A multifunctional integrated control system for automobile ceiling lights

Abstract

The present invention discloses a multifunctional integrated control system based on a car dome light, including a car dome light MCU, which is connected to a car ECU, and a power module is connected to the car dome light MCU; a touch button circuit is connected to the touch button input end of the car dome light MCU, and a reading light indication module, an alarm module, a key background light indication module, a seat belt and airbag indication module, and an atmosphere light module are connected to the control output end of the car dome light MCU; the power module supplies power to the reading light indication module, the alarm module, the key background light indication module, the seat belt and airbag indication module, and the atmosphere light module. Beneficial effects: large-scale processing and installation to form a set of equipment, which is installed on the car as a whole and can be removed as a whole during maintenance without interference between lines. The wiring is standardized, and the fault point is easy to find.

Description

Technical Field

[0001] The invention relates to the technical field of automobile ceiling lights, in particular to a multifunctional integrated control system for automobile ceiling lights. Background Art

[0002] The top of the car interior contains a variety of functional modes. In the existing technology, most of them are designed in a decentralized and independent layout. However, with the increase of design functions, the modules are diversified, and they are processed by independent microprocessors MCU, which are decentralized and connected to the car master controller ECU. Due to the large number of design functions, the connection ports are not enough. Based on the above defects, technicians designed a multi-to-one connection of the master controller ECU with a connector. When multiple functional modules send control requests at the same time, signal conflicts are likely to occur, resulting in control errors of the master controller ECU. In addition, the line layout is complex, easy to interfere with each other, poor reliability, decentralized layout, and difficult to disassemble and assemble. Summary of the invention

[0003] In view of the above problems, the present invention provides a multifunctional integrated control system for automobile ceiling lights, which integrates the reading light indication module, alarm module, key background light indication module, seat belt and airbag indication module, and atmosphere light module on the top of the automobile, is easy to disassemble and assemble, and has powerful functions.

[0004] In order to achieve the above object, the specific technical solution adopted by the present invention is as follows:

[0005] A multifunctional integrated control system for a car dome light comprises a car dome light MCU, which is connected to a car ECU. The key technology thereof lies in that: a power supply module is connected to the car dome light MCU; a touch key circuit is connected to the touch key input end of the car dome light MCU, and a reading light indication module, an alarm module, a key background light indication module, a seat belt and airbag indication module, and an atmosphere light module are connected to the control output end of the car dome light MCU; and the power supply module supplies power to the reading light indication module, the alarm module, the key background light indication module, the seat belt and airbag indication module, and the atmosphere light module.

[0006] Among them, the touch button circuit is a capacitive touch circuit, which is at least equipped with a touch shield button, an SOS alarm button, a front left reading light button, a front right reading light button, a reading light full light button, and a BCALL alarm button. Through the above design, the reading light indication module, the alarm module, the button backlight indication module, the seat belt and airbag indication module, and the atmosphere light module are integrated and arranged on the top of the car to form an integrated system, and the corresponding power supply module is arranged for the system to supply power separately, with an integrated design, easy installation and processing.

[0007] Furthermore, the power module includes a power regulation module, a power conversion module, and a power drive output module; the power end of the power regulation module obtains the car power supply, the VS output end of the power regulation module is connected to the power drive output module and the power conversion module, and the reading light indication module, the alarm module, the key backlight indication module, the seat belt and airbag indication module are powered by the VS output end; the VS-MCU output end of the power regulation module supplies power to the car ceiling light MCU in sleep mode; a diode D1 is provided in the power regulation module, which The anode of the diode D1 serves as the Power end of the power supply regulating module, the cathode of the diode D1 is connected to one end of the bidirectional voltage regulator diode TVS1, and one end of the bidirectional voltage regulator diode TVS1 serves as the VS output end of the power supply regulating module. The anode of the diode D1 is also grounded through capacitors C27 and C28, and the other end of the bidirectional voltage regulator diode TVS1 is grounded. The cathode of the diode D1 is also connected to the positive electrode of the polarity capacitor CE1, and the negative electrode of the polarity capacitor CE1 is grounded. The cathode of the diode D1 is also connected to one end of the inductor FB9, and the other end of the inductor FB9 serves as the VS MCU output end, one end of the inductor FB9 is grounded via capacitor C25, and the other end of the inductor FB9 is grounded via capacitor C26; the power conversion module is connected to the sleep mode control end of the car ceiling light MCU, and the 12V AD output end of the power conversion module supplies power to the car ceiling light MCU in wake-up mode; the power conversion module includes a PNP transistor Q1, the emitter of the transistor Q1 serves as the VS input end of the power conversion module, a resistor R15 is connected between the base and the emitter of the transistor Q1, the base of the transistor Q1 is also connected to the collector of the impedance transistor Q5 via resistor R20, the base of the impedance transistor Q5 serves as the Sleep_Mode ctr input end of the power conversion module, the base of the impedance transistor Q5 is also grounded via capacitor C65, the collector of the transistor Q1 is connected to one end of the resistor R5 via resistor R6, and the other end of the resistor R5 serves as the 12V AD output end, the other end of the resistor R5 is also grounded via capacitor C53, one end of the resistor R5 is grounded via capacitor C6, and one end of the resistor R5 is also grounded via resistor R10; the power drive output module is connected to the sleep mode control end of the car ceiling light MCU, and the RRL output end of the power drive output module is used to supply power to the rear reading lights of the car;The power drive output module includes a PNP transistor Q23 and an impedance transistor Q14. The emitter of the transistor Q23 is connected to one end of a resistor R32, and the other end of the resistor R32 is used as a VS input terminal. One end of the resistor R32 is also grounded via a capacitor C87. A resistor R19 is also connected between the emitter of the transistor Q23 and the base of the transistor Q23. The collector of the transistor Q23 is connected to one end of a varistor FS1, and the other end of the varistor FS1 is used as an RRL output terminal. The base of the transistor Q23 is connected to the collector of the impedance transistor Q14 via a resistor R116. The base of the impedance transistor Q14 is used as the Sleep_Mode ctr input terminal of the power drive output module, and the emitter of the impedance transistor Q14 is grounded. ;

[0008] The above solution uses the touch button to wake up the MCU, avoiding unnecessary energy consumption when the ceiling light is not needed, reducing the battery load, improving the battery utilization rate and usage time, and making the ceiling light system more intelligent in low power mode. The MCU is only powered by the VS MCU in sleep mode. The MCU does not send any control signal in sleep mode, and other working modules connected to it remain in sleep mode. After waking up, the 12V AD powers the MCU.

[0009] Furthermore, the reading light indication module includes a front left reading light drive display circuit, a front right reading light drive display circuit, a rear left reading light drive circuit, a rear left reading light lighting prompt circuit, a rear right reading light drive circuit, and a rear right reading light lighting prompt circuit; the front left reading light control output end of the car ceiling light MCU is connected to the front left reading light drive display circuit, the front right reading light control output end of the car ceiling light MCU is connected to the front right reading light drive display circuit, and the rear left reading light control output end of the car ceiling light MCU is connected to the rear The rear left reading light driving circuit includes an NPN transistor Q3, the collector of which is connected to one end of a resistor R14, one end of which is also grounded via a capacitor C23. The other end is used to connect the front left reading light control output end of the car ceiling light MCU; a capacitor C10 is connected between the collector and emitter of the NPN transistor Q3, the emitter of the NPN transistor Q3 is grounded, the collector of the NPN transistor Q3 is also connected to the base of the NPN transistor Q2, the emitter of the NPN transistor Q2 is grounded via a resistor R17, the base of the NPN transistor Q3 is connected to the emitter of the NPN transistor Q2, the collector of the NPN transistor Q2 is connected to the cathode of the light-emitting diode LED1, and the light-emitting diode L The anode of ED1 is connected to the VS output end of the power module via a parallel resistor composed of resistors R17, R9 and R11, and capacitor C7 is also connected in parallel at both ends of the light-emitting diode LED1; the capacitance of the capacitor C23 is 10nF; the front right reading light drive display circuit includes an NPN transistor Q6, the collector of the NPN transistor Q6 is connected to one end of the resistor R13, one end of the resistor R13 is also grounded via capacitor C22, and the other end of the resistor R13 is used to connect to the front right reading light control output end of the car ceiling light MCU;A capacitor C11 is connected between the collector and emitter of the NPN transistor Q6, the emitter of the NPN transistor Q6 is grounded, the collector of the NPN transistor Q6 is also connected to the base of the NPN transistor Q4, the emitter of the NPN transistor Q4 is grounded via a resistor R43, the base of the NPN transistor Q6 is connected to the emitter of the NPN transistor Q4, the collector of the NPN transistor Q4 is connected to the cathode of the light-emitting diode LED17, the anode of the light-emitting diode LED17 is connected to the VS output end of the power module via a parallel resistor composed of resistors R1, R2 and R3, and capacitor C1 and resistor R8 are connected in parallel at both ends of the light-emitting diode LED17; the capacitance of the capacitor C22 is 10nF; the rear left reading drive circuit includes a resistor transistor Q32 The collector of the resistor transistor Q32 is connected to one end of the resistor R28, and the other end of the resistor R28 is connected to the rear left reading light control output end of the car ceiling light MCU. The emitter of the resistor transistor Q32 is grounded, and the base of the resistor transistor Q32 is connected to one end of the resistor R12. The other end of the resistor R12 is grounded via a capacitor C15, and the other end of the resistor R12 serves as the driving end of the rear left reading drive circuit; the capacitance of the capacitor C15 is 10nF; the rear left reading light lighting prompt circuit includes a diode D2, and the cathode of the diode D2 serves as the collection end of the rear left reading light lighting prompt circuit. The cathode of the diode D2 is also grounded via a capacitor C46, ​​and the anode of the diode D2 is grounded via a capacitor C44. The anode of the diode D2 is also connected to the power supply VCC via a resistor R78. 3V3, the anode of the diode D2 is connected to one end of the resistor R79, the other end of the resistor R79 is grounded via the capacitor C45, and the other end of the resistor R79 is also connected to the rear left reading light lighting feedback end of the car ceiling light MCU; the rear right reading drive circuit includes a resistor transistor Q31, the collector of the resistor transistor Q31 is connected to one end of the resistor R27, the other end of the resistor R27 is connected to the rear right reading light control output end of the car ceiling light MCU, the emitter of the resistor transistor Q31 is grounded, the base of the resistor transistor Q31 is connected to one end of the resistor R4, the other end of the resistor R4 is grounded via the capacitor C14, and the other end of the resistor R4 serves as the driving end of the rear right reading drive circuit; the capacitance of the capacitor C14 is 10nF;The rear right reading light lighting prompt circuit includes a diode D4, the cathode of which is used as the collection end of the rear right reading light lighting prompt circuit, the cathode of the diode D4 is also grounded via a capacitor C60, the anode of the diode D4 is grounded via a capacitor C61, the anode of the diode D4 is also connected to the power supply VCC 3V3 via a resistor R88, the anode of the diode D4 is connected to one end of a resistor R92, the other end of the resistor R92 is grounded via a capacitor C59, and the other end of the resistor R92 is also connected to the rear right reading light lighting feedback end of the car ceiling light MCU. ;

[0010] After the car ceiling light MCU key acquisition end obtains the key signal sent by the reading light touch key circuit, it drives the switch circuit in the car ceiling light MCU to light up the reading light connected to the corresponding key. In this solution, the rear reading lights and the front reading lights do not share the same MCU. When the front row is under touch switch control, the car ceiling light MCU sends a corresponding drive signal to the rear MCU, and after collecting the rear row MCU's lighting signal for the rear row reading lights, it determines whether the rear reading lights are lit. Based on the integrated top operation panel, the above solution arranges the front and rear row reading lights separately, and can also achieve synchronous control, and the car ceiling light MCU set inside the integrated panel can collect the lighting status of the rear row in real time and provide real-time feedback. At the same time, the driving circuit is set with a capacitance of 10nF, which reduces the capacitance value and eliminates the time difference when the front and rear reading lights are fully lit. Through the rear right reading light lighting prompt circuit and the rear left reading light lighting prompt circuit, the rear reading light lighting signal is collected in real time and real-time feedback is provided.

[0011] Furthermore, the alarm module includes an SOS switch circuit, an SOS display light circuit, a BCALL switch circuit, and a BCALL display light circuit; the SOS control output terminal SOS output ctr of the car ceiling light MCU is connected to the SOS switch circuit, the switch signal output terminal of the SOS switch circuit is connected to the car ECU, and the car ECU is connected to the SOS display light circuit; the BCALL control output terminal BCALL output ctr of the car ceiling light MCU is connected to the BCALL switch circuit, the switch signal output terminal of the BCALL switch circuit is connected to the car ECU, and the car ECU is connected to the BCALL display light circuit; the SOS switch circuit includes a resistor R114, one end of the resistor R114 is connected to the SOS control output terminal, one end of the resistor R114 is grounded after passing through a capacitor C125, and the other end of the resistor R114 is connected to the base of the eighth switch tube Q8, the eighth switch tube Q8 is an NPN type band-stop transistor Q8, and the emitter of the band-stop transistor Q8 is grounded, The collector of the band-block transistor Q8 is connected to one end of a resistor R73, and the other end of the resistor R73 serves as a switch signal output end of the SOS switch circuit; the collector of the band-block transistor Q8 is also grounded via a capacitor C101; the BCALL switch circuit includes a resistor R122, one end of which is connected to the BCALL control output end, the other end of which is grounded via a capacitor C126, and the other end of which is grounded via a capacitor C79; the other end of the resistor R122 is connected to the base of the ninth switch tube Q9, and the ninth switch tube Q9 is grounded via a capacitor C126. The nine-switch tube Q9 is an NPN type band-blocking transistor Q9, the emitter of the band-blocking transistor Q9 is grounded, the collector of the band-blocking transistor Q9 is connected to one end of a resistor R70, the other end of the resistor R70 serves as the switch signal output end of the BCALL switch circuit, and the collector of the band-blocking transistor Q9 is also grounded after passing through a capacitor C98; the other end of the resistor R70 is connected to one end of a protection diode ESD2, and the other end of the protection diode ESD2 is connected to the other end of the resistor R73; the other end of the resistor R70 is connected to the capacitor C80 The other end of the resistor R70 is connected to the other end of the resistor R73; the SOS display light circuit includes a diode D5, the anode of the diode D5 is connected to the SOS alarm display terminal of the automobile ECU, the anode of the diode D5 is grounded after passing through a capacitor C72, the cathode of the diode D5 is connected to the anode of the light-emitting diode LED7 after passing through a parallel resistor formed by connecting the resistor R82 and the resistor R138 in parallel, and the cathode of the light-emitting diode LED7 is grounded; the two ends of the light-emitting diode LED7 are connected in parallel with a resistor R83 and a capacitor C66;The BCALL display light circuit includes a diode D7, the anode of which is connected to the BCALL alarm display terminal of the automobile ECU, the anode of which is grounded after passing through a capacitor C50, the cathode of which is connected to the anode of a light emitting diode LED8 after passing through a resistor R86, and the cathode of which is grounded; a resistor R42 and a capacitor C77 are connected in parallel at both ends of the light emitting diode LED8.

[0012] Depending on the type of alarm, the SOS alarm function and the B CALL alarm function are set accordingly; the SOS alarm function is generally used for rescue of fire, medical, traffic police and other functions; the B CALL alarm is used for the user to set a custom phone number to dial an alarm or send an alarm signal. When the MCU receives the touch alarm signal, the output end of the MCU sends a high-level control signal to turn on the switch circuit for alarm. When the switch circuit is turned on, the indicator light in the display light circuit lights up, indicating that the alarm is successful, and an alarm rescue call is made at the same time.

[0013] Furthermore, the key background light indication module includes a key background light circuit, and the key background light circuit includes at least a left reading light key background light circuit, a reading light full-light touch key background light circuit and a right reading light key background light circuit; the left reading light key background light circuit includes a light emitting diode LED5, and the anode of the light emitting diode LED6 is connected to the VS output end of the power module through a resistor R49 and a resistor R51 connected in parallel; the VS output end is grounded through a capacitor C42; the cathode of the light emitting diode LED5 is connected to the collector of an NPN resistor transistor Q22, and the base of the NPN resistor transistor Q22 is connected to one end of a resistor R18, and the other end of the resistor R18 is connected to the left reading light button of the car ceiling light MCU. The key background light control output terminal ILL_LH_ctr, the resistor R18 and the NPN resistor transistor Q22 base common terminal are grounded through the capacitor C63, the other end of the resistor R18 is grounded through the capacitor C21, the emitter of the NPN resistor transistor Q22 is grounded, and the collector of the NPN resistor transistor Q22 is connected to the cathode of the light emitting diode LED5; the capacitor C24 and the resistor R109 are connected in parallel at both ends of the light emitting diode LED5; the reading light full-bright touch key background light circuit includes a light emitting diode LED6 and an NPN resistor transistor Q25, the anode of the light emitting diode LED6 is connected to the VS output terminal of the power module through the resistor R58 and the resistor R62 connected in parallel; the VS output terminal of the power module is connected to the VS output terminal of the power module through the capacitor C 42 is grounded; the base of the NPN resistor transistor Q25 is connected to one end of the resistor R21, the other end of the resistor R21 is connected to the reading light full light button background light control output terminal ILL_door_ctr of the car ceiling light MCU, the common end of the resistor R21 and the base of the NPN resistor transistor Q22 is grounded via a capacitor C64, the other end of the resistor R21 is grounded via a capacitor C29, the emitter of the NPN resistor transistor Q25 is grounded, and the collector of the NPN resistor transistor Q25 is connected to the cathode of the light emitting diode LED6; the two ends of the light emitting diode LED6 are connected in parallel with a capacitor C31 and a resistor R110; the right reading light button background light circuit includes a light emitting diode LED2, and the anode of the light emitting diode LED2 is connected to One end of a third voltage-dividing resistor formed by a resistor R40 and a resistor R41 connected in parallel is connected, and the other end of the third voltage-dividing resistor formed by a resistor R40 and a resistor R41 connected in parallel is connected to the collector of a PNP transistor Q10; the emitter of the PNP transistor Q10 is connected to the VS output end of the power module, the base of the PNP transistor Q10 is connected to the collector of a resistor transistor Q18 via a resistor R117, the emitter of the resistor transistor Q18 is grounded, the base of the resistor transistor Q18 is connected to the right reading light button background light control output end SWDCLK&ILL_RH_ctr of the car ceiling light MCU via a resistor R16, and the collector of the resistor transistor Q18 is connected to the VS output end of the power module via a resistor R115;The anode of the light emitting diode LED2 is connected to the emitter of the PNP transistor Q33, the collector of the PNP transistor Q33 is grounded, and the base of the PNP transistor Q33 is grounded via a resistor R118 and a capacitor C19; a resistor R119 is provided between the base and the emitter of the PNP transistor Q33. ;

[0014] A touch-type reading light button is set, and the button and panel are integrated; a background light is set on the button, and the brightness of the background light is adjusted to feedback whether the button is touched, so that the button position can be quickly found even in dim light. When no button is pressed, the background light is on, which is helpful for the operator to quickly find the button position of the reading light when the vehicle is in a poorly lit environment. When a button is pressed, the brightness of the background light changes, giving the operator a feedback signal that the button has been pressed. The touch-type button is integrated with the countertop, with a beautiful appearance, not easy to accumulate dust, and easy to clean.

[0015] Due to the large number of ports required, the right reading light button background light control output SWDCLK&ILL_RH_ctr of the car ceiling light MCU often has an instantaneous high pulse at the PWM adjustment end when the MCU is initialized, causing the light-emitting diode LED to flicker. This situation is a misoperation. In order to overcome the above defects, transistor Q33 and capacitor C19 are set. When a high pulse appears, the anti-flicker charging capacitor C19 starts to charge from no charge. At this time, the transistor Q33 is turned on to short-circuit the light-emitting diode LED, thereby preventing the problem of initialization high pulse flickering.

[0016] Furthermore, the seat belt and airbag indication module includes an airbag background light indication drive circuit, an airbag disable indication drive circuit, an airbag enable indication drive circuit, and a seat belt reminder drive circuit; the signal input end of the airbag background light indication drive circuit is used to connect to the airbag background light control output end of the car ceiling light MCU, and the drive output end of the airbag background light indication drive circuit is connected to the airbag background light indication circuit; the signal input end of the airbag disable indication drive circuit is used to connect to the airbag disable control output end of the car ceiling light MCU, and the drive output end of the airbag disable indication drive circuit is connected to the airbag disable indication circuit, and an airbag disable self-diagnosis point is provided between the airbag disable indication drive circuit and the airbag disable indication circuit, and the airbag disable self-diagnosis point is used to connect to the airbag disable diagnosis acquisition end of the car ceiling light MCU after passing through the airbag disable acquisition circuit. ; The signal input end of the airbag activation indication drive circuit is used to connect with the airbag activation control output end of the car dome light MCU, the drive output end of the airbag activation indication drive circuit is connected to the airbag activation indication circuit, an airbag activation self-diagnosis point is arranged between the airbag activation indication drive circuit and the airbag activation indication circuit, and the airbag activation self-diagnosis point is used to connect with the airbag activation diagnosis collection end of the car dome light MCU after passing through the airbag activation acquisition circuit; the signal input end of the seat belt reminder drive circuit is used to connect with the seat belt control output end of the car dome light MCU, the drive output end of the seat belt reminder drive circuit is connected to the seat belt reminder indication circuit, a seat belt reminder self-diagnosis point is arranged between the seat belt reminder drive circuit and the seat belt reminder indication circuit, and the seat belt reminder self-diagnosis point is used to connect with the seat belt reminder diagnosis collection end of the car dome light MCU after passing through the seat belt reminder acquisition circuit.

[0017] Based on the four indication states of airbag background light indication, airbag disabled indication, airbag enabled indication, and seat belt reminder indication, a driving indication circuit is set accordingly. In addition, voltage collection points are set in the three lines of airbag disabled indication, airbag enabled indication, and seat belt reminder indication respectively to obtain the line voltage in real time. Among them, the obtained voltage value is used to send to the corresponding ceiling light microcontroller for detection, comparison and judgment to obtain the current state of the line. Then, when a display fault occurs, the fault point and fault type can be obtained in combination with the line voltage value. For example, when the seat belt reminder circuit is broken, the corresponding indicator light does not light up, and the voltage value of the circuit changes. Then, the voltage value collected by the seat belt reminder collection circuit of the utility model can be used to obtain that the cause of the seat belt reminder indication fault is due to a display fault, rather than a fault in the seat belt itself.

[0018] Furthermore, the airbag background light indication driving circuit includes a resistor R104, one end of the resistor R104 serves as a signal input end of the airbag background light indication driving circuit, one end of the resistor R104 is also grounded via a capacitor C82, the other end of the resistor R104 is connected to the base of a resistor transistor Q13, the emitter of the resistor transistor Q13 is grounded, the collector of the resistor transistor Q13 is connected to the base of a PNP transistor Q38 via a resistor R89, the common end of the PNP transistor Q38 and the resistor R89 ​​is also connected to the VS output end of the power module via a resistor R84, and the emitter of the PNP transistor Q38 is connected to the VS output end of the power module The VS output end of the block, the collector of the PNP transistor Q38 is connected to one end of the resistor R29, the other end of the resistor R29 is grounded via the resistor R38 and the capacitor C35 respectively, and the other end of the resistor R29 also serves as the driving output end of the airbag background light indication driving circuit; the airbag background light indication circuit comprises a light emitting diode LED9, a light emitting diode LED10, and a light emitting diode LED11 connected in series in sequence, the two ends of the light emitting diode LED9 are connected in parallel with a capacitor C97, the two ends of the light emitting diode LED10 are connected in parallel with a capacitor C118, the two ends of the light emitting diode LED11 are connected in parallel with a capacitor C56, and the light emitting diode LED9 is connected in parallel with a capacitor C118. The cathode of the light emitting diode LED11 is grounded, and the anode of the light emitting diode LED9 is connected to the other end of the resistor R29; the airbag disabling indication driving circuit includes a resistor R113, one end of the resistor R113 serves as the signal input end of the airbag disabling indication driving circuit, one end of the resistor R113 is also grounded via a capacitor C74, the other end of the resistor R113 is grounded via a capacitor C106, the other end of the resistor R113 is connected to the base of the resistor transistor Q19, the emitter of the resistor transistor Q19 is grounded, the collector of the resistor transistor Q19 is connected to the base of the PNP transistor Q41 via a resistor R105, and the PNP transistor The base of Q41 is also connected to the VS output terminal of the power module via the resistor R90; the emitter of the PNP transistor Q41 is connected to the VS output terminal of the power module, the collector of the PNP transistor Q41 is connected to one end of the resistor R93 and the resistor 94 connected in parallel, and the other end thereof serves as the driving output terminal of the airbag disabling indication driving circuit; the airbag disabling indication circuit comprises a light emitting diode LED12, a resistor R91 and a capacitor C55 are connected in parallel at both ends of the light emitting diode LED12, an anode of the light emitting diode LED12 is connected to the driving output terminal of the airbag disabling indication driving circuit, and a cathode of the light emitting diode LED12 is grounded;The airbag disabling acquisition circuit includes a resistor R31, one end of which is connected to the airbag disabling self-diagnosis point, the other end of which is grounded via a resistor R68 and a capacitor C94, the other end of which is also grounded via a resistor R68 and a capacitor C93, the other end of which is also grounded via a capacitor C3, the resistor R31 is also grounded via a resistor R74, and the common end of the resistor R68 and the capacitor C94 is used to connect to the airbag disabling diagnosis acquisition end of the car ceiling light MCU; the safety airbag enabling indication drive circuit includes a resistor R124, one end of which is used as the signal input end of the safety airbag enabling indication drive circuit, and one end of which is also connected to the signal input end of the safety airbag enabling indication drive circuit Capacitor C84 is grounded, the other end of the resistor R124 is grounded via capacitor C109, the other end of the resistor R124 is connected to the base of the resistor transistor Q16, the emitter of the resistor transistor Q16 is grounded, the collector of the resistor transistor Q16 is connected to the base of the PNP transistor Q44 via resistor R121, and the base of the PNP transistor Q44 is also connected to the VS output end of the power module via resistor R112; the emitter of the PNP transistor Q44 is connected to the VS output end of the power module, the collector of the PNP transistor Q44 is connected to one end of the resistor R96 and the resistor 97 connected in parallel, and the other end thereof serves as the drive output end of the airbag activation indication drive circuit; the airbag The activation indication circuit includes a light emitting diode LED13, and a resistor R98 and a capacitor C58 are connected in parallel at both ends of the light emitting diode LED13. The anode of the light emitting diode LED13 is connected to the drive output end of the safety airbag activation indication drive circuit, and the cathode of the light emitting diode LED13 is grounded; the airbag activation acquisition circuit includes a resistor R76, one end of which is connected to the airbag activation self-diagnosis point, and the other end of the resistor R76 is grounded via a resistor R77 and a capacitor C113. The other end of the resistor R76 is also grounded via a resistor R77 and a capacitor C114. The other end of the resistor R76 is also grounded via a capacitor C49. The resistor R76 is also grounded via a resistor R80. The resistor R77 and the capacitor C114 are connected to the ground. The common end of capacitor C114 is used to connect to the airbag activation diagnosis collection end of the automobile ceiling light MCU; the seat belt reminder drive circuit includes a resistor R126, one end of the resistor R126 is used as the signal input end of the seat belt reminder drive circuit, one end of the resistor R126 is also grounded via capacitor C83, the other end of the resistor R126 is grounded via capacitor C108, the other end of the resistor R126 is connected to the base of the resistor transistor Q15, the emitter of the resistor transistor Q15 is grounded, the collector of the resistor transistor Q15 is connected to the base of the PNP transistor Q45 via the resistor R125, and the base of the PNP transistor Q45 is also connected to the VS output end of the power module via the resistor R123;The emitter of the PNP transistor Q45 is connected to the VS output end of the power module, the collector of the PNP transistor Q45 is connected to one end of the resistor R101, and the other end thereof serves as the driving output end of the seat belt reminder driving circuit; the seat belt reminder indication circuit comprises a light emitting diode LED14, a light emitting diode LED15, and a light emitting diode LED16 connected in series in sequence; a capacitor C68 is connected in parallel at both ends of the light emitting diode LED14, a capacitor C104 is connected in parallel at both ends of the light emitting diode LED15, a capacitor C105 is connected in parallel at both ends of the light emitting diode LED16, the anode of the light emitting diode LED14 is connected to the seat belt reminder self-diagnosis point, and the The cathode of the light-emitting diode LED16 is grounded, and the anode of the light-emitting diode LED14 is grounded through the cathode of the light-emitting diode LED16 after passing through the resistor R106; the seat belt reminder collection circuit includes a resistor R71, one end of which is connected to the seat belt reminder self-diagnosis point, and the other end of the resistor R71 is grounded through a resistor R72 and a capacitor C112, and the other end of the resistor R71 is also grounded through a resistor R72 and a capacitor C111, and the other end of the resistor R71 is also grounded through a capacitor C38, and the other end of the resistor R71 is also grounded through a resistor R75; the common end of the resistor R72 and the capacitor C111 is used to connect to the seat belt reminder diagnosis collection end of the car ceiling light MCU. ;

[0019] There are four indicators, namely airbag backlight indicator, airbag disable indicator, airbag enable indicator, and seat belt reminder indicator, to indicate the use status of airbags and seat belts. In addition, in the three indicator circuits of airbag disable indicator, airbag enable indicator, and seat belt reminder indicator, voltage acquisition circuits are added to collect the displayed voltage in real time. When a display fault occurs, it can quickly determine whether it is a line fault and the corresponding fault type, so as to realize fault self-diagnosis.

[0020] Furthermore, the atmosphere light module includes a first atmosphere light group and a second atmosphere light group; each atmosphere light group is provided with three branch circuits: a green light circuit, a red light circuit, and a blue light circuit; each branch circuit is provided with an atmosphere light driving circuit and an atmosphere light display circuit which are connected in sequence to the car ceiling light MCU; the atmosphere light driving circuit of the green light circuit in the first atmosphere light group includes an impedance transistor Q7, the base of the impedance transistor Q7 is connected to one end of the resistor R60, the other end of the resistor R60 is grounded via a capacitor C103, and the other end of the resistor R60 is also connected to the green atmosphere light control output terminal Green of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q7 is grounded via the capacitor C67, the emitter of the impedance transistor Q7 is grounded, the collector of the impedance transistor Q7 is respectively connected to the collector of the PNP transistor Q12 and the base of the PNP transistor Q17 via the resistor R30, the emitter of the transistor Q12 is connected to the VS output end of the power module, the base of the transistor Q12 is connected to the emitter of the transistor Q17, a resistor R39 is connected between the emitter and the base of the transistor Q12, the collector of the transistor Q17 is connected to one end of the resistor R44, the other end of the resistor R44 is grounded via the capacitor C41, and the other end of the resistor R44 serves as the driving output end AL of the atmosphere lamp driving circuit of the green light circuit in the first atmosphere lamp group G1+; The atmosphere light driving circuit of the green light circuit in the second atmosphere light group includes an impedance transistor Q29, the base of the impedance transistor Q29 is connected to one end of the resistor R60, the other end of the resistor R60 is grounded through a capacitor C103, and the other end of the resistor R60 is also connected to the green atmosphere light control output terminal Green of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q29 is grounded via the capacitor C110, the emitter of the impedance transistor Q29 is grounded, the collector of the impedance transistor Q29 is respectively connected to the collector of the PNP transistor Q30 and the base of the PNP transistor Q35 via the resistor R59, the emitter of the transistor Q30 is connected to the VS output end of the power module, the base of the transistor Q30 is connected to the emitter of the transistor Q35, a resistor R63 is connected between the emitter and the base of the transistor Q30, the collector of the transistor Q35 is connected to one end of the resistor R64, the other end of the resistor R64 is grounded via the capacitor C99, and the other end of the resistor R64 serves as the driving output end AL G2+ of the atmosphere lamp driving circuit of the green light circuit in the second atmosphere lamp group;The atmosphere light driving circuit of the red light circuit in the first atmosphere light group includes an impedance transistor Q20, the base of the impedance transistor Q20 is connected to one end of a resistor R66, the other end of the resistor R66 is grounded via a capacitor C116, and the other end of the resistor R60 is also connected to the red atmosphere light control output terminal Red of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q20 is grounded via the capacitor C81, the emitter of the impedance transistor Q20 is grounded, the collector of the impedance transistor Q20 is respectively connected to the collector of the PNP transistor Q21 and the base of the PNP transistor Q24 via the resistor R46, the emitter of the transistor Q21 is connected to the VS output end of the power module, the base of the transistor Q21 is connected to the emitter of the transistor Q24, a resistor R48 is connected between the emitter and the base of the transistor Q21, the collector of the transistor Q24 is connected to one end of the resistor R50, the other end of the resistor R50 is grounded via the capacitor C76, and the other end of the resistor R76 serves as the driving output end AL of the atmosphere lamp driving circuit of the red light circuit in the first atmosphere lamp group R1+; The atmosphere light driving circuit of the red light circuit in the second atmosphere light group includes an impedance transistor Q36, the base of the impedance transistor Q36 is connected to one end of a resistor R66, the other end of the resistor R66 is grounded via a capacitor C116, and the other end of the resistor R60 is also connected to the red atmosphere light control output terminal Red of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q36 is grounded via the capacitor C117, the emitter of the impedance transistor Q36 is grounded, the collector of the impedance transistor Q36 is respectively connected to the collector of the PNP transistor Q37 and the base of the PNP transistor Q39 via the resistor R65, the emitter of the transistor Q37 is connected to the VS output end of the power module, the base of the transistor Q37 is connected to the emitter of the transistor Q39, a resistor R67 is connected between the emitter and the base of the transistor Q37, the collector of the transistor Q39 is connected to one end of the resistor R81, the other end of the resistor R81 is grounded via the capacitor C115, and the other end of the resistor R81 serves as the driving output end AL R2+ of the atmosphere lamp driving circuit of the red light circuit in the second atmosphere lamp group;The atmosphere light driving circuit of the blue light circuit in the first atmosphere light group includes an impedance transistor Q26, the base of the impedance transistor Q26 is connected to one end of the resistor R95, the other end of the resistor R95 is grounded via a capacitor C120, the other end of the resistor R95 is also connected to the blue atmosphere light control output terminal Blue ctr of the car ceiling light MCU, the base of the impedance transistor Q26 is grounded via a capacitor C89, the emitter of the impedance transistor Q26 is grounded, the collector of the impedance transistor Q26 is respectively connected to the collector of the PNP transistor Q27 and the base of the PNP transistor Q28 via a resistor R52, the emitter of the transistor Q27 is connected to the VS output end of the power module, the base of the transistor Q27 is connected to the emitter of the transistor Q28, a resistor R63 is connected between the emitter and base of the transistor Q27, and the collector of the transistor Q28 is connected to one end of the resistor R64. The other end of the resistor R64 is connected to the ground via the capacitor C99, and the other end of the resistor R64 serves as the driving output end ALB1+ of the atmosphere light driving circuit of the blue light circuit in the first atmosphere light group; the atmosphere light driving circuit of the blue light circuit in the second atmosphere light group includes an impedance transistor Q40, the base of the impedance transistor Q40 is connected to one end of the resistor R95, and the other end of the resistor R95 is grounded via the capacitor C120, and the other end of the resistor R95 is also connected to the blue atmosphere light control output end Blue of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q40 is grounded via the capacitor C121, the emitter of the impedance transistor Q40 is grounded, the collector of the impedance transistor Q40 is respectively connected to the collector of the PNP transistor Q42 and the base of the PNP transistor Q43 via the resistor R87, the emitter of the transistor Q42 is connected to the VS output end of the power module, the base of the transistor Q42 is connected to the emitter of the transistor Q43, a resistor R99 is connected between the emitter and the base of the transistor Q42, the collector of the transistor Q43 is connected to one end of the resistor R102, the other end of the resistor R102 is grounded via the capacitor C119, and the other end of the resistor R102 serves as the driving output end AL B2+ of the atmosphere lamp driving circuit of the blue lamp circuit in the second atmosphere lamp group. ;

[0021] Two sets of ambient lights are placed in the same lamp tube at the same time to improve the reliability of the ambient lights. Even if the lamp fails, it can still be displayed. The color of the ambient light can be adjusted by adjusting the light color and voltage.

[0022] Furthermore, the chip model of the car ceiling light MCU is: ATSAMHA1, and a PWM regulator is disposed inside the car ceiling light MCU.

[0023] The chip has many ports and can be connected to different functional modules. It is also equipped with a pwm regulator to adjust the effective voltage of various lamps, thereby adjusting the brightness of various lamps and combining multiple colors to adjust the color of the lamp.

[0024] In order to centralize the connection lines with the automobile ECU, a main connector is connected to the automobile ceiling light MCU.

[0025] Beneficial effects of the present invention: an integrated automobile top integrated system is proposed, which integrates the reading light indicator module, alarm module, key backlight indicator module, seat belt and airbag indicator module, and atmosphere light module. During design and production, it can be integrated, processed and installed on a large scale to form a set of equipment, which is installed on the automobile as a whole and removed as a whole during maintenance without interference between lines. The wiring is standardized, and the fault point is easy to find. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a system structure block diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the pin connection of the MCU chip of the automobile ceiling light of the present invention;

[0028] Figure 3 It is the circuit diagram of the power regulation module;

[0029] Figure 4 It is the circuit diagram of the power conversion module;

[0030] Figure 5 This is the circuit diagram of the power drive output module;

[0031] Figure 6 It is the front left reading lamp drive display circuit diagram;

[0032] Figure 7 It is the front right reading lamp drive display circuit diagram;

[0033] Figure 8 It is the rear left reading drive circuit diagram;

[0034] Fig. 9 It is the rear right reading drive circuit diagram;

[0035] Fig.10 This is the rear left reading light lighting prompt circuit diagram;

[0036] Fig.11 This is the rear right reading light lighting prompt circuit diagram;

[0037] Fig.12 It is the specific circuit diagram of SOS switch circuit and BCALL switch circuit;

[0038] Fig.13 It is the specific circuit diagram of the SOS indicator light circuit and the BCALL indicator light circuit;

[0039] Fig.14 This is the key backlight circuit diagram;

[0040] Fig.15 It is a specific circuit diagram of the airbag background light indication driving circuit and the airbag background light indication circuit;

[0041] Fig.16 It is a specific circuit diagram of the airbag disabling indication driving circuit, the airbag disabling indication circuit and the airbag disabling acquisition circuit;

[0042] Fig.17 It is a detailed diagram of the airbag activation indication driving circuit, the airbag activation indication circuit and the airbag activation acquisition circuit;

[0043] Fig.18 It is a specific circuit diagram of the seat belt reminder driving circuit, the seat belt reminder indicating circuit and the seat belt reminder collecting circuit;

[0044] Fig.19 This is the circuit diagram of the atmosphere light module. DETAILED DESCRIPTION

[0045] The specific implementation manner and working principle of the present invention are further described in detail below with reference to the accompanying drawings.

[0046] from Figure 1 It can be seen that a multifunctional integrated control system for a car dome light comprises a car dome light MCU, which is connected to a car ECU, and a power supply module is connected to the car dome light MCU; a touch key circuit is connected to the touch key input end of the car dome light MCU, and a reading light indication module, an alarm module, a key background light indication module, a seat belt and airbag indication module, and an atmosphere light module are connected to the control output end of the car dome light MCU; the power supply module supplies power to the reading light indication module, the alarm module, the key background light indication module, the seat belt and airbag indication module, and the atmosphere light module.

[0047] In this embodiment, a capacitive key circuit is adopted, and a capacitive acquisition module is provided on the car ceiling light MCU to obtain key signals.

[0048] In this embodiment, combined with Figure 2 It can be seen that the chip model of the car ceiling light MCU is: ATSAMHA1, and a PWM regulator is provided inside the car ceiling light MCU. A main connector is connected to the car ceiling light MCU.

[0049] Combination Figure 3-5It can be seen that the power supply module includes a power supply regulation module, a power supply conversion module, and a power supply drive output module;

[0050] The power end of the power regulation module obtains the car power supply, the VS output end of the power regulation module is connected to the power drive output module and the power conversion module, and supplies power to the reading light indication module, the alarm module, the key backlight indication module, and the seat belt and airbag indication module through the VS output end; the VS-MCU output end of the power regulation module supplies power to the car ceiling light MCU when it is in sleep mode;

[0051] See also Figure 3 , a diode D1 is provided in the power regulation module, the anode of the diode D1 serves as the Power end of the power regulation module, the cathode of the diode D1 is connected to one end of a bidirectional voltage regulator diode TVS1, one end of the bidirectional voltage regulator diode TVS1 serves as the VS output end of the power regulation module, the anode of the diode D1 is also grounded via capacitors C27 and C28, the other end of the bidirectional voltage regulator diode TVS1 is grounded, the cathode of the diode D1 is also connected to the positive electrode of a polar capacitor CE1, the negative electrode of the polar capacitor CE1 is grounded, the cathode of the diode D1 is also connected to one end of an inductor FB9, the other end of the inductor FB9 serves as the VS MCU output end, one end of the inductor FB9 is grounded via capacitor C25, and the other end of the inductor FB9 is grounded via capacitor C26;

[0052] See also Figure 4 , the power conversion module is connected to the sleep mode control end of the car ceiling light MCU, and the 12V AD output end of the power conversion module supplies power to the car ceiling light MCU in the wake-up mode; the power conversion module includes a PNP transistor Q1, the emitter of the transistor Q1 serves as the VS input end of the power conversion module, a resistor R15 is connected between the base and the emitter of the transistor Q1, the base of the transistor Q1 is also connected to the collector of the impedance transistor Q5 through the resistor R20, the base of the impedance transistor Q5 serves as the Sleep_Mode ctr input end of the power conversion module, the base of the impedance transistor Q5 is also grounded through the capacitor C65, the collector of the transistor Q1 is connected to one end of the resistor R5 through the resistor R6, the other end of the resistor R5 serves as the 12V AD output end, the other end of the resistor R5 is also grounded through the capacitor C53, one end of the resistor R5 is grounded through the capacitor C6, and one end of the resistor R5 is also grounded through the resistor R10.

[0053] join Figure 5, the power drive output module is connected to the sleep mode control end of the car ceiling light MCU, and the RRL output end of the power drive output module is used to supply power to the rear reading light of the car; the power drive output module includes a PNP transistor Q23 and an impedance transistor Q14, the emitter of the transistor Q23 is connected to one end of the resistor R32, and the other end of the resistor R32 is used as the VS input end, and one end of the resistor R32 is also grounded through a capacitor C87, and a resistor R19 is also connected between the emitter of the transistor Q23 and the base of the transistor Q23, and the collector of the transistor Q23 is connected to one end of the varistor FS1, and the other end of the varistor FS1 is used as the RRL output end; the base of the transistor Q23 is connected to the collector of the impedance transistor Q14 through a resistor R116, and the base of the impedance transistor Q14 is used as the Sleep_Mode ctr input end of the power drive output module, and the emitter of the impedance transistor Q14 is grounded.

[0054] In this embodiment, combined with Figure 6-11 It can be seen that the reading light indication module includes a front row left reading light driving and display circuit, a front row right reading light driving and display circuit, a rear row left reading light driving circuit, a rear row left reading light lighting prompt circuit, a rear row right reading light driving circuit, and a rear row right reading light lighting prompt circuit;

[0055] The front row left reading light control output end of the car dome light MCU is connected to the front row left reading light drive display circuit, the front row right reading light control output end of the car dome light MCU is connected to the front row right reading light drive display circuit, the rear row left reading light control output end of the car dome light MCU is connected to the rear row left reading light drive circuit, the rear row left reading light lighting feedback end of the car dome light MCU is connected to the rear row left reading light lighting prompt circuit, the rear row right reading light control output end of the car dome light MCU is connected to the rear row right reading light drive circuit, and the rear row right reading light lighting feedback end of the car dome light MCU is connected to the rear row right reading light lighting prompt circuit;

[0056] See also Figure 6The front left reading light driving display circuit includes an NPN transistor Q3, the collector of the NPN transistor Q3 is connected to one end of a resistor R14, one end of the resistor R14 is also grounded via a capacitor C23, and the other end of the resistor R14 is used to connect to the front left reading light control output end of the car ceiling light MCU; a capacitor C10 is connected between the collector and emitter of the NPN transistor Q3, the emitter of the NPN transistor Q3 is grounded, and the collector of the NPN transistor Q3 is also connected to the base of the NPN transistor Q2. The emitter of the NPN transistor Q2 is grounded via a resistor R17, the base of the NPN transistor Q3 is connected to the emitter of the NPN transistor Q2, the collector of the NPN transistor Q2 is connected to the cathode of the light-emitting diode LED1, the anode of the light-emitting diode LED1 is connected to the VS output end of the power module via a parallel resistor composed of a resistor R17, a resistor R9, and a resistor R11, and a capacitor C7 is also connected in parallel at both ends of the light-emitting diode LED1; the capacitance of the capacitor C23 is 10nF;

[0057] See also Figure 7 The front right reading light driving display circuit includes an NPN transistor Q6, the collector of the NPN transistor Q6 is connected to one end of a resistor R13, one end of the resistor R13 is also grounded via a capacitor C22, and the other end of the resistor R13 is used to connect to the front right reading light control output end of the car ceiling light MCU; a capacitor C11 is connected between the collector and emitter of the NPN transistor Q6, the emitter of the NPN transistor Q6 is grounded, and the collector of the NPN transistor Q6 is also connected to the base of the NPN transistor Q4, The emitter of the NPN transistor Q4 is grounded via a resistor R43, the base of the NPN transistor Q6 is connected to the emitter of the NPN transistor Q4, the collector of the NPN transistor Q4 is connected to the cathode of the light-emitting diode LED17, the anode of the light-emitting diode LED17 is connected to the VS output end of the power module via a parallel resistor composed of resistors R1, R2, and R3, and capacitor C1 and resistor R8 are connected in parallel at both ends of the light-emitting diode LED17; the capacitance of the capacitor C22 is 10nF;

[0058] See also Figure 8 The rear left reading driving circuit includes a resistor transistor Q32, the collector of which is connected to one end of a resistor R28, the other end of which is connected to the rear left reading light control output end of the car ceiling light MCU, the emitter of which is grounded, the base of which is connected to one end of a resistor R12, the other end of which is grounded via a capacitor C15, and the other end of which serves as the driving end of the rear left reading driving circuit; the capacitance of the capacitor C15 is 10nF, and the working voltage is 50V; see Fig.10 The rear left reading light lighting prompt circuit includes a diode D2, the cathode of the diode D2 is used as the collection end of the rear left reading light lighting prompt circuit, the cathode of the diode D2 is also grounded via a capacitor C46, ​​the anode of the diode D2 is grounded via a capacitor C44, the anode of the diode D2 is also connected to the power supply VCC 3V3 via a resistor R78, the anode of the diode D2 is connected to one end of a resistor R79, the other end of the resistor R79 is grounded via a capacitor C45, and the other end of the resistor R79 is also connected to the rear left reading light lighting feedback end of the car ceiling light MCU;

[0059] See also Fig. 9 The rear right reading driving circuit includes a resistor transistor Q31, the collector of which is connected to one end of a resistor R27, the other end of which is connected to the rear right reading light control output end of the car ceiling light MCU, the emitter of which is grounded, the base of which is connected to one end of a resistor R4, the other end of which is grounded via a capacitor C14, and the other end of which serves as the driving end of the rear right reading driving circuit; the capacitance of the capacitor C14 is 10nF, and the working voltage is 50V; see Fig.11 The rear right reading light lighting prompt circuit includes a diode D4, the cathode of which serves as the collection end of the rear right reading light lighting prompt circuit, the cathode of the diode D4 is also grounded via a capacitor C60, the anode of the diode D4 is grounded via a capacitor C61, the anode of the diode D4 is also connected to the power supply VCC 3V3 via a resistor R88, the anode of the diode D4 is connected to one end of a resistor R92, the other end of the resistor R92 is grounded via a capacitor C59, and the other end of the resistor R92 is also connected to the rear right reading light lighting feedback end of the car ceiling light MCU.

[0060] See also Figure 12-13 , the alarm module includes an SOS switch circuit, an SOS display light circuit, a BCALL switch circuit, and a BCALL display light circuit; the SOS control output terminal SOS output ctr of the car ceiling light MCU is connected to the SOS switch circuit, the switch signal output terminal of the SOS switch circuit is connected to the car ECU, and the car ECU is connected to the SOS display light circuit; the BCALL control output terminal BCALL output ctr of the car ceiling light MCU is connected to the BCALL switch circuit, the switch signal output terminal of the BCALL switch circuit is connected to the car ECU, and the car ECU is connected to the BCALL display light circuit;

[0061] See also Fig.12The SOS switch circuit includes a resistor R114, one end of which is connected to the SOS control output terminal, one end of which is grounded after passing through a capacitor C125, and the other end of which is connected to the base of an eighth switch tube Q8. The eighth switch tube Q8 is an NPN type band-blocking transistor Q8, the emitter of which is grounded, the collector of which is connected to one end of a resistor R73, and the other end of which is used as a switch signal output terminal of the SOS switch circuit; the collector of the band-blocking transistor Q8 is also grounded after passing through a capacitor C101; the BCALL switch circuit includes a resistor R122, one end of which is connected to the BCALL control output terminal, and the other end of which is grounded after passing through a capacitor C126, The other end of the resistor R122 is grounded via the capacitor C79; the other end of the resistor R122 is connected to the base of the ninth switch tube Q9, which is an NPN type band-stop transistor Q9, the emitter of the band-stop transistor Q9 is grounded, the collector of the band-stop transistor Q9 is connected to one end of the resistor R70, the other end of the resistor R70 serves as the switch signal output end of the BCALL switch circuit, and the collector of the band-stop transistor Q9 is also grounded via the capacitor C98; the other end of the resistor R70 is connected to one end of the protection diode ESD2, and the other end of the protection diode ESD2 is connected to the other end of the resistor R73; the other end of the resistor R70 is grounded via the capacitor C80; the other end of the resistor R70 is connected to the other end of the resistor R73;

[0062] See also Fig.13 The SOS display light circuit includes a diode D5, the anode of which is connected to the SOS alarm display terminal of the automobile ECU, the anode of which is grounded via a capacitor C72, the cathode of which is connected to the anode of a light-emitting diode LED7 via a parallel resistor formed by a resistor R82 and a resistor R138 connected in parallel, and the cathode of which is grounded; a resistor R83 and a capacitor C66 are connected in parallel at both ends of the light-emitting diode LED7.

[0063] See also Fig.13 The BCALL display light circuit includes a diode D7, the anode of which is connected to the BCALL alarm display terminal of the automobile ECU, the anode of which is grounded after passing through a capacitor C50, the cathode of which is connected to the anode of a light-emitting diode LED8 after passing through a resistor R86, and the cathode of which is grounded; a resistor R42 and a capacitor C77 are connected in parallel at both ends of the light-emitting diode LED8.

[0064] In this embodiment, the key backlight indication module includes a key backlight circuit. Fig.14The button backlight circuit includes a left reading light button backlight circuit, a reading light full-bright touch button backlight circuit and a right reading light button backlight circuit;

[0065] The left reading light button background light circuit comprises a light emitting diode LED5, the anode of the light emitting diode LED6 is connected to the VS output end of the power module via a resistor R49 and a resistor R51 connected in parallel; the VS output end is grounded via a capacitor C42; the cathode of the light emitting diode LED5 is connected to the collector of an NPN resistor transistor Q22, the base of the NPN resistor transistor Q22 is connected to one end of a resistor R18, the other end of the resistor R18 is connected to the left reading light button background light control output end ILL_LH_ctr of the car ceiling light MCU, the common end of the resistor R18 and the base of the NPN resistor transistor Q22 is grounded via a capacitor C63, the other end of the resistor R18 is grounded via a capacitor C21, the emitter of the NPN resistor transistor Q22 is grounded, and the collector of the NPN resistor transistor Q22 is connected to the cathode of the light emitting diode LED5; capacitor C24 and resistor R109 are connected in parallel at both ends of the light emitting diode LED5. ; The reading light full-bright touch key background light circuit includes a light-emitting diode LED6 and an NPN resistor transistor Q25, the anode of the light-emitting diode LED6 is connected to the VS output end of the power module through a resistor R58 and a resistor R62 connected in parallel; the VS output end of the power module is grounded through a capacitor C42; the base of the NPN resistor transistor Q25 is connected to one end of the resistor R21, and the other end of the resistor R21 is connected to the reading light full-bright key background light control output end ILL_door_ctr of the car ceiling light MCU, the common end of the resistor R21 and the base of the NPN resistor transistor Q22 is grounded through a capacitor C64, the other end of the resistor R21 is grounded through a capacitor C29, the emitter of the NPN resistor transistor Q25 is grounded, and the collector of the NPN resistor transistor Q25 is connected to the cathode of the light-emitting diode LED6; capacitor C31 and resistor R110 are connected in parallel at both ends of the light-emitting diode LED6.The right reading light button background light circuit includes a light emitting diode LED2, the anode of the light emitting diode LED2 is connected to one end of a third voltage-dividing resistor formed by resistors R40 and R41 in parallel, and the other end of the third voltage-dividing resistor formed by resistors R40 and R41 in parallel is connected to the collector of the PNP transistor Q10; the emitter of the PNP transistor Q10 is the VS output end of the power module, the base of the PNP transistor Q10 is connected to the collector of the resistor transistor Q18 via the resistor R117, the emitter of the resistor transistor Q18 is grounded, and the The base is connected to the right reading light button background light control output terminal SWDCLK&ILL_RH_ctr of the car ceiling light MCU through resistor R16, and the collector of the resistor transistor Q18 is connected to the VS output terminal of the power module through resistor R115; the anode of the light-emitting diode LED2 is connected to the emitter of the PNP transistor Q33, the collector of the PNP transistor Q33 is grounded, and the base of the PNP transistor Q33 is grounded through resistor R118 and capacitor C19; a resistor R119 is arranged between the base and the emitter of the PNP transistor Q33.

[0066] In this embodiment, the seat belt and airbag indication module includes an airbag background light indication drive circuit, an airbag disable indication drive circuit, an airbag enable indication drive circuit, and a seat belt reminder drive circuit;

[0067] See also Fig.15 The signal input end of the airbag background light indication driving circuit is used to connect with the airbag background light control output end of the automobile ceiling light MCU, and the driving output end of the airbag background light indication driving circuit is connected with the airbag background light indication circuit;

[0068] See also Fig.16 The signal input end of the airbag disabling indication driving circuit is used to connect with the airbag disabling control output end of the automobile dome light MCU, the driving output end of the airbag disabling indication driving circuit is connected with the airbag disabling indication circuit, an airbag disabling self-diagnosis point is provided between the airbag disabling indication driving circuit and the airbag disabling indication circuit, and the airbag disabling self-diagnosis point is used to connect with the airbag disabling diagnosis acquisition end of the automobile dome light MCU after passing through the airbag disabling acquisition circuit;

[0069] See also Fig.17The signal input end of the airbag activation indication drive circuit is used to connect with the airbag activation control output end of the automobile dome light MCU, the driving output end of the airbag activation indication drive circuit is connected with the airbag activation indication circuit, an airbag activation self-diagnosis point is provided between the airbag activation indication drive circuit and the airbag activation indication circuit, and the airbag activation self-diagnosis point is used to connect with the airbag activation diagnosis acquisition end of the automobile dome light MCU after passing through the airbag activation acquisition circuit;

[0070] See also Fig.18 The signal input end of the seat belt reminder driving circuit is used to connect with the seat belt control output end of the car ceiling light MCU, the driving output end of the seat belt reminder driving circuit is connected with the seat belt reminder indication circuit, and a seat belt reminder self-diagnosis point is arranged between the seat belt reminder driving circuit and the seat belt reminder indication circuit, and the seat belt reminder self-diagnosis point is used to connect with the seat belt reminder diagnosis acquisition end of the car ceiling light MCU after passing through the seat belt reminder acquisition circuit.

[0071] See also Fig.15 The airbag backlight indication driving circuit includes a resistor R104, one end of the resistor R104 is used as the signal input end of the airbag backlight indication driving circuit, one end of the resistor R104 is also grounded via a capacitor C82, the other end of the resistor R104 is connected to the base of the resistor transistor Q13, the emitter of the resistor transistor Q13 is grounded, the collector of the resistor transistor Q13 is connected to the base of the PNP transistor Q38 via a resistor R89, the common end of the PNP transistor Q38 and the resistor R89 ​​is also connected to the VS output end of the power module via a resistor R84, the emitter of the PNP transistor Q38 is connected to the VS output end of the power module, and the collector of the PNP transistor Q38 is connected to the VS output end of the power module. connected to one end of a resistor R29, the other end of the resistor R29 is grounded via a resistor R38 and a capacitor C35 respectively, the other end of the resistor R29 also serves as a driving output end of the airbag background light indication driving circuit; the airbag background light indication circuit comprises a light emitting diode LED9, a light emitting diode LED10, and a light emitting diode LED11 connected in series in sequence, a capacitor C97 is connected in parallel at both ends of the light emitting diode LED9, a capacitor C118 is connected in parallel at both ends of the light emitting diode LED10, a capacitor C56 is connected in parallel at both ends of the light emitting diode LED11, the cathode of the light emitting diode LED11 is grounded, and the anode of the light emitting diode LED9 is connected to the other end of the resistor R29;

[0072] See also Fig.16The airbag disabling indication driving circuit includes a resistor R113, one end of the resistor R113 is used as the signal input end of the airbag disabling indication driving circuit, one end of the resistor R113 is also grounded via a capacitor C74, the other end of the resistor R113 is grounded via a capacitor C106, the other end of the resistor R113 is connected to the base of a resistor transistor Q19, the emitter of the resistor transistor Q19 is grounded, the collector of the resistor transistor Q19 is connected to the base of a PNP transistor Q41 via a resistor R105, the base of the PNP transistor Q41 is also connected to the VS output end of the power module via a resistor R90; the emitter of the PNP transistor Q41 is connected to the VS output end of the power module, the collector of the PNP transistor Q41 is connected to one end of the resistor R93 and the resistor 94 connected in parallel, and the other end thereof is used as the airbag disabling indication driving circuit. The driving output end of the disable indication driving circuit; the airbag disable indication circuit includes a light emitting diode LED12, and a resistor R91 and a capacitor C55 are connected in parallel at both ends of the light emitting diode LED12, the anode of the light emitting diode LED12 is connected to the driving output end of the airbag disable indication driving circuit, and the cathode of the light emitting diode LED12 is grounded; the airbag disable acquisition circuit includes a resistor R31, one end of the resistor R31 is connected to the airbag disable self-diagnosis point, the other end of the resistor R31 is grounded via a resistor R68 and a capacitor C94, the other end of the resistor R31 is also grounded via a resistor R68 and a capacitor C93, the other end of the resistor R31 is also grounded via a capacitor C3, the resistor R31 is also grounded via a resistor R74, and the common end of the resistor R68 and the capacitor C94 is used to be connected to the airbag disable diagnosis acquisition end of the automobile ceiling light MCU;

[0073] See also Fig.17The airbag activation indication driving circuit includes a resistor R124, one end of the resistor R124 serves as the signal input end of the airbag activation indication driving circuit, one end of the resistor R124 is also grounded via a capacitor C84, the other end of the resistor R124 is grounded via a capacitor C109, the other end of the resistor R124 is connected to the base of a resistor transistor Q16, the emitter of the resistor transistor Q16 is grounded, the collector of the resistor transistor Q16 is connected to the base of a PNP transistor Q44 via a resistor R121, the base of the PNP transistor Q44 is also connected to the VS output end of the power module via a resistor R112; the emitter of the PNP transistor Q44 is connected to the VS output end of the power module, the collector of the PNP transistor Q44 is connected to one end of a resistor R96 and a resistor 97 connected in parallel, and the other end serves as the airbag activation indication driving circuit. The driving output end of the indicating driving circuit; the airbag activation indicating circuit comprises a light emitting diode LED13, and a resistor R98 and a capacitor C58 are connected in parallel at both ends of the light emitting diode LED13, the anode of the light emitting diode LED13 is connected to the driving output end of the airbag activation indicating driving circuit, and the cathode of the light emitting diode LED13 is grounded; the airbag activation acquisition circuit comprises a resistor R76, one end of which is connected to the airbag activation self-diagnosis point, the other end of the resistor R76 is grounded via a resistor R77 and a capacitor C113, the other end of the resistor R76 is also grounded via a resistor R77 and a capacitor C114, the other end of the resistor R76 is also grounded via a capacitor C49, the resistor R76 is also grounded via a resistor R80, and the common end of the resistor R77 and the capacitor C114 is used to be connected to the airbag activation diagnosis acquisition end of the automobile ceiling light MCU;

[0074] See also Fig.18The seat belt reminder driving circuit includes a resistor R126, one end of the resistor R126 is used as the signal input end of the seat belt reminder driving circuit, one end of the resistor R126 is also grounded via a capacitor C83, the other end of the resistor R126 is grounded via a capacitor C108, the other end of the resistor R126 is connected to the base of the resistor transistor Q15, the emitter of the resistor transistor Q15 is grounded, the collector of the resistor transistor Q15 is connected to the base of the PNP transistor Q45 via a resistor R125, and the base of the PNP transistor Q45 is also connected to the VS output end of the power module via a resistor R123; the emitter of the PNP transistor Q45 is connected to the VS output end of the power module, the collector of the PNP transistor Q45 is connected to one end of the resistor R101, and the other end is used as the driving output end of the seat belt reminder driving circuit; the seat belt reminder indication circuit includes a light emitting diode LED14, a light emitting diode LED15, and a light emitting diode LED14 connected in series in sequence. 16; capacitor C68 is connected in parallel at both ends of the light emitting diode LED14, capacitor C104 is connected in parallel at both ends of the light emitting diode LED15, capacitor C105 is connected in parallel at both ends of the light emitting diode LED16, the anode of the light emitting diode LED14 is connected to the seat belt reminder self-diagnosis point, the cathode of the light emitting diode LED16 is grounded, the anode of the light emitting diode LED14 is connected to the cathode of the light emitting diode LED16 after passing through the resistor R106; the seat belt reminder acquisition circuit includes a resistor R71, one end of the resistor R71 is connected to the seat belt reminder self-diagnosis point, the other end of the resistor R71 is grounded through a resistor R72 and a capacitor C112, the other end of the resistor R71 is also grounded through a resistor R72 and a capacitor C111, the other end of the resistor R71 is also grounded through a capacitor C38, and the other end of the resistor R71 is also grounded through a resistor R75; the common end of the resistor R72 and the capacitor C111 is used to connect to the seat belt reminder diagnosis acquisition end of the car ceiling light MCU.

[0075] See also Fig.19 The atmosphere light module includes a first atmosphere light group and a second atmosphere light group; each atmosphere light group is provided with three branch circuits: a green light circuit, a red light circuit, and a blue light circuit; each branch circuit is provided with an atmosphere light driving circuit and an atmosphere light display circuit which are sequentially connected to the automobile ceiling light MCU; see Fig.19The atmosphere light driving circuit of the green light circuit in the first atmosphere light group includes an impedance transistor Q7, the base of the impedance transistor Q7 is connected to one end of the resistor R60, the other end of the resistor R60 is grounded via a capacitor C103, and the other end of the resistor R60 is also connected to the green atmosphere light control output terminal Green of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q7 is grounded via the capacitor C67, the emitter of the impedance transistor Q7 is grounded, the collector of the impedance transistor Q7 is respectively connected to the collector of the PNP transistor Q12 and the base of the PNP transistor Q17 via the resistor R30, the emitter of the transistor Q12 is connected to the VS output end of the power module, the base of the transistor Q12 is connected to the emitter of the transistor Q17, a resistor R39 is connected between the emitter and the base of the transistor Q12, the collector of the transistor Q17 is connected to one end of the resistor R44, the other end of the resistor R44 is grounded via the capacitor C41, and the other end of the resistor R44 serves as the driving output end AL of the atmosphere lamp driving circuit of the green light circuit in the first atmosphere lamp group G1+; The atmosphere light driving circuit of the green light circuit in the second atmosphere light group includes an impedance transistor Q29, the base of the impedance transistor Q29 is connected to one end of the resistor R60, the other end of the resistor R60 is grounded through a capacitor C103, and the other end of the resistor R60 is also connected to the green atmosphere light control output terminal Green of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q29 is grounded via the capacitor C110, the emitter of the impedance transistor Q29 is grounded, the collector of the impedance transistor Q29 is respectively connected to the collector of the PNP transistor Q30 and the base of the PNP transistor Q35 via the resistor R59, the emitter of the transistor Q30 is connected to the VS output end of the power module, the base of the transistor Q30 is connected to the emitter of the transistor Q35, a resistor R63 is connected between the emitter and the base of the transistor Q30, the collector of the transistor Q35 is connected to one end of the resistor R64, the other end of the resistor R64 is grounded via the capacitor C99, and the other end of the resistor R64 serves as the driving output end AL of the atmosphere lamp driving circuit of the green light circuit in the second atmosphere lamp group G2+; the atmosphere light driving circuit of the red light circuit in the first atmosphere light group includes an impedance transistor Q20, the base of the impedance transistor Q20 is connected to one end of the resistor R66, the other end of the resistor R66 is grounded via a capacitor C116, the other end of the resistor R60 is also connected to the red atmosphere light control output terminal Red ctr of the car ceiling light MCU, the base of the impedance transistor Q20 is grounded via a capacitor C81, the emitter of the impedance transistor Q20 is grounded, the collector of the impedance transistor Q20 is respectively connected to the collector of the PNP transistor Q21 and the base of the PNP transistor Q24 via a resistor R46, and the emitter of the transistor Q21 is connected to the VS output terminal of the power module,The base of the transistor Q21 is connected to the emitter of the transistor Q24, and a resistor R48 is connected between the emitter and base of the transistor Q21. The collector of the transistor Q24 is connected to one end of the resistor R50, and the other end of the resistor R50 is grounded via a capacitor C76. The other end of the resistor R76 serves as the driving output terminal AL R1+ of the atmosphere light driving circuit of the red light circuit in the first atmosphere light group. The atmosphere light driving circuit of the red light circuit in the second atmosphere light group includes an impedance transistor Q36, and the base of the impedance transistor Q36 is connected to one end of the resistor R66, and the other end of the resistor R66 is grounded via a capacitor C116. The other end of the resistor R60 is also connected to the red atmosphere light control output terminal Red of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q36 is grounded via the capacitor C117, the emitter of the impedance transistor Q36 is grounded, the collector of the impedance transistor Q36 is respectively connected to the collector of the PNP transistor Q37 and the base of the PNP transistor Q39 via the resistor R65, the emitter of the transistor Q37 is connected to the VS output end of the power module, the base of the transistor Q37 is connected to the emitter of the transistor Q39, and a resistor R67 is connected between the emitter and the base of the transistor Q37, the collector of the transistor Q39 is connected to one end of the resistor R81, the other end of the resistor R81 is grounded via the capacitor C115, and the other end of the resistor R81 serves as the driving output end AL R2+ of the atmosphere lamp driving circuit of the red light circuit in the second atmosphere lamp group. The atmosphere light driving circuit of the blue light circuit in the first atmosphere light group includes an impedance transistor Q26, the base of the impedance transistor Q26 is connected to one end of a resistor R95, the other end of the resistor R95 is grounded via a capacitor C120, and the other end of the resistor R95 is also connected to the blue atmosphere light control output terminal Blue of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q26 is grounded via the capacitor C89, the emitter of the impedance transistor Q26 is grounded, the collector of the impedance transistor Q26 is respectively connected to the collector of the PNP transistor Q27 and the base of the PNP transistor Q28 via the resistor R52, the emitter of the transistor Q27 is connected to the VS output end of the power module, the base of the transistor Q27 is connected to the emitter of the transistor Q28, a resistor R63 is connected between the emitter and the base of the transistor Q27, the collector of the transistor Q28 is connected to one end of the resistor R64, the other end of the resistor R64 is grounded via the capacitor C99, and the other end of the resistor R64 serves as the driving output end AL B1+ of the atmosphere lamp driving circuit of the blue lamp circuit in the first atmosphere lamp group. The atmosphere light driving circuit of the blue light circuit in the second atmosphere light group includes an impedance transistor Q40, the base of the impedance transistor Q40 is connected to one end of a resistor R95, and the other end of the resistor R95 is grounded via a capacitor C120.The other end of the resistor R95 is also connected to the blue ambient light control output terminal Blue ctr of the car ceiling light MCU, the base of the impedance transistor Q40 is grounded through the capacitor C121, the emitter of the impedance transistor Q40 is grounded, the collector of the impedance transistor Q40 is connected to the collector of the PNP transistor Q42 and the base of the PNP transistor Q43 through the resistor R87, the emitter of the transistor Q42 is connected to the VS output terminal of the power module, the base of the transistor Q42 is connected to the emitter of the transistor Q43, a resistor R99 is connected between the emitter and base of the transistor Q42, the collector of the transistor Q43 is connected to one end of the resistor R102, the other end of the resistor R102 is grounded through the capacitor C119, and the other end of the resistor R102 is used as the driving output terminal AL B2+ of the ambient light driving circuit of the blue light circuit in the second ambient light group. ,

[0076] In this embodiment, the car ceiling light MCU is connected with a main connector for connecting to a LIN bus, a power supply POWER, etc.

[0077] It should be pointed out that the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A multifunctional integrated control system for a car ceiling light, comprising a car ceiling light MCU, the car ceiling light MCU being connected to a car ECU, characterized in that: The car dome light MCU is connected to a power module; the touch key input end of the car dome light MCU is connected to a touch key circuit, and the control output end of the car dome light MCU is connected to a reading light indication module, an alarm module, a key background light indication module, a seat belt and airbag indication module, and an atmosphere light module; the power module supplies power to the reading light indication module, the alarm module, the key background light indication module, the seat belt and airbag indication module, and the atmosphere light module; The power supply module includes a power supply regulating module, a power supply conversion module, and a power supply driving output module; The power end of the power regulation module obtains the car power supply, the VS output end of the power regulation module is connected to the power drive output module and the power conversion module, and supplies power to the reading light indication module, the alarm module, the key backlight indication module, and the seat belt and airbag indication module through the VS output end; the VS-MCU output end of the power regulation module supplies power to the car ceiling light MCU when it is in sleep mode; The power supply regulating module is provided with a diode D1, the anode of the diode D1 serves as the Power end of the power supply regulating module, the cathode of the diode D1 is connected to one end of a bidirectional voltage regulator diode TVS1, one end of the bidirectional voltage regulator diode TVS1 serves as the VS output end of the power supply regulating module, the anode of the diode D1 is also grounded via capacitors C27 and C28, the other end of the bidirectional voltage regulator diode TVS1 is grounded, the cathode of the diode D1 is also connected to the positive electrode of a polar capacitor CE1, the negative electrode of the polar capacitor CE1 is grounded, the cathode of the diode D1 is also connected to one end of an inductor FB9, the other end of the inductor FB9 serves as the VSMCU output end, one end of the inductor FB9 is grounded via capacitor C25, and the other end of the inductor FB9 is grounded via capacitor C26; The power conversion module is connected to the sleep mode control terminal of the car ceiling light MCU, and the 12V AD output terminal of the power conversion module supplies power to the car ceiling light MCU when in wake-up mode; The power conversion module includes a PNP transistor Q1, the emitter of the transistor Q1 serves as the VS input terminal of the power conversion module, a resistor R15 is connected between the base and the emitter of the transistor Q1, the base of the transistor Q1 is also connected to the collector of the impedance transistor Q5 via a resistor R20, the base of the impedance transistor Q5 serves as the Sleep_Mode ctr input terminal of the power conversion module, the base of the impedance transistor Q5 is also grounded via a capacitor C65, the collector of the transistor Q1 is connected to one end of a resistor R5 via a resistor R6, the other end of the resistor R5 serves as a 12V AD output terminal, the other end of the resistor R5 is also grounded via a capacitor C53, one end of the resistor R5 is grounded via a capacitor C6, and one end of the resistor R5 is also grounded via a resistor R10; The power drive output module is connected to the sleep mode control terminal of the automobile ceiling light MCU, and the RRL output terminal of the power drive output module is used to supply power to the rear reading lights of the automobile; The power drive output module includes a PNP transistor Q23 and an impedance transistor Q14, the emitter of the transistor Q23 is connected to one end of a resistor R32, the other end of the resistor R32 is used as a VS input end, one end of the resistor R32 is also grounded via a capacitor C87, a resistor R19 is also connected between the emitter of the transistor Q23 and the base of the transistor Q23, the collector of the transistor Q23 is connected to one end of a varistor FS1, and the other end of the varistor FS1 is used as an RRL output end; the base of the transistor Q23 is connected to the collector of the impedance transistor Q14 via a resistor R116, the base of the impedance transistor Q14 is used as a Sleep_Mode ctr input end of the power drive output module, and the emitter of the impedance transistor Q14 is grounded; The automobile ceiling light MCU is connected with a main connector, which is used to connect to the LIN bus and supply power to the Power end of the power module.

2. The multifunctional integrated control system for automobile ceiling lights according to claim 1, characterized in that: The reading light indication module includes a front row left reading light driving and display circuit, a front row right reading light driving and display circuit, a rear row left reading light driving circuit, a rear row left reading light lighting prompt circuit, a rear row right reading light driving circuit, and a rear row right reading light lighting prompt circuit; The front row left reading light control output end of the car dome light MCU is connected to the front row left reading light drive display circuit, the front row right reading light control output end of the car dome light MCU is connected to the front row right reading light drive display circuit, the rear row left reading light control output end of the car dome light MCU is connected to the rear row left reading light drive circuit, the rear row left reading light lighting feedback end of the car dome light MCU is connected to the rear row left reading light lighting prompt circuit, the rear row right reading light control output end of the car dome light MCU is connected to the rear row right reading light drive circuit, and the rear row right reading light lighting feedback end of the car dome light MCU is connected to the rear row right reading light lighting prompt circuit; The front left reading light driving and display circuit includes an NPN transistor Q3, the collector of which is connected to one end of a resistor R14, the other end of which is also grounded via a capacitor C23, and the other end of which is used to connect to the front left reading light control output end of the car ceiling light MCU; a capacitor C10 is connected between the collector and emitter of the NPN transistor Q3, the emitter of the NPN transistor Q3 is grounded, and the collector of the NPN transistor Q3 is also connected to the base of the NPN transistor Q2. The emitter of the NPN transistor Q2 is grounded via a resistor R17, the base of the NPN transistor Q3 is connected to the emitter of the NPN transistor Q2, the collector of the NPN transistor Q2 is connected to the cathode of the light-emitting diode LED1, the anode of the light-emitting diode LED1 is connected to the VS output end of the power module via a parallel resistor composed of a resistor R7, a resistor R9, and a resistor R11, and a capacitor C7 is also connected in parallel at both ends of the light-emitting diode LED1; the capacitance of the capacitor C23 is 10nF; The front right reading light driving display circuit includes an NPN transistor Q6, the collector of which is connected to one end of a resistor R13, the other end of which is also grounded via a capacitor C22, and the other end of which is used to connect to the front right reading light control output end of the car ceiling light MCU; a capacitor C11 is connected between the collector and emitter of the NPN transistor Q6, the emitter of the NPN transistor Q6 is grounded, and the collector of the NPN transistor Q6 is also connected to the base of the NPN transistor Q4, The emitter of the NPN transistor Q4 is grounded via a resistor R43, the base of the NPN transistor Q6 is connected to the emitter of the NPN transistor Q4, the collector of the NPN transistor Q4 is connected to the cathode of the light-emitting diode LED17, the anode of the light-emitting diode LED17 is connected to the VS output end of the power module via a parallel resistor composed of resistors R1, R2, and R3, and capacitor C1 and resistor R8 are connected in parallel at both ends of the light-emitting diode LED17; the capacitance of the capacitor C22 is 10nF; The rear left reading drive circuit includes a resistor transistor Q32, the collector of which is connected to one end of a resistor R28, the other end of which is connected to the rear left reading light control output end of the car ceiling light MCU, the emitter of which is grounded, the base of which is connected to one end of a resistor R12, the other end of which is grounded via a capacitor C15, and the other end of which serves as the driving end of the rear left reading drive circuit; the capacitance of the capacitor C15 is 10nF; the rear left reading light lighting prompt circuit includes a diode D2, the cathode of which serves as the collection end of the rear left reading light lighting prompt circuit, the cathode of the diode D2 is also grounded via a capacitor C46, ​​the anode of the diode D2 is grounded via a capacitor C44, and the anode of the diode D2 is also connected to the power supply VCC via a resistor R78. 3V3, the anode of the diode D2 is connected to one end of the resistor R79, the other end of the resistor R79 is grounded via the capacitor C45, and the other end of the resistor R79 is also connected to the rear left reading light lighting feedback end of the car ceiling light MCU; The rear right reading drive circuit includes a resistor transistor Q31, the collector of which is connected to one end of a resistor R27, the other end of which is connected to the rear right reading light control output end of the car ceiling light MCU, the emitter of which is grounded, the base of which is connected to one end of a resistor R4, the other end of which is grounded via a capacitor C14, and the other end of which serves as the driving end of the rear right reading drive circuit; the capacitance of the capacitor C14 is 10nF; the rear right reading light lighting prompt circuit includes a diode D4, the cathode of which serves as the collection end of the rear right reading light lighting prompt circuit, the cathode of the diode D4 is also grounded via a capacitor C60, the anode of the diode D4 is grounded via a capacitor C61, and the anode of the diode D4 is also connected to the power supply VCC via a resistor R88. 3V3, the anode of the diode D4 is connected to one end of the resistor R92, the other end of the resistor R92 is grounded via the capacitor C59, and the other end of the resistor R92 is also connected to the rear right reading light lighting feedback end of the car ceiling light MCU.

3. The multifunctional integrated control system for automobile ceiling lights according to claim 1, characterized in that: The alarm module includes an SOS switch circuit, an SOS display light circuit, a BCALL switch circuit, and a BCALL display light circuit; the SOS control output terminal SOS output ctr of the car ceiling light MCU is connected to the SOS switch circuit, the switch signal output terminal of the SOS switch circuit is connected to the car ECU, and the car ECU is connected to the SOS display light circuit; the BCALL control output terminal BCALL output ctr of the car ceiling light MCU is connected to the BCALL switch circuit, the switch signal output terminal of the BCALL switch circuit is connected to the car ECU, and the car ECU is connected to the BCALL display light circuit; The SOS switch circuit includes a resistor R114, one end of which is connected to the SOS control output end, one end of which is grounded via a capacitor C125, and the other end of which is connected to the base of an eighth switch tube Q8, which is an NPN type band-blocking transistor Q8, the emitter of which is grounded, the collector of which is connected to one end of a resistor R73, and the other end of which is used as a switch signal output end of the SOS switch circuit; the collector of which is also grounded via a capacitor C101; the BCALL switch circuit includes a resistor R122, one end of which is connected to the BCALL control output end, the other end of which is grounded via a capacitor C126, and the The other end of the resistor R122 is grounded after passing through the capacitor C79; the other end of the resistor R122 is connected to the base of the ninth switch tube Q9, which is an NPN type band-blocking transistor Q9, the emitter of the band-blocking transistor Q9 is grounded, the collector of the band-blocking transistor Q9 is connected to one end of the resistor R70, the other end of the resistor R70 serves as the switch signal output end of the BCALL switch circuit, and the collector of the band-blocking transistor Q9 is also grounded after passing through the capacitor C98; the other end of the resistor R70 is connected to one end of the protection diode ESD2, and the other end of the protection diode ESD2 is connected to the other end of the resistor R73; the other end of the resistor R70 is grounded through the capacitor C80; the other end of the resistor R70 is connected to the other end of the resistor R73; The SOS display light circuit includes a diode D5, the anode of which is connected to the SOS alarm display terminal of the automobile ECU, the anode of which is grounded via a capacitor C72, the cathode of which is connected to the anode of a light-emitting diode LED7 via a parallel resistor formed by a resistor R82 and a resistor R138 connected in parallel, and the cathode of which is grounded; two ends of the light-emitting diode LED7 are connected in parallel with a resistor R83 and a capacitor C66; The BCALL display light circuit includes a diode D7, the positive electrode of which is connected to the BCALL alarm display terminal of the automobile ECU, and the positive electrode of the diode D7 is also grounded after passing through a capacitor C50. The negative electrode of the diode D7 is connected to the positive electrode of the light-emitting diode LED8 after passing through a resistor R86, and the negative electrode of the light-emitting diode LED8 is grounded; a resistor R42 and a capacitor C77 are connected in parallel at both ends of the light-emitting diode LED8.

4. The multifunctional integrated control system for automobile ceiling lights according to claim 1, characterized in that: The key backlight indication module includes a key backlight circuit, and the key backlight circuit includes at least a left reading light key backlight circuit, a reading light full-bright touch key backlight circuit, and a right reading light key backlight circuit; The left reading light button background light circuit comprises a light emitting diode LED5, the anode of the light emitting diode LED5 is connected to the VS output end of the power module through a resistor R49 and a resistor R51 connected in parallel; the VS output end is grounded through a capacitor C42; the cathode of the light emitting diode LED5 is connected to the collector of an NPN resistor transistor Q22, the base of the NPN resistor transistor Q22 is connected to one end of a resistor R18, the other end of the resistor R18 is connected to the left reading light button background light control output end ILL_LH_ctr of the car ceiling light MCU, the common end of the resistor R18 and the base of the NPN resistor transistor Q22 is grounded through a capacitor C63, the other end of the resistor R18 is grounded through a capacitor C21, the emitter of the NPN resistor transistor Q22 is grounded, and the collector of the NPN resistor transistor Q22 is connected to the cathode of the light emitting diode LED5; capacitor C24 and resistor R109 are connected in parallel at both ends of the light emitting diode LED5; The reading light full-bright touch key background light circuit includes a light-emitting diode LED6 and an NPN resistor transistor Q25, the anode of the light-emitting diode LED6 is connected to the VS output end of the power module through a resistor R58 and a resistor R62 connected in parallel; the VS output end of the power module is grounded through a capacitor C42; the base of the NPN resistor transistor Q25 is connected to one end of the resistor R21, and the other end of the resistor R21 is connected to the reading light full-bright key background light control output end ILL_door_ctr of the car ceiling light MCU, the resistor R21 and the NPN resistor transistor Q22 base common end are grounded through a capacitor C64, the other end of the resistor R21 is grounded through a capacitor C29, the emitter of the NPN resistor transistor Q25 is grounded, and the collector of the NPN resistor transistor Q25 is connected to the cathode of the light-emitting diode LED6; the two ends of the light-emitting diode LED6 are connected in parallel with a capacitor C31 and a resistor R110; The right reading light button background light circuit includes a light emitting diode LED2, the anode of the light emitting diode LED2 is connected to one end of a third voltage-dividing resistor formed by resistors R40 and R41 in parallel, and the other end of the third voltage-dividing resistor formed by resistors R40 and R41 in parallel is connected to the collector of the PNP transistor Q10; the emitter of the PNP transistor Q10 is the VS output end of the power module, the base of the PNP transistor Q10 is connected to the collector of the resistor transistor Q18 via the resistor R117, the emitter of the resistor transistor Q18 is grounded, and the The base is connected to the right reading light button background light control output terminal SWDCLK&ILL_RH_ctr of the car ceiling light MCU through resistor R16, and the collector of the resistor transistor Q18 is connected to the VS output terminal of the power module through resistor R115; the anode of the light-emitting diode LED2 is connected to the emitter of the PNP transistor Q33, the collector of the PNP transistor Q33 is grounded, and the base of the PNP transistor Q33 is grounded through resistor R118 and capacitor C19; a resistor R119 is arranged between the base and the emitter of the PNP transistor Q33.

5. The multifunctional integrated control system for automobile ceiling lights according to claim 1 is characterized in that: The seat belt and airbag indication module includes an airbag background light indication drive circuit, an airbag disable indication drive circuit, an airbag enable indication drive circuit, and a seat belt reminder drive circuit; The signal input end of the airbag background light indication driving circuit is used to be connected to the airbag background light control output end of the automobile ceiling light MCU, and the driving output end of the airbag background light indication driving circuit is connected to the airbag background light indication circuit; The signal input end of the airbag disabling indication driving circuit is used to be connected to the airbag disabling control output end of the automobile dome light MCU, the driving output end of the airbag disabling indication driving circuit is connected to the airbag disabling indication circuit, an airbag disabling self-diagnosis point is provided between the airbag disabling indication driving circuit and the airbag disabling indication circuit, and the airbag disabling self-diagnosis point is used to be connected to the airbag disabling diagnosis acquisition end of the automobile dome light MCU after passing through the airbag disabling acquisition circuit; The signal input end of the airbag activation indication drive circuit is used to connect with the airbag activation control output end of the automobile dome light MCU, the driving output end of the airbag activation indication drive circuit is connected with the airbag activation indication circuit, an airbag activation self-diagnosis point is provided between the airbag activation indication drive circuit and the airbag activation indication circuit, and the airbag activation self-diagnosis point is used to connect with the airbag activation diagnosis acquisition end of the automobile dome light MCU after passing through the airbag activation acquisition circuit; The signal input end of the seat belt reminder drive circuit is used to connect with the seat belt control output end of the car ceiling light MCU, the drive output end of the seat belt reminder drive circuit is connected with the seat belt reminder indication circuit, and a seat belt reminder self-diagnosis point is arranged between the seat belt reminder drive circuit and the seat belt reminder indication circuit, and the seat belt reminder self-diagnosis point is used to connect with the seat belt reminder diagnosis collection end of the car ceiling light MCU after passing through the seat belt reminder collection circuit.

6. The multifunctional integrated control system for automobile ceiling lights according to claim 5, characterized in that: The airbag backlight indication driving circuit includes a resistor R104, one end of the resistor R104 is used as the signal input end of the airbag backlight indication driving circuit, one end of the resistor R104 is also grounded via a capacitor C82, the other end of the resistor R104 is connected to the base of a resistor transistor Q13, the emitter of the resistor transistor Q13 is grounded, the collector of the resistor transistor Q13 is connected to the base of a PNP transistor Q38 via a resistor R89, the common end of the PNP transistor Q38 and the resistor R89 ​​is also connected to the VS output end of the power module via a resistor R84, the emitter of the PNP transistor Q38 is connected to the VS output end of the power module, the collector of the PNP transistor Q38 is connected to one end of a resistor R29, the other end of the resistor R29 is grounded via a resistor R38 and a capacitor C35 respectively, and the other end of the resistor R29 is also used as the safety airbag backlight indication driving circuit. The driving output end of the airbag background light indication driving circuit; the airbag background light indication circuit comprises a light emitting diode LED9, a light emitting diode LED10, and a light emitting diode LED11 connected in series in sequence, a capacitor C97 is connected in parallel at both ends of the light emitting diode LED9, a capacitor C118 is connected in parallel at both ends of the light emitting diode LED10, a capacitor C56 is connected in parallel at both ends of the light emitting diode LED11, the cathode of the light emitting diode LED11 is grounded, and the anode of the light emitting diode LED9 is connected to the other end of the resistor R29; The airbag disabling indication driving circuit includes a resistor R113, one end of the resistor R113 is used as a signal input end of the airbag disabling indication driving circuit, one end of the resistor R113 is also grounded via a capacitor C74, the other end of the resistor R113 is grounded via a capacitor C106, and the other end of the resistor R113 is connected to a resistor transistor Q19 The base of the resistor transistor Q19 is grounded, the collector of the resistor transistor Q19 is connected to the base of the PNP transistor Q41 via the resistor R105, and the base of the PNP transistor Q41 is also connected to the VS output end of the power module via the resistor R90; the emitter of the PNP transistor Q41 is connected to the VS output end of the power module, the collector of the PNP transistor Q41 is connected to one end of the resistor R93 and the resistor 94 connected in parallel, and the other end thereof serves as the driving output end of the airbag disabling indication driving circuit; the airbag disabling indication circuit includes a light emitting diode LED12, and the two ends of the light emitting diode LED12 are connected in parallel with resistors R91 and Capacitor C55, the anode of the light-emitting diode LED12 is connected to the driving output end of the airbag disabling indication driving circuit, and the cathode of the light-emitting diode LED12 is grounded; the airbag disabling acquisition circuit includes a resistor R31, one end of the resistor R31 is connected to the airbag disabling self-diagnosis point, the other end of the resistor R31 is grounded via a resistor R68 and a capacitor C94, the other end of the resistor R31 is also grounded via a resistor R68 and a capacitor C93, the other end of the resistor R31 is also grounded via a capacitor C3, the resistor R31 is also grounded via a resistor R74, and the common end of the resistor R68 and the capacitor C94 is used to connect to the airbag disabling diagnosis acquisition end of the automobile ceiling light MCU; The airbag activation indication driving circuit includes a resistor R124, one end of which serves as a signal input end of the airbag activation indication driving circuit, one end of which is also grounded via a capacitor C84, the other end of which is grounded via a capacitor C109, the other end of which is connected to the base of a resistor transistor Q16, the emitter of which is grounded, the collector of which is connected to the base of a PNP transistor Q44 via a resistor R121, the base of which is also connected to the VS output end of the power module via a resistor R112; the emitter of the PNP transistor Q44 is connected to the VS output end of the power module, the collector of the PNP transistor Q44 is connected to one end of a resistor R96 and a resistor 97 connected in parallel, and the other end of which serves as the airbag activation indication driving circuit. The driving output end of the indicating driving circuit; the airbag activation indicating circuit comprises a light emitting diode LED13, and a resistor R98 and a capacitor C58 are connected in parallel at both ends of the light emitting diode LED13, the anode of the light emitting diode LED13 is connected to the driving output end of the airbag activation indicating driving circuit, and the cathode of the light emitting diode LED13 is grounded; the airbag activation acquisition circuit comprises a resistor R76, one end of which is connected to the airbag activation self-diagnosis point, the other end of the resistor R76 is grounded via a resistor R77 and a capacitor C113, the other end of the resistor R76 is also grounded via a resistor R77 and a capacitor C114, the other end of the resistor R76 is also grounded via a capacitor C49, the resistor R76 is also grounded via a resistor R80, and the common end of the resistor R77 and the capacitor C114 is used to be connected to the airbag activation diagnosis acquisition end of the automobile ceiling light MCU; The seat belt reminder driving circuit includes a resistor R126, one end of the resistor R126 serves as the signal input end of the seat belt reminder driving circuit, one end of the resistor R126 is also grounded via a capacitor C83, the other end of the resistor R126 is grounded via a capacitor C108, the other end of the resistor R126 is connected to the base of a resistor transistor Q15, the emitter of the resistor transistor Q15 is grounded, the collector of the resistor transistor Q15 is connected to the base of a PNP transistor Q45 via a resistor R125, the base of the PNP transistor Q45 is also connected to the VS output end of the power module via a resistor R123; the emitter of the PNP transistor Q45 is connected to the VS output end of the power module, the collector of the PNP transistor Q45 is connected to one end of a resistor R101, and the other end serves as the driving output end of the seat belt reminder driving circuit; the seat belt reminder indication circuit includes a light emitting diode LED14, a light emitting diode LED15, and a light emitting diode LED1 connected in series in sequence. 6; capacitor C68 is connected in parallel at both ends of the light emitting diode LED14, capacitor C104 is connected in parallel at both ends of the light emitting diode LED15, capacitor C105 is connected in parallel at both ends of the light emitting diode LED16, the anode of the light emitting diode LED14 is connected to the seat belt reminder self-diagnosis point, the cathode of the light emitting diode LED16 is grounded, the anode of the light emitting diode LED14 is connected to the cathode of the light emitting diode LED16 after passing through the resistor R106; the seat belt reminder acquisition circuit includes a resistor R71, one end of the resistor R71 is connected to the seat belt reminder self-diagnosis point, the other end of the resistor R71 is grounded through a resistor R72 and a capacitor C112, the other end of the resistor R71 is also grounded through a resistor R72 and a capacitor C111, the other end of the resistor R71 is also grounded through a capacitor C38, and the other end of the resistor R71 is also grounded through a resistor R75; the common end of the resistor R72 and the capacitor C111 is used to connect to the seat belt reminder diagnosis acquisition end of the car ceiling light MCU.

7. The multifunctional integrated control system for automobile ceiling lights according to claim 1, characterized in that: The atmosphere light module includes a first atmosphere light group and a second atmosphere light group; Each group of ambient light lamps is provided with three branch circuits: a green light circuit, a red light circuit, and a blue light circuit; each branch circuit is provided with an ambient light driving circuit and an ambient light display circuit which are sequentially connected to the car ceiling light MCU; The atmosphere light driving circuit of the green light circuit in the first atmosphere light group includes an impedance transistor Q7, the base of the impedance transistor Q7 is connected to one end of a resistor R60, the other end of the resistor R60 is grounded via a capacitor C103, and the other end of the resistor R60 is also connected to the green atmosphere light control output terminal Green of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q7 is grounded via the capacitor C67, the emitter of the impedance transistor Q7 is grounded, the collector of the impedance transistor Q7 is respectively connected to the collector of the PNP transistor Q12 and the base of the PNP transistor Q17 via the resistor R30, the emitter of the transistor Q12 is connected to the VS output end of the power module, the base of the transistor Q12 is connected to the emitter of the transistor Q17, a resistor R39 is connected between the emitter and the base of the transistor Q12, the collector of the transistor Q17 is connected to one end of the resistor R44, the other end of the resistor R44 is grounded via the capacitor C41, and the other end of the resistor R44 serves as the driving output end AL G1+ of the atmosphere lamp driving circuit of the green light circuit in the first atmosphere lamp group; The atmosphere light driving circuit of the green light circuit in the second atmosphere light group includes an impedance transistor Q29, the base of the impedance transistor Q29 is connected to one end of a resistor R60, the other end of the resistor R60 is grounded via a capacitor C103, and the other end of the resistor R60 is also connected to the green atmosphere light control output terminal Green of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q29 is grounded via the capacitor C110, the emitter of the impedance transistor Q29 is grounded, the collector of the impedance transistor Q29 is respectively connected to the collector of the PNP transistor Q30 and the base of the PNP transistor Q35 via the resistor R59, the emitter of the transistor Q30 is connected to the VS output end of the power module, the base of the transistor Q30 is connected to the emitter of the transistor Q35, a resistor R63 is connected between the emitter and the base of the transistor Q30, the collector of the transistor Q35 is connected to one end of the resistor R64, the other end of the resistor R64 is grounded via the capacitor C99, and the other end of the resistor R64 serves as the driving output end AL G2+ of the atmosphere lamp driving circuit of the green light circuit in the second atmosphere lamp group; The atmosphere light driving circuit of the red light circuit in the first atmosphere light group includes an impedance transistor Q20, the base of the impedance transistor Q20 is connected to one end of a resistor R66, the other end of the resistor R66 is grounded via a capacitor C116, and the other end of the resistor R66 is also connected to the red atmosphere light control output terminal Red of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q20 is grounded via the capacitor C81, the emitter of the impedance transistor Q20 is grounded, the collector of the impedance transistor Q20 is respectively connected to the collector of the PNP transistor Q21 and the base of the PNP transistor Q24 via the resistor R46, the emitter of the transistor Q21 is connected to the VS output end of the power module, the base of the transistor Q21 is connected to the emitter of the transistor Q24, a resistor R48 is connected between the emitter and the base of the transistor Q21, the collector of the transistor Q24 is connected to one end of the resistor R50, the other end of the resistor R50 is grounded via the capacitor C76, and the other end of the resistor R50 serves as the driving output end AL R1+ of the atmosphere lamp driving circuit of the red light circuit in the first atmosphere lamp group; The atmosphere light driving circuit of the red light circuit in the second atmosphere light group includes an impedance transistor Q36, the base of the impedance transistor Q36 is connected to one end of a resistor R66, the other end of the resistor R66 is grounded via a capacitor C116, and the other end of the resistor R66 is also connected to the red atmosphere light control output terminal Red of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q36 is grounded via the capacitor C117, the emitter of the impedance transistor Q36 is grounded, the collector of the impedance transistor Q36 is respectively connected to the collector of the PNP transistor Q37 and the base of the PNP transistor Q39 via the resistor R65, the emitter of the transistor Q37 is connected to the VS output end of the power module, the base of the transistor Q37 is connected to the emitter of the transistor Q39, a resistor R67 is connected between the emitter and the base of the transistor Q37, the collector of the transistor Q39 is connected to one end of the resistor R81, the other end of the resistor R81 is grounded via the capacitor C115, and the other end of the resistor R81 serves as the driving output end AL R2+ of the atmosphere lamp driving circuit of the red light circuit in the second atmosphere lamp group; The atmosphere light driving circuit of the blue light circuit in the first atmosphere light group includes an impedance transistor Q26, the base of the impedance transistor Q26 is connected to one end of a resistor R95, the other end of the resistor R95 is grounded via a capacitor C120, and the other end of the resistor R95 is also connected to the blue atmosphere light control output terminal Blue of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q26 is grounded via the capacitor C89, the emitter of the impedance transistor Q26 is grounded, the collector of the impedance transistor Q26 is respectively connected to the collector of the PNP transistor Q27 and the base of the PNP transistor Q28 via the resistor R52, the emitter of the transistor Q27 is connected to the VS output end of the power module, the base of the transistor Q27 is connected to the emitter of the transistor Q28, a resistor R63 is connected between the emitter and the base of the transistor Q27, the collector of the transistor Q28 is connected to one end of the resistor R55, the other end of the resistor R55 is grounded via the capacitor C85, and the other end of the resistor R55 serves as the driving output end AL B1+ of the atmosphere lamp driving circuit of the blue lamp circuit in the first atmosphere lamp group; The atmosphere light driving circuit of the blue light circuit in the second atmosphere light group includes an impedance transistor Q40, the base of the impedance transistor Q40 is connected to one end of a resistor R95, the other end of the resistor R95 is grounded via a capacitor C120, and the other end of the resistor R95 is also connected to the blue atmosphere light control output terminal Blue of the car ceiling light MCU. ctr is connected, the base of the impedance transistor Q40 is grounded via the capacitor C121, the emitter of the impedance transistor Q40 is grounded, the collector of the impedance transistor Q40 is respectively connected to the collector of the PNP transistor Q42 and the base of the PNP transistor Q43 via the resistor R87, the emitter of the transistor Q42 is connected to the VS output end of the power module, the base of the transistor Q42 is connected to the emitter of the transistor Q43, a resistor R99 is connected between the emitter and the base of the transistor Q42, the collector of the transistor Q43 is connected to one end of the resistor R102, the other end of the resistor R102 is grounded via the capacitor C119, and the other end of the resistor R102 serves as the driving output end AL B2+ of the atmosphere lamp driving circuit of the blue light circuit in the second atmosphere lamp group.

8. The multifunctional integrated control system for automobile ceiling lights according to claim 1, characterized in that: The chip model of the car ceiling light MCU is: ATSAMHA1, and a PWM regulator is arranged inside the car ceiling light MCU.

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