout system suitable for vehicle lamp fixtures of the present application; Figure 3 It is a schematic structural diagram of the drive module of an LED light source module layout system suitable for vehicle lamp fixtures of the present application; Figure 4Schematic diagram of the brake light of the rear lamp of an LED light source module layout system applicable to vehicle lamps according to the present application; Figure 5 Schematic diagram of the position lamp of the rear lamp of an LED light source module layout system applicable to vehicle lamps according to the present application. Specific embodiments

[0023] With reference to the accompanying drawings and specific embodiments, the composition, characteristics, advantages, etc. of an LED light source module layout system applicable to vehicle lamps according to the present application will be described by way of example below. However, all descriptions should not form any limitation to the present application.

[0024] In addition, for any single technical feature described or implied in the embodiments mentioned in this article, or any single technical feature shown or implied in the respective drawings, the present application still allows any combination or deletion to continue between these technical features (or their equivalents) without any technical obstacles. Therefore, it should be considered that these more embodiments according to the present application are also within the scope of the present article.

[0025] It should also be noted that terms such as "arrangement" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated as a whole; it can be directly connected, or indirectly connected through an intermediate medium. Unless otherwise clearly defined, those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0026] At present, with the continuous development of automotive lighting technology, in order to meet the market's requirements for the aesthetics, functionality, and stability of vehicle lamps, the present application discloses an LED light source module layout system applicable to vehicle lamps, which can be applied to front vehicle lamps or rear vehicle lamps. Figure 1 Schematic diagram of a structure of an embodiment of an LED light source module layout system applicable to vehicle lamps according to the present application.

[0027] The above system mainly includes a driving module and multiple LED light source modules. The specific number of LED light source modules is determined by requirements such as the shape and brightness of the vehicle lamps; and the driving module is integrally arranged with one of the LED light source modules, and... detachable connection. Through the integrated arrangement, the circuit layout is greatly optimized, the return area of the output loop is reduced, and the number of wiring harnesses used for connection on the vehicle lamp is effectively reduced. The reduction in the number of wiring harnesses significantly reduces the signal coupling between the wiring harnesses, reduces the conduction and radiation interference, thereby improving the EMC (electromagnetic compatibility) performance of the entire system and ensuring that the system can operate stably and reliably in a complex electromagnetic environment.

[0028] Specifically, the LED light source module includes a circuit board and multiple parallel-connected LED lights. The number of LED lights is specifically determined by the position of the LED light source module relative to the position inside the vehicle headlight. The multiple LED lights are signal-connected to an LED power supply terminal to provide a stable power supply for the LED lights. Since the space of the vehicle headlight is limited and the shape is mostly irregular, through the arrangement of multiple circuit boards, the LED light source module layout system can meet more vehicle headlight design requirements. The driving module is arranged on one of the circuit boards to form an integrated setting; and the multiple circuit boards are connected by wire harnesses to form a detachable connection. The number of wire harnesses can be determined by the number of LED lights arranged on two adjacent circuit boards; this not only effectively reduces the number of wire harnesses used, reduces the material cost, but also further reduces the signal coupling between wire harnesses, reduces conduction and radiation interference, and improves the anti-interference performance of the product.

[0029] For the vehicle headlights of modern cars, especially the popular through lights used in the front headlights, because they need to be adapted to the shape of the vehicle, the shape of the front headlights is usually irregular. The design of multiple circuit boards can better adapt to the shape of the vehicle headlight; at the same time, through the detachable connection formed by wire harnesses, not only can the damaged LED light source module be replaced, but also the LED light source module that meets the requirements can be replaced according to different vehicle headlight shapes, brightness and other requirements.

[0030] The driving module includes a driving chip. The driving chip is signal-connected to multiple LED lights and is also signal-connected to a chip power supply terminal and a communication terminal. The communication terminal can use CAN communication, be responsible for receiving the lighting instruction, and transmit the lighting instruction to the driving chip. After receiving the instruction, the driving chip will accurately execute the lighting operation to ensure that the LED light source can achieve the expected animation effect, improve the functionality and ornamental value of the vehicle headlight, and meet the user's demand for personalized display of the vehicle headlight. It should be understood that the above lighting instruction refers to the command for lighting output by the vehicle control system, such as the high beam, low beam, and double flash lights of the front headlights, the brake light and position light of the rear lights, etc.

[0031] In the embodiment of the present application, a chip port filtering unit and a power supply filtering unit are also provided. The chip port filtering unit is arranged at the input end of the LED light source module and can prevent surge signals from damaging the rear-end chip. When abnormal situations such as voltage mutations occur in the outside world, the chip port filtering unit can filter out harmful signals in time to protect the safety of the chip. The power supply filtering unit is arranged at the power supply end of the LED light source module and can effectively protect the LED light source. By filtering out the noise and interference signals in the power supply, it ensures that the LED light source obtains a stable and pure power supply, improving the reliability and stability of the entire system.

[0032] To further optimize the lighting effect of the LED lamp, a binning and resistor matching unit is also configured in the embodiments of the present application. The binning and resistor matching unit consists of multiple resistors, and its function is to adjust the driving current of the LED lamp. Since there may be certain parameter differences in different LED lamps during the production process, by adjusting the current through the binning and resistor matching unit, the luminous flux of each LED lamp can be within a suitable range to achieve the aforementioned different lighting instructions, thereby improving the overall lighting effect and optical performance of the vehicle lamp and providing a better lighting experience for users.

[0033] When the embodiments of the present application are applied to the rear lamp of a vehicle, the circuit board can adopt an FR4 circuit board, and the wire harness adopts an FPC flexible board. The FPC flexible board and the FR4 circuit board are detachably connected through a connector, and in some cases, a press-fit connection can also be directly adopted. The connection method through the connector facilitates the replacement of a damaged circuit board and also facilitates connecting different circuit boards according to the requirements of different vehicle lamps. It should be understood that the circuits here may differ in the shape and size of the circuit board, or in the number or arrangement of the LED lamps on the circuit board, subject to meeting the requirements of the vehicle lamp.

[0034] The press-fit connection replaces the traditional wire harness connection method, effectively avoiding the signal coupling problem that easily occurs in the traditional method. By reducing signal interference, the EMC performance of the system is improved, the stability of the product is increased, and at the same time, the production efficiency and product quality are also improved. It should be understood that the connector here refers to a device commonly used between the FPC flexible board and the FR4 circuit board for forming a signal connection. And the press-fit connection The above-mentioned system in the embodiments of the present application further includes a CAN transceiver and a CAN signal input terminal filtering unit. The input terminal of the CAN transceiver signal is connected to the CAN signal input terminal filtering unit, and the CAN transceiver and the CAN signal input terminal filtering unit are arranged on the same FR4 circuit board. Such a design can not only prevent surge damage and reduce the conducted and radiated interference in the EMC test to protect the normal operation of the chip, but also reduce the use of additional circuit boards and connection lines, further reducing the influence of signal coupling and improving the overall performance of the system.

[0035] In addition, a pull-up resistor is arranged between the CAN transceiver and the LED light source module. The pull-up resistor can enhance the stability of the output signal of the CAN transceiver, ensure that the signal can remain clear and accurate during transmission, avoid system failures caused by signal fluctuations, and further improve the reliability and stability of the system. In summary, the LED light source module layout system applicable to vehicle lamps has achieved remarkable effects in reducing costs, improving performance, and enhancing stability through a series of innovative designs and optimizations, and can well meet the development needs of modern automotive lamps.

[0036] Working principle of the embodiment of the present application: By integrating the driving module and the LED light source module, the circuit layout is optimized, and the components required for the vehicle lamp are reasonably arranged within a limited space, effectively reducing the return area of the output loop and significantly reducing the number of wire harnesses used to connect the various components of the vehicle lamp; not only greatly reducing the signal coupling phenomenon between wire harnesses, but also significantly reducing the levels of conducted interference and radiated interference, thereby greatly improving the electromagnetic compatibility (EMC) performance of the vehicle lamp and ensuring the stable operation of the vehicle lamp in a complex electromagnetic environment.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An LED light source module layout system suitable for vehicle lamps, used for vehicle headlights or vehicle taillights, characterized in that: It comprises a driving module and a plurality of LED light source modules. The driving module is integrated with one of the LED light source modules, and the driving module is detachably connected to the other LED light source modules.

2. The LED light source module layout system for vehicle lamps according to claim 1, characterized in that: The LED light source module includes a circuit board and multiple parallel LED lamps, the multiple LED lamps are arranged on the circuit board, and the driving module is arranged on one of the circuit boards; the multiple circuit boards are connected by wiring harnesses, and the number of the wiring harnesses is adapted to the number of the LED lamps arranged on two adjacent circuit boards; and the layout of the multiple circuit boards is adapted to the shape of the vehicle lamp.

3. The LED light source module layout system for vehicle lamps according to claim 2, characterized in that: The plurality of LED lights are signal-connected to an LED power supply terminal; the driving module comprises a driving chip, the driving chip is signal-connected to the plurality of LED lights, and the driving chip is signal-connected to a chip power supply terminal and a communication terminal; The communication terminal receives the lighting instruction and transmits it to the driving chip, and the driving chip executes the lighting instruction; wherein the lighting instruction is output by the vehicle control system.

4. The LED light source module layout system for vehicle lamps according to claim 1, characterized in that: It also includes a chip port filter unit and a power filter unit. The chip port filter unit is arranged at the input end of the LED light source module, and the power filter unit is arranged at the power supply end of the LED light source module.

5. The LED light source module layout system for vehicle lamps according to claim 1, characterized in that: It also includes a binned resistance matching unit, which includes a plurality of resistors for adjusting the driving current of the LED lamp.

6. The LED light source module layout system for vehicle lamps according to claim 2, characterized in that: The circuit board adopts a FR4 circuit board, and the wiring harness adopts a FPC soft board. The FPC soft board and the FR4 circuit board form a signal connection through a connector or through a pressing process.

7. The LED light source module layout system for vehicle lamps according to claim 6, characterized in that: It also includes a CAN transceiver and a CAN signal input end filtering unit, the input end of the CAN transceiver signal is connected to the CAN signal input end filtering unit, and the CAN transceiver and the CAN signal input end filtering unit are arranged on the same FR4 circuit board.

8. The LED light source module layout system for vehicle lamps according to claim 7, characterized in that: A pull-up resistor is arranged between the CAN transceiver and the LED light source module.

Images