LOGO lamp electronic system for automobile

Abstract

The invention provides a LOGO lamp electronic system for an automobile. The LOGO lamp electronic system comprises an anti-reverse-connection and filtering module and a control module, wherein the anti-reverse-connection and filtering module is used for preventing a reverse power supply from damaging the whole system and filtering noise ripples or transient surge voltage from the whole automobile; the LOGO lamp LED driving module is connected with the anti-reverse connection and filtering module; the LOGO lamp LED module is connected with the LOGO lamp LED driving module; the system basic chip SBC is connected with the LOGO lamp LED driving module and the touch sensing chip; the touch sensing chip is connected with the system basic chip SBC, senses the capacitance change of an external electrode through a capacitance sensing pin to realize touch sensing, feeds back a touch state to the whole vehicle, receives a lighting command sent by the whole vehicle and is responsible for UART communication control of LOGO lamp LED driving. According to the automobile LOGO lamp, the light emitting function of a traditional LOGO lamp is reserved, and the touch sensing function is creatively integrated on the basis, so that a user can interact with an automobile through simple touch actions, the user experience is improved, and the science and technology feeling and the modern feeling of the automobile are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile lamps, and in particular to an automobile LOGO lamp electronic system, and more particularly to an automobile LOGO lamp electronic system and a control architecture. Background Art

[0002] With the rapid development of the automotive industry, especially the accelerated advancement of automotive electrification, the design of front and rear LOGO lights has also ushered in new changes. Traditional LOGO lights mainly serve as decoration and identification, and usually do not have additional functions. However, as consumers' demand for automotive technology and intelligence increases, more and more automakers have begun to integrate electronic design into LOGO lights, enabling them to actively emit light, thereby enhancing the technological perception of the car on the user side.

[0003] In the invention document with the publication number CN109237344A, an intelligent suspension lamp based on wireless power supply is disclosed, including: a retractable lamp post, a lamp holder installed on the retractable lamp post, a lamp body, a power module, a wireless power supply module, an electromagnetic suspension module, an LED module, a voice sensing module, an infrared sensing module, a touch sensing module and a Bluetooth audio module; wherein: the power module and the wireless power supply module are used to provide wireless working power for the suspension lamp; the infrared sensing module is used to perform corresponding control on the suspension lamp based on the infrared sensing signal; the battery suspension module is used to control the suspension of the lamp body; the voice sensing module is used to perform corresponding control on the suspension lamp based on the voice signal; the touch sensing module is used to perform corresponding control on the suspension lamp based on the sensing signal; the Bluetooth audio module is used to realize the Bluetooth audio function; and the LED module is used to realize LED lighting. At present, the mainstream designs on the market have realized the lighting function of the LOGO lamp, but most of them still remain at a single lighting level and lack interactivity with users. This single-function LOGO lamp can no longer meet the current consumer demand for automobile intelligence, personalization and convenience.

[0004] Therefore, it is necessary to propose a new technical solution to improve the above technical problems. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide an electronic system for a LOGO light for an automobile.

[0006] According to the present invention, an automotive LOGO light electronic system includes: an anti-reverse connection and filtering module, a LOGO light LED driving module, a LOGO light LED module, a system basic chip SBC and a touch sensing chip;

[0007] The anti-reverse connection and filtering module is used to prevent the reverse power supply from damaging the entire system and filter out noise ripples or transient surge voltages from the vehicle;

[0008] The LOGO light LED driving module is connected to the anti-reverse connection and filtering module to provide a stable current output for the LOGO light LED module;

[0009] The LOGO light LED module is connected to the LOGO light LED driving module to realize the luminous Logo function;

[0010] The system basic chip SBC is connected to the LOGO light LED driving module and the touch sensing chip, and is used to provide a stable operating voltage for the touch sensing chip and perform CAN physical layer level conversion;

[0011] The touch sensing chip is connected to the system basic chip SBC, senses the capacitance change of the external electrode through the capacitive sensing pin to realize touch perception, and feeds back the touch status to the whole vehicle. At the same time, it receives the lighting command sent by the whole vehicle and is responsible for the UART communication control of the LOGO light LED drive.

[0012] Preferably, the system further comprises a touch control PCBA circuit board, and the anti-reverse connection and filtering module, the LOGO light LED driving module, the system basic chip SBC and the touch sensing chip are all arranged on the touch control PCBA circuit board.

[0013] Preferably, the system further comprises a touch sensing PCBA circuit board for arranging touch sensing electrodes, and the touch sensing electrodes transmit capacitance changes caused by touch to the touch control PCBA circuit board.

[0014] Preferably, the touch sensing chip can identify different key modes, including long press, short press, double press, light touch and heavy touch, and feed back the different key modes to the whole vehicle through the CAN communication protocol.

[0015] Preferably, the LOGO light LED driving module can also control the LOGO light LEDs to achieve lighting effects of lighting up one by one and gradually lighting up and extinguishing according to the UART communication protocol instructions sent by the touch sensing chip.

[0016] Preferably, the system basis chip SBC converts the CAN communication protocol of 5V level logic into CAN_H and CAN_L signals and transmits them to the whole vehicle, completing information interaction with the whole vehicle.

[0017] Preferably, the anti-reverse connection and filtering module includes a diode D1, a bidirectional breakdown diode D2, a capacitor C1, a capacitor C2, a capacitor C3, and an inductor FB1;

[0018] The anode of the diode D1 is respectively connected to one end of the bidirectional breakdown diode D2, one end of the capacitor C1 and the voltage source VBAT; the cathode of the diode D1 is respectively connected to one end of the capacitor C2 and one end of the inductor FB1; the other end of the bidirectional breakdown diode D2 is grounded, the other end of the capacitor C1 is grounded, the other end of the capacitor C2 is grounded, the other end of the inductor FB1 is respectively connected to one end of the capacitor C3 and the voltage source VBAT_REV, and the other end of the capacitor C3 is grounded.

[0019] Preferably, light touch and heavy touch can be determined by identifying different signal threshold values. The actual digital signal value is collected through light touch and heavy touch of the finger according to the physical object and updated into the touch chip as a calibration parameter. The software in the touch chip compares the actual touch digital signal with the threshold. When it is lower than the light touch threshold, it is determined as no key is pressed. When it is between the light touch and heavy touch thresholds, it is determined as a light touch press. When it is greater than the heavy touch threshold, it is determined as a heavy touch press.

[0020] Preferably, the long press time threshold is determined to be 500ms. The software starts timing when it detects that the change in digital signal caused by touch exceeds the threshold. When the key digital signal is monitored to be higher than the threshold for 500ms continuously, it is determined that a long press has occurred. If the software detects that the key exceeds the threshold and is lower than the threshold twice in a row within 500ms, it is determined that a double-click has occurred. The judgment threshold of 500ms is a typical value, and the actual value is calibrated through physical testing.

[0021] Preferably, the anti-reverse connection in the anti-reverse connection and filtering module prevents the reverse power supply from damaging the entire system. When the power polarity is correct, the current can flow smoothly into the circuit, and when the power polarity is wrong, the current is blocked; filtering refers to filtering out the excessive electrical stress caused by the noise ripple or transient surge voltage from the entire vehicle.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention not only retains the lighting function of the traditional LOGO light, but also creatively integrates the touch sensing function on this basis, so that users can interact with the vehicle through simple touch actions, improving the user experience and enhancing the technological and modern sense of the car;

[0024] 2. The touch sensing function of the present invention can recognize various touch modes of users (such as long press, short press, double press, light touch, heavy touch, etc.), and convert these touch signals into vehicle control instructions, providing users with a more convenient and rich vehicle control experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 Schematic diagram of a finger placed on a touch electrode;

[0028] Figure 3 This is a schematic diagram of the change of capacitance value over time when the button is pressed;

[0029] Figure 4 Circuit diagram for reverse connection prevention and filtering module;

[0030] Figure 5 This is the circuit diagram of the LOGO light LED driver module. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0032] Embodiment 1:

[0033] Reference Figure 1 According to the present invention, an automotive LOGO light electronic system includes: an anti-reverse connection and filtering module, a LOGO light LED driving module, a LOGO light LED module, a system basic chip SBC and a touch sensing chip; the anti-reverse connection and filtering module is used to prevent the reverse power supply from damaging the entire system and filter out the noise ripple or transient surge voltage from the entire vehicle; the LOGO light LED driving module is connected to the anti-reverse connection and filtering module to provide a stable current output for the LOGO light LED module; the LOGO light LED module is connected to the LOGO light LED driving module to realize the luminous Logo function; the system basic chip SBC is connected to the LOGO light LED driving module and the touch sensing chip to provide a stable working voltage for the touch sensing chip and perform CAN physical layer level conversion;

[0034] The touch sensing chip is connected to the system basic chip SBC, senses the capacitance change of the external electrode through the capacitive sensing pin to realize touch perception, and feeds back the touch status to the whole vehicle. At the same time, it receives the lighting command sent by the whole vehicle and is responsible for the UART communication control of the LOGO light LED drive.

[0035] The system also includes a touch control PCBA circuit board, on which the anti-reverse connection and filtering module, the LOGO light LED driver module, the system basic chip SBC and the touch sensing chip are all placed. The system also includes a touch sensing PCBA circuit board, which is used to place touch sensing electrodes, and the touch sensing electrodes transmit the capacitance change caused by touch to the touch control PCBA circuit board.

[0036] The touch sensing chip can identify different key modes, including long press, short press, double press, light touch and heavy touch, and feedback the different key modes to the vehicle through the CAN communication protocol. The LOGO light LED driver module can also control the LOGO light LED to achieve the lighting effect of lighting up one by one and gradually turning on and off according to the UART communication protocol instructions sent by the touch sensing chip.

[0037] Reference Figure 4 and Figure 5 , the system basic chip SBC converts the CAN communication protocol of 5V level logic into CAN_H and CAN_L signals and transmits them to the whole vehicle, completing information exchange with the whole vehicle. The anti-reverse connection and filtering module includes a diode D1, a bidirectional breakdown diode D2, a capacitor C1, a capacitor C2, a capacitor C3, and an inductor FB1; the positive electrode of the diode D1 is respectively connected to one end of the bidirectional breakdown diode D2, one end of the capacitor C1 and the voltage source VBAT; the negative electrode of the diode D1 is respectively connected to one end of the capacitor C2 and one end of the inductor FB1; the other end of the bidirectional breakdown diode D2 is grounded, the other end of the capacitor C1 is grounded, the other end of the capacitor C2 is grounded, the other end of the inductor FB1 is respectively connected to one end of the capacitor C3 and the voltage source VBAT_REV, and the other end of the capacitor C3 is grounded.

[0038] By identifying different signal thresholds, light touch and heavy touch can be determined. The actual digital signal value is collected through light touch and heavy touch of the finger according to the physical object and updated to the touch chip as a calibration parameter. The software in the touch chip will compare the actual touch digital signal with the threshold. When it is lower than the light touch threshold, it is determined as no button is pressed. When it is between the light touch and heavy touch thresholds, it is determined as a light touch press. When it is greater than the heavy touch threshold, it is determined as a heavy touch press.

[0039] The long press time threshold is 500ms. The software starts timing when it detects that the change in digital signal caused by touch exceeds the threshold. When the key digital signal is monitored to be higher than the threshold for 500ms, it is determined that the key is long pressed. If the software detects that the key exceeds the threshold and is lower than the threshold twice in a row within 500ms, it is determined that a double-click has occurred. The judgment threshold of 500ms is a typical value, and the actual value is calibrated through physical testing.

[0040] The reverse connection protection and filtering module prevents the reverse power supply from damaging the entire system. When the power polarity is correct, the current can flow into the circuit smoothly, and when the power polarity is wrong, the current is blocked; filtering refers to filtering out the excessive electrical stress caused by the noise ripple or transient surge voltage from the whole vehicle.

[0041] Embodiment 2:

[0042] On this basis, the present invention adopts an electronic system architecture design that is different from conventional LOGO lights, so that the LOGO light can not only meet the lighting function and regulatory lighting requirements, but also have a touch sensing function. That is, when a user touches the LOGO light, it can be sensed by the electronic system and converted into a signal and transmitted to the entire vehicle, thereby realizing user interaction functions, such as opening the door, trunk, or starting a light show, accompany me home, etc.

[0043] The present invention aims to provide an electronic system architecture design for the front and rear LOGO lights of automobiles with two functions: luminous LOGO and touch sensing, so that the LOGO lights can realize a novel design function different from the past. It improves the difference of the products, makes it easier to attract end consumers, and provides a better user experience. There is no such design on the market at present, which belongs to innovative design, including:

[0044] (1) Anti-reverse connection and filtering module: Anti-reverse connection refers to preventing the reverse power supply from damaging the entire system. When the power polarity is correct, the current can flow smoothly into the circuit, and when the power polarity is wrong, the current is blocked, thereby protecting the subsequent modules from damage. Filtering refers to filtering out the excessive electrical stress caused by noise ripple or transient surge voltage from the entire vehicle to avoid damage to the subsequent modules.

[0045] (2) LOGO light LED driver: A smart LED chip for automobiles. On the one hand, it receives power from the anti-reverse connection and filtering module, and on the other hand, it provides a stable current output for the LOGO light LED module to ensure that the brightness of the LOGO light is stable and meets the standard requirements. At the same time, the LOGO light LED driver module will also communicate with the touch sensor chip through the UART communication protocol. The touch sensor chip module will send UART communication protocol instructions to the LOGO light LED driver module in the expected scenario to control the LOGO light LED to achieve lighting effects such as lighting up one by one, gradually lighting up and gradually fading out.

[0046] (3) LOGO light LED: An ordinary light-emitting diode that receives a stable current from the LOGO light LED driver to emit light, thus realizing the luminous logo function.

[0047] (4) System Basic Chip SBC: An integrated chip that integrates communication, power supply and other functions. On the one hand, SBC is responsible for providing a stable 5V operating voltage for the touch sensing chip, and on the other hand, it provides CAN physical layer level conversion for the touch sensing chip. It converts the CAN communication protocol of 5V level logic into CAN_H and CAN_L signals and transmits them to the whole vehicle, completing information exchange with the whole vehicle.

[0048] (5) Touch sensor chip: Under the 5V stable power supply of the system basic chip SBC, the touch sensing is realized by sensing the capacitance change of the external electrode through the dedicated capacitive sensing pin, and the touch status is fed back to the whole vehicle through the CAN communication protocol. On the other hand, it receives the lighting command sent by the whole vehicle through the CAN communication protocol and is responsible for the UART communication control of the LOGO light LED driver.

[0049] The above modules (1) to (5) constitute the entire electronic system architecture of the Logo light, and all modules are placed on a circuit board called touch control PCBA.

[0050] In addition, there is a touch sensing PCBA, which is used to place touch sensing electrodes. The electrodes transmit the capacitance changes caused by touch to the touch control PCBA to achieve touch perception.

[0051] Introduction to touch sensing chip: The touch sensing chip senses the capacitance change of the touch electrode through the capacitor pin, identifies different key modes (long press, short press, double press, light touch, heavy touch, etc.), and feeds back the different key modes to the vehicle through the CAN communication protocol. The vehicle can respond to these key modes and perform different vehicle-side responses. (Turn on the light show, turn on or off the accompany me home function, open the tailgate, etc.).

[0052] At the same time, according to different buttons, the LOGO light can achieve lighting effects such as gradual on and off, short flashing, etc., responding to the button operation as feedback. This control logic can be directly completed by the program inside the touch sensing chip. The touch sensing chip can also receive the LOGO light control requirements from the vehicle through the CAN communication protocol to achieve normal luminous LOGO function (lighting and closing).

[0053] How to identify key operation through capacitance change: Figure 2 and Figure 3 When you place your finger on the touch electrode, the capacitance of the system increases, and the touch sensing chip charges the sensing capacitance on the touch electrode through the touch pin and generates a voltage. The touch sensing chip converts the voltage analog signal into a digital signal, such as Figure 3 As shown, when the digital signal becomes larger, it means that a key is pressed.

[0054] Regarding how to identify different key modes, different algorithms and calibration parameters are needed to achieve this.

[0055] The changes in the inductive capacitance when the finger touches lightly and touches hard are different, so the converted digital signal values ​​are also different. By identifying different signal thresholds, light touch and heavy touch can be determined. The threshold is related to the size of the touch electrode, the distance of the touching finger, etc. When applied, the actual digital signal value will first be collected through the light touch and heavy touch of the finger according to the physical object and updated to the touch chip as a calibration parameter. Then the software in the touch chip will compare the actual touch digital signal with the threshold. When it is lower than the light touch threshold, it is determined that no key is pressed. When it is between the light touch and heavy touch thresholds, it is determined that it is a light touch. When it is greater than the heavy touch threshold, it is determined that it is a heavy touch. In addition, in order to avoid false touches, some filtering algorithms will be executed to avoid misjudgment of keys, such as median filtering, average filtering, hysteresis filtering, etc.

[0056] Long press, short press and double press have different distribution of capacitance change time within a certain period of time. The chip can monitor the signal change time caused by capacitive touch to determine these three different key modes. Generally, the long press time threshold is 500ms. The software starts timing when it detects that the digital signal change caused by touch exceeds the threshold. When the key digital signal is always monitored to be higher than the threshold for 500ms, it can be determined that a long press has occurred. Similarly, if the software detects that the key exceeds the threshold and is lower than the threshold twice in a row within 500ms, it can be determined that a double press has occurred. The judgment threshold of 500ms is a typical value, and the actual value can be calibrated through physical testing. In addition, similar to the light touch and heavy touch judgment, the application of filtering algorithms such as median filtering, average filtering, and hysteresis filtering is also necessary to avoid misjudgment of keys.

[0057] The present invention adopts this electronic architecture to realize the luminous logo, and adds the interaction function between the user and the whole vehicle through touch perception, thereby realizing a novel design function.

[0058] The user can touch the rear logo light, and after the above electronic system sends the signal to the whole vehicle, the whole vehicle can respond by opening the tailgate. The user can touch the front logo light, and after the above electronic system sends the signal to the whole vehicle, the whole vehicle can respond by triggering a light show effect or actively turning on or off the "accompany me home" function (referring to the turning on and off of the low beam) in advance. The above electronic system architecture supports sensing the size and duration of capacitance changes caused by touch, and identifies different trigger signals such as long press, short press, double press, light touch, and heavy touch. After the above electronic system sends the signal to the whole vehicle, the whole vehicle can set up the mapping of any or multiple functions mentioned above in the central control to achieve flexible and free configuration on the user side. For example: a light press can control the light on and off, a heavy press can open the tailgate, and so on.

[0059] Those skilled in the art may understand this embodiment as a more specific description of Embodiment 1.

[0060] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0061] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An automotive LOGO light electronic system, characterized in that: include: Anti-reverse connection and filtering module, LOGO light LED driver module, LOGO light LED module, system basic chip SBC and touch sensor chip; The anti-reverse connection and filtering module is used to prevent the reverse power supply from damaging the entire system and filter out noise ripples or transient surge voltages from the vehicle; The LOGO light LED driving module is connected to the anti-reverse connection and filtering module to provide a stable current output for the LOGO light LED module; The LOGO light LED module is connected to the LOGO light LED driving module to realize the luminous Logo function; The system basic chip SBC is connected to the LOGO light LED driving module and the touch sensing chip, and is used to provide a stable operating voltage for the touch sensing chip and perform CAN physical layer level conversion; The touch sensing chip is connected to the system basic chip SBC, senses the capacitance change of the external electrode through the capacitive sensing pin to realize touch perception, and feeds back the touch status to the whole vehicle. At the same time, it receives the lighting command sent by the whole vehicle and is responsible for the UART communication control of the LOGO light LED drive.

2. The automotive LOGO light electronic system according to claim 1, characterized in that: The system also includes a touch control PCBA circuit board, and the anti-reverse connection and filtering module, the LOGO light LED driving module, the system basic chip SBC and the touch sensing chip are all placed on the touch control PCBA circuit board.

3. The automotive LOGO light electronic system according to claim 2, characterized in that: The system further comprises a touch sensing PCBA circuit board for arranging touch sensing electrodes, and the touch sensing electrodes transmit capacitance changes caused by touch to the touch control PCBA circuit board.

4. The automotive LOGO light electronic system according to claim 1, characterized in that: The touch sensing chip can identify different key modes, including long press, short press, double press, light touch and heavy touch, and feed back the different key modes to the whole vehicle through the CAN communication protocol.

5. The automotive LOGO light electronic system according to claim 1, characterized in that: The LOGO light LED driving module can also control the LOGO light LED to achieve lighting effects of lighting up one by one and gradually turning on and off according to the UART communication protocol instructions sent by the touch sensing chip.

6. The automotive LOGO light electronic system according to claim 1, characterized in that: The system basic chip SBC converts the CAN communication protocol of 5V level logic into CAN_H and CAN_L signals and transmits them to the whole vehicle, completing information exchange with the whole vehicle.

7. The automotive LOGO light electronic system according to claim 1, characterized in that: The anti-reverse connection and filtering module includes a diode D1, a bidirectional breakdown diode D2, a capacitor C1, a capacitor C2, a capacitor C3, and an inductor FB1; The positive electrode of the diode D1 is respectively connected to one end of the bidirectional breakdown diode D2, one end of the capacitor C1 and the voltage source VBAT; the negative electrode of the diode D1 is respectively connected to one end of the capacitor C2 and one end of the inductor FB1; the other end of the bidirectional breakdown diode D2 is grounded, the other end of the capacitor C1 is grounded, the other end of the capacitor C2 is grounded, the other end of the inductor FB1 is respectively connected to one end of the capacitor C3 and the voltage source VBAT_REV, and the other end of the capacitor C3 is grounded.

8. The automotive LOGO light electronic system according to claim 4, characterized in that: By identifying different signal thresholds, light touch and heavy touch can be determined. The actual digital signal value is collected through light touch and heavy touch of the finger according to the physical object and updated to the touch chip as a calibration parameter. The software in the touch chip will compare the actual touch digital signal with the threshold. When it is lower than the light touch threshold, it is determined as no button is pressed. When it is between the light touch and heavy touch thresholds, it is determined as a light touch press. When it is greater than the heavy touch threshold, it is determined as a heavy touch press.

9. The automotive LOGO light electronic system according to claim 4, characterized in that: The long press time threshold is 500ms. The software starts timing when it detects that the change in digital signal caused by touch exceeds the threshold. When the key digital signal is monitored to be higher than the threshold for 500ms, it is determined that the key is long pressed. If the software detects that the key exceeds the threshold and is lower than the threshold twice in a row within 500ms, it is determined that a double-click has occurred. The judgment threshold of 500ms is a typical value, and the actual value is calibrated through physical testing.

10. The automotive LOGO light electronic system according to claim 1, characterized in that: The anti-reverse connection and filtering module in the anti-reverse connection refers to preventing the reverse power supply from damaging the entire system. When the power polarity is correct, the current can flow into the circuit smoothly, and when the power polarity is wrong, the current is blocked; filtering refers to filtering out the excessive electrical stress caused by the noise ripple or transient surge voltage from the entire vehicle.

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