Atmosphere lamp driving chip, system and vehicle

Abstract

The utility model relates to an atmosphere lamp driving chip and system and a vehicle. The atmosphere lamp driving chip comprises an atmosphere lamp driving module, a CAN communication module and a control module. The control module is connected with the CAN communication module and the atmosphere lamp driving module. Wherein the CAN communication module is used for receiving an atmosphere lamp display request and transmitting the request to the control module; the control module is used for responding to the request and outputting a control instruction to the atmosphere lamp driving module; and the atmosphere lamp driving module drives the atmosphere lamp to display according to the control instruction. The atmosphere lamp driving chip is high in reliability and high in integration level, the required PCB space is small, and an atmosphere lamp driving system is simple in design. Meanwhile, the method can be suitable for CAN communication, and the communication efficiency is high.

Description

Technical Field

[0001] The present application relates to the field of vehicle electronic technology, and more specifically, to an ambient light driving chip, an ambient light driving system and a vehicle. Background Art

[0002] With the rapid advancement of automotive electronic technology, ambient lighting, as an important part of the car's interior lighting system, can not only provide basic lighting functions, but also create different atmospheres through lights of different colors, brightness and modes, making drivers and passengers feel more comfortable, warm and pleasant in the car.

[0003] The on and off, color change and brightness adjustment of the ambient light need to be controlled by the ambient light driver chip. At present, most ambient light driver solutions require an external controller on the ambient light driver chip. This solution has poor reliability and requires more PCB board space. In addition, in the existing solution, the ambient light driver chip can only receive external input ambient light display requests through LIN communication, and the communication efficiency is low. Utility Model Content

[0004] One purpose of the embodiments of the present application is to provide a new ambient light driver chip, an ambient light driver system and a vehicle. The ambient light driver chip of the embodiments of the present application has strong reliability and high integration, requires a small PCB board space, and has a simple ambient light driver system design. At the same time, it can be applied to CAN communication with high communication efficiency.

[0005] According to a first aspect of the present application, an ambient light driving chip is provided, comprising: an ambient light driving module, a CAN communication module and a control module.

[0006] The control module is connected to the CAN communication module and the atmosphere light driving module respectively;

[0007] Wherein, the CAN communication module is used to receive an ambient light display request and transmit the request to the control module;

[0008] The control module is used to respond to the request and output a control instruction to the atmosphere light driving module;

[0009] The atmosphere light driving module drives the atmosphere light to display according to the control instruction.

[0010] Optionally, the atmosphere lamp driving module is used to be connected to the first end of the atmosphere lamp.

[0011] The chip further comprises an enabling driving module, an input end of the enabling driving module is connected to the control module, and an output end of the enabling driving module is used to be connected to the second end of the atmosphere lamp to provide an enabling signal for the atmosphere lamp.

[0012] Optionally, the enabling driving module includes a plurality of output terminals for connecting to the atmosphere lamp.

[0013] Wherein, the enabling driving module is used to control the plurality of atmosphere lights to display the flowing water effect.

[0014] Optionally, the enabling driving module includes a high-side driving switch, and the enabling driving module controls the plurality of the atmosphere lights to display a flowing water effect through the high-side driving switch.

[0015] Optionally, it further comprises a signal acquisition module, wherein the signal acquisition module is connected to the control module.

[0016] Wherein, the signal acquisition module is used to collect at least any one of the following: the running state of the chip and the working state of the atmosphere light.

[0017] Optionally, a power supply module is further included, and the power supply module is used to provide electrical energy to the chip.

[0018] According to a second aspect of the present application, an ambient light driving system is provided, comprising a chip as described in any one of the first aspects of the present application and the ambient light.

[0019] Optionally, the atmosphere light is connected between a high-side driver module and the atmosphere light driver module.

[0020] Optionally, there are multiple atmosphere lights, and the multiple atmosphere lights are connected in parallel.

[0021] According to a third aspect of the present application, a vehicle is provided, comprising the system as described in the second aspect of the present application.

[0022] One beneficial effect of the embodiment of the present application is that the embodiment of the present application integrates the atmosphere light driving module, the CAN communication module and the control module into one chip, which has high reliability, small PCB board space, high integration and low cost. Moreover, when the atmosphere light system is designed using the highly integrated atmosphere light driving chip of the present embodiment, only a small amount of peripheral circuits need to be added. In this way, the circuit design can be simplified and the stability and reliability of the circuit can be improved.

[0023] In addition, compared with the existing solution that only supports LIN communication, the ambient light driving chip of this embodiment supports CAN communication, and the communication efficiency is high.

[0024] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0026] Figure 1 It is a structural schematic diagram of an atmosphere light driving system provided according to an embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram of an atmosphere light driving system provided according to another embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram of an atmosphere light driving system provided according to another embodiment of the present application.

[0029] Figure 4 It is a structural schematic diagram of an atmosphere light driving system provided according to another embodiment of the present application.

[0030] Figure 5 This is a schematic diagram of the connection between an ambient light driving chip and an ambient light provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0032] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0033] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] With the rapid advancement of automotive electronic technology, ambient lights (such as vehicle door panel ambient lights and D-pillar lights), as an important part of the vehicle's interior lighting system, can not only provide basic lighting functions, but also create different atmospheres through lights of different colors, brightness and modes, making drivers and passengers feel more comfortable, warm and pleasant in the car.

[0037] The on and off, color change and brightness adjustment of the ambient light need to be controlled by the ambient light driver chip. At present, most ambient light driver solutions require an external controller on the ambient light driver chip. This solution has poor reliability and requires more PCB board space. In addition, in the existing solution, the ambient light driver chip can only receive external input ambient light display requests through LIN communication, and the communication efficiency is low.

[0038] Based on this, the embodiment of the present application provides a new ambient light driver chip. Figure 1 As shown, the ambient light driving chip 100 may include: an ambient light driving module 110, a CAN communication module 120 and a control module 130. The control module 130 is connected to the CAN communication module 120 and the ambient light driving module 110 respectively.

[0039] Among them, the CAN communication module 120 can be used to receive an atmosphere light display request and transmit the request to the control module 130. In one example, the atmosphere light display request can be decoded based on the CAN protocol to obtain request data, and the request data can be transmitted to the control module 130. The control module 130 can be used to respond to the display request and output a control instruction to the atmosphere light driving module 110. The atmosphere light driving module 110 drives the atmosphere light 200 for display according to the control instruction.

[0040] In this embodiment, the input end of the control module 130 can be connected to the output end of the CAN communication module 120, and the output end of the control module 130 can be connected to the input end of the atmosphere light driving module 110. The input end of the CAN communication module 120 serves as the input end of the atmosphere light driving chip 100 to receive the atmosphere light display request. The output end of the atmosphere light driving module 110 serves as the output end of the atmosphere light driving chip 100 and is connected to the atmosphere light 200.

[0041] In this embodiment, the CAN communication module 120 has two input terminals, namely, a high data bit terminal CANH and a low data bit terminal CANL for CAN communication. The ambient light driving chip 100 receives an ambient light display request input from the outside via the high data bit terminal CANH and the low data bit terminal CANL.

[0042] The ambient light display request can be a request input by the user in the human-computer interaction interface, or it can be an intelligent interaction request for the entire vehicle, such as the color information of the ambient light intelligently identified based on the loudness of the music. The ambient light driver chip 100 can be connected to the CAN communication interface of the human-computer interaction interface via the CAN bus. The ambient light display request is obtained through the user's input operation in the human-computer interaction interface. The ambient light driver chip 100 can also be connected to the intelligent identification system of the entire vehicle via the CAN bus. The information input by the intelligent identification system of the entire vehicle is used as the ambient light display request.

[0043] In this embodiment, the CAN communication module 120 may include a CAN PHY (Controller Area Network Physical Layer). The received ambient light display request is decoded through the CAN PHY. The CAN communication module 120 may be a CAN FD (CAN with Flexible Data rate), the communication rate can reach 5Mbit / s, suitable for a 12V bus system, and supports a low current Stand-by mode and a wake-up function.

[0044] In this embodiment, the atmosphere lamp driving module 110 can be used to drive the atmosphere lamp 200 with a constant current. By independently controlling the three paths R, G, and B in an atmosphere lamp 200 through a PWM wave, the magnitude of each path of current can be controlled, thereby achieving the adjustment of the color of the atmosphere lamp and the change of the brightness. The atmosphere lamp driving module 110 can control the maximum output current by adjusting the current limiting resistor, and can also control the threshold of the over-temperature protection of the atmosphere lamp driving chip through the temperature threshold resistor.

[0045] The ambient light driving module 110 may include three output terminals, each of which outputs a PWM wave, which is used to control the on and off of the R, G, and B channels of the ambient light 200 .

[0046] The ambient light driving module 110 may include a PWM unit and a driving unit. The driving unit may be used to drive the PWM unit to control the on / off, color change, and brightness adjustment of the ambient light 200.

[0047] As an example, the PWM unit may include a switch device and a resistor. The control module 130 controls the PWM unit to output a PWM wave, which can control the on and off of the atmosphere lamp 200. In conjunction with the driving module, by controlling the on and off of the R, G, and B channels of the atmosphere lamp and the frequency and duty cycle of the PWM wave, the color change and brightness adjustment of the atmosphere lamp can be controlled.

[0048] In this embodiment, the control module 130 may be an MCU (Microcontroller Unit), for example, an ARM M0 MCU. The operating frequency of the control module 130 may be 100 MHz. The control module 130 may communicate with the outside via CAN FD via CAN PHY, and perform constant current drive control on the atmosphere light driving module 110 via PWM. In addition, the control module 130 may also monitor the chip operating state and the load operating state according to the signal output by the signal acquisition module.

[0049] The embodiment of the present application integrates the atmosphere light driving module, CAN communication module and control module into one chip, which requires a small PCB board space, has high integration and low cost. Moreover, when using the highly integrated atmosphere light driving chip of this embodiment to design an atmosphere light solution, only a small amount of peripheral circuits need to be added. In this way, the circuit design can be simplified and the stability and reliability of the circuit can be improved.

[0050] In addition, compared with the existing solution that only supports LIN communication, the ambient light driver chip of this embodiment supports CAN communication, has high communication efficiency, can support higher data transmission rates, and is suitable for application scenarios that require the transmission of large amounts of data or have high real-time requirements. Moreover, due to the addition of the CAN communication module, the chip of the embodiment of the present application can support multiple ECUs (Electronic Control Units) to communicate simultaneously, which is more conducive to systematic integration. At the same time, it has strong anti-interference capabilities and error detection mechanisms, and has high flexibility and scalability.

[0051] In some embodiments, Figure 2 As shown, the ambient light driver chip 100 of the embodiment of the present application may further include an enabling driver module 140. The input end of the enabling driver module 140 is connected to the control module 130, and the output end of the enabling driver module 140 is used to connect to the second end of the ambient light 200 to provide an enabling signal for the ambient light 200.

[0052] In this embodiment, after receiving the display request of the atmosphere lamp 200 input by the CAN communication module 120, the control module 130 outputs an enable control instruction to the enable drive module 140. In response to the enable control instruction, the enable drive module 140 provides an enable signal for the atmosphere lamp 200. As an example, the control module can output the enable control instruction to the enable drive module 140 through a GPIO (General-Purpose Input / Output).

[0053] In this embodiment, the enable signal may be a high level signal or a low level signal. The high level signal may be used to control the ambient light 200 to light up, and the low level signal may be used to control the ambient light 200 to turn off.

[0054] In this embodiment, the output end of the atmosphere lamp driving module 110 can be used to connect to the first end of the atmosphere lamp 200. When the enable signal is at a low level, there is no need to control the atmosphere lamp driving module 110 to output a PWM wave. When the enable signal is at a high level, the atmosphere lamp driving module 110 is controlled to output a PWM wave to control the color change, brightness adjustment, etc. of the atmosphere lamp 200.

[0055] In this embodiment, the enabling driving module 140 may include a high-side driving switch, and the enabling driving module 140 controls the multiple atmosphere lamps 200 to display the flowing water effect through the high-side driving switch. By controlling the high-voltage load such as the atmosphere lamp through the high-side driving module, the enabling signal will not be output when a short-to-ground fault occurs, and the fault can be discovered in time.

[0056] The high-side drive switch may be a power element, such as NMOSFET (N-type Metal-Oxide-Semiconductor Field-Effect Transistor).

[0057] The ambient light driver chip of the embodiment of the present application integrates an enabling driver module, and no external driver module is required to control the on and off of the ambient light, making the subsequent ambient light system design simpler. In addition, the ambient light driver module is controlled to output a PWM wave only when the enabling signal is at a high level, thus achieving an energy-saving effect.

[0058] In some embodiments, Figure 3 As shown, the enabling driving module 140 may include a plurality of output terminals for connecting to the atmosphere lamps 200. The enabling driving module 140 may be used to control a plurality of atmosphere lamps 200 to display a flowing water effect.

[0059] In this embodiment, the enabling driving module 140 can output high level or low level through multiple output terminals through time-division multiplexing technology to control multiple atmosphere lights to display the flowing water effect.

[0060] In this embodiment, by enabling the driving module 140 , each atmosphere lamp 200 can be independently controlled to turn on and off, and the color of each atmosphere lamp 200 can also be independently controlled.

[0061] The number of output terminals of the enabling driving module 140 can be determined according to the requirement of the pipelining effect, which is not specifically limited here. As an example, the number of output terminals of the enabling driving module 140 can be greater than 5.

[0062] In one example, a steady-state output current of an output terminal of the driving module 140 is enabled to be greater than 150 mA.

[0063] The embodiment of the present application integrates the enabling driving module into the ambient light driving chip, which has a higher integration level. The embodiment can realize the flowing water effect of the ambient light only through the chip, without the need for external power components and driving modules, and the subsequent ambient light system design and operation is simpler and the cost is lower.

[0064] In some embodiments, Figure 4 As shown, the ambient light driving chip 100 of the embodiment of the present application may further include a signal acquisition module 150 . The signal acquisition module 150 is connected to the control module 130 .

[0065] In this embodiment, the signal acquisition module 150 can be used to collect at least any one of the following: the running state of the ambient light driving chip and the working state of the ambient light.

[0066] In this embodiment, the control module 130 can make feedback based on the operating status of the ambient light driver chip and the working status of the ambient light collected by the signal acquisition module 150. For example, when the current in the ambient light driver chip is too large, the control module 130 can make adjustments or take protective measures in time. For another example, when the ambient light driver chip fails, the control module 130 can send the fault information through the CAN communication module 120 so that the whole vehicle can identify the fault in time.

[0067] In some embodiments, Figure 4 As shown, the ambient light driving chip 100 of the embodiment of the present application may further include a power module 160. The power module 160 is used to provide power to the ambient light driving chip 100.

[0068] As an example, the power supply of the power module 160 can be divided into three parts. The first part is to power the ARM M0 MCU and CANPHY, with a supply voltage of 3.3V and a current of 100mA. The second part is to power the enable driver module 140, with a supply current of 150mA or more for each switch, and the number of high-side switches is greater than 5. The third part is to power the constant current drive part of the atmosphere lamp driver module 110.

[0069] In this embodiment, the power module 160 may include a power management unit and a voltage stabilizing unit connected to the power management unit. The voltage stabilizing unit is used to output a stable voltage. The voltage stabilizing unit may be, for example, an LDO (Low Dropout Regulator). The power management unit and the voltage stabilizing unit connected to the power management unit are used to supply power to each module of the atmosphere light driver chip.

[0070] In this embodiment, the external power supply of the power module 160 may be provided by, for example, a 12V power supply system.

[0071] In this embodiment, the power module 160 may further include a power-on reset unit. The power-on reset unit is connected to the power management unit. The power-on reset unit is used to provide a power-on reset function for the ambient light driving chip.

[0072] In some embodiments, the ambient light driving chip of the embodiment of the present application may further include a clock module. The clock module is used to generate a clock signal for the ambient light driving chip.

[0073] In this embodiment, the power module 160 can also provide power for the signal acquisition module 150 , the clock module, etc.

[0074] In this embodiment, the ambient light driving module 110 , the CAN communication module 120 , the control module 130 , the enabling driving module 140 , the signal acquisition module 150 , the power supply module 160 , etc. may be packaged using VQFN-32 packaging technology.

[0075] The ambient light driver chip of the embodiment of the present application has high integration, the subsequent ambient light system design is simpler, the required PCB board space is small, and the cost is lower.

[0076] The present application also provides an ambient light driving system. Figures 1 to 5 As shown, the ambient light driving system 1000 includes the ambient light driving chip 100 and the ambient light 200 as in the above-mentioned embodiment.

[0077] In some embodiments, the ambient light 200 may be connected between the enabling driving module 140 and the ambient light driving module 110 .

[0078] In some embodiments, there may be multiple atmosphere lamps 200, and the multiple atmosphere lamps 200 are connected in parallel between the high-side driver module 140 and the atmosphere lamp driver module 110. In this way, each atmosphere lamp can be controlled individually, and if one of the atmosphere lamps is damaged, it will not affect the normal lighting of other atmosphere lamps.

[0079] The ambient light driving system of the embodiment of the present application utilizes a highly integrated ambient light driving chip and only requires a small number of peripheral components to be implemented. The circuit design is simple, the required PCB board space is small, and the cost is low.

[0080] An embodiment of the present application also provides a vehicle, comprising an ambient light driving system as in the above embodiment.

[0081] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present application is defined by the appended claims.

Claims

1. An ambient light driver chip, characterized in that: include: Ambient light drive module, CAN communication module and control module, The control module is connected to the CAN communication module and the atmosphere light driving module respectively; Wherein, the CAN communication module is used to receive an ambient light display request and transmit the request to the control module; The control module is used to respond to the request and output a control instruction to the atmosphere light driving module; The atmosphere light driving module drives the atmosphere light to display according to the control instruction.

2. The chip according to claim 1, characterized in that: The atmosphere lamp driving module is used to be connected to the first end of the atmosphere lamp, The chip further comprises an enabling driving module, an input end of the enabling driving module is connected to the control module, and an output end of the enabling driving module is used to be connected to the second end of the atmosphere lamp to provide an enabling signal for the atmosphere lamp.

3. The chip according to claim 2, characterized in that: The enabling driving module includes a plurality of output terminals for connecting to the atmosphere lamp. Wherein, the enabling driving module is used to control the plurality of atmosphere lights to display the flowing water effect.

4. The chip according to claim 2, characterized in that: The enabling driving module includes a high-side driving switch, and the enabling driving module controls the plurality of the atmosphere lights to display a flowing water effect through the high-side driving switch.

5. The chip according to claim 1, characterized in that: It also includes a signal acquisition module, which is connected to the control module. Wherein, the signal acquisition module is used to collect at least any one of the following: the running state of the chip and the working state of the atmosphere light.

6. The chip according to claim 1, characterized in that: It also includes a power supply module, which is used to provide electrical energy to the chip.

7. An ambient light driving system, characterized in that: The method comprises the chip as claimed in any one of claims 1 to 6 and the atmosphere light.

8. The system according to claim 7, characterized in that The atmosphere lamp is connected between the high-side driving module and the atmosphere lamp driving module.

9. The system according to claim 8, characterized in that There are multiple atmosphere lights, and the multiple atmosphere lights are connected in parallel.

10. A vehicle, characterized in that: Comprising the system as claimed in claim 7.

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