Distributed OHC ceiling lamp control system

Abstract

A distributed OHC ceiling lamp control system comprises a ceiling lamp controller OHC, the ceiling lamp controller OHC is connected with a central electronic controller CEM through an LIN line, information interaction between the ceiling lamp controller OHC and the central electronic controller CEM follows an LIN communication protocol, and the distributed OHC ceiling lamp control system is characterized in that the ceiling lamp controller OHC comprises a state indicator module and a ceiling lamp module, the state indicator module receives an LIN signal from the central electronic controller CEM, processes the LIN signal and transmits the processed LIN signal to the ceiling lamp module, and the ceiling lamp module drives the state display of the ceiling lamp through the driving circuit. The state indicator module is composed of a state indicator MCU, an LIN signal input circuit and an LIN signal output circuit, the state indicator MCU is in bidirectional connection with the central electronic controller CEM through the LIN signal input circuit, and the state indicator MCU is in bidirectional connection with the ceiling lamp module through the LIN signal output circuit. The beneficial effects are that the structure is simple, operation is convenient, wire harness consumption can be reduced to a certain extent, and space and pin resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile ceiling light control, in particular to a distributed OHC ceiling light control system. Background Art

[0002] As one of the important display and decoration parts in existing vehicles, car ceiling lights play an important role in vehicle processing and use. At present, car ceiling lights are generally composed of reading lights and atmosphere lights. In the existing technology, OHC (Over Head Console) top control terminal system is usually used to realize the control function of car ceiling lights, but traditional OHC control often has the problem of insufficient space and pin resources.

[0003] Disadvantages of existing technology: Traditional OHC control has the problem of insufficient space and pin resources. Utility Model Content

[0004] The utility model provides a distributed OHC ceiling light control system which has a simple structure and is easy to operate, and can reduce wire harness consumption to a certain extent, thereby saving space and pin resources.

[0005] The utility model provides a distributed OHC ceiling light control system, comprising a ceiling light controller OHC, wherein the ceiling light controller OHC is connected to a central electronic controller CEM via a LIN line, and information interaction between the two follows the LIN communication protocol, wherein the key is that the ceiling light controller OHC comprises a status indicator module and a ceiling light module, wherein the status indicator module receives a LIN signal from the central electronic controller CEM, processes the LIN signal, and then transmits the signal to the ceiling light module, and the ceiling light module drives the ceiling light status display via a driving circuit.

[0006] Through the above design, the information transmission between the central electronic controller CEM, the status indicator module and the ceiling light module is carried out through the LIN signal, that is, the information interaction between the status indicator module and the ceiling light module is carried out using a LIN line, which reduces the wiring harness consumption to a certain extent and saves space and pin resources.

[0007] The central electronic controller CEM is an external module of the distributed OHC ceiling light control system. The central electronic controller CEM sends a LIN signal to the status indicator module via a LIN line to control the display of the status indicator and the functional logic of the ambient light and reading light in the ceiling light.

[0008] Preferably, the status indicator module is composed of a status indicator MCU, a LIN signal input circuit and a LIN signal output circuit; the status indicator MCU is bidirectionally connected to the central electronic controller CEM via the LIN signal input circuit; and the status indicator MCU is bidirectionally connected to the ceiling light module via the LIN signal output circuit.

[0009] Through the above design, the status indicator MCU communicates bidirectionally with the central electronic controller CEM via the LIN signal input circuit, and the status indicator MCU communicates bidirectionally with the ceiling light module via the LIN signal output circuit;

[0010] The status indicator MCU performs protocol conversion on the LIN signal received from the central electronic controller CEM and sends it to the ceiling light module, thereby controlling the functional logic and status display of the ceiling light; the ceiling light module feeds back data information such as the touch status, switch status, brightness status, color status, etc. of the ceiling light to the status indicator MCU, which is then fed back to the central electronic controller CEM by the status indicator MCU.

[0011] Preferably, the LIN signal input circuit is composed of a protocol conversion chip IC2, a capacitor C32, a magnetic bead FB2 and a bidirectional voltage regulator diode ESD3;

[0012] The front end of the magnetic bead FB2 is connected to the central electronic controller CEM, the front end of the magnetic bead FB2 is also connected in series with a bidirectional voltage regulator diode ESD3 and then grounded, the rear end of the magnetic bead FB2 is connected to the input end of the protocol conversion chip IC2, and the rear end of the magnetic bead FB2 is also connected in series with a capacitor C32 and then grounded;

[0013] The second communication terminal group of the protocol conversion chip IC2 is connected to the second data terminal group of the status indicator MCU, that is, the 2-1 communication terminal RxD of the protocol conversion chip IC2 is connected to the 2-1 data terminal PTB0 of the status indicator MCU, and the 2-2 communication terminal TxD of the protocol conversion chip IC2 is connected to the 2-2 data terminal PTB1 of the status indicator MCU; the driving terminal EN of the protocol conversion chip IC2 is connected to the 2-3 data terminal PTD2 of the status indicator MCU, and the chip select terminal NRES of the protocol conversion chip IC2 is connected to the 2-4 data terminal PTD3 of the status indicator MCU;

[0014] The LIN signal input circuit realizes the connection between the central electronic controller CEM and the status indicator MCU, facilitates the LIN signal transmission between the central electronic controller CEM and the status indicator MCU, and has a filtering function, which can improve the LIN signal quality.

[0015] The LIN signal output circuit is composed of a protocol conversion chip IC1, a capacitor C13, a magnetic bead FB1 and a bidirectional voltage regulator diode ESD2;

[0016] The front end of the magnetic bead FB1 is connected to the ceiling light module, the front end of the magnetic bead FB1 is also connected in series with a bidirectional voltage regulator diode ESD2 and then grounded, the rear end of the magnetic bead FB1 is connected to the input end of the protocol conversion chip IC1, and the rear end of the magnetic bead FB1 is also connected in series with a capacitor C13 and then grounded;

[0017] The first communication terminal group of the protocol conversion chip IC1 is connected to the first data terminal group of the status indicator MCU, that is, the 1-1 communication terminal RxD of the protocol conversion chip IC1 is connected to the 1-1 data terminal PTD6 of the status indicator MCU, and the 1-2 communication terminal TxD of the protocol conversion chip IC1 is connected to the 1-2 data terminal PTC7 of the status indicator MCU; the driving terminal EN of the protocol conversion chip IC1 is connected to the 1-3 data terminal PTE5 of the status indicator MCU, and the chip select terminal NRES of the protocol conversion chip IC2 is connected to the 1-4 data terminal PTE4 of the status indicator MCU.

[0018] The LIN signal output circuit realizes the connection between the ceiling light module and the status indicator MCU, facilitates the information interaction between the ceiling light module and the status indicator MCU, and has a filtering function, which can improve the signal transmission quality.

[0019] Preferably, the ceiling light module includes a ceiling light MCU, a ceiling light touch function circuit, a front ceiling light and a rear ceiling light. The front ceiling light and the rear ceiling light have the same structure and are both composed of a reading light and an atmosphere light.

[0020] The LIN terminal of the ceiling light MCU is connected to the status indicator module, the touch input terminal of the ceiling light MCU is connected to the ceiling light touch function circuit, the reading light driving terminal of the ceiling light MCU drives the reading light via the reading light driving circuit, and the atmosphere light driving terminal of the ceiling light MCU drives the atmosphere light via the atmosphere light driving circuit.

[0021] The ceiling light MCU is used to receive a touch action signal from the ceiling light touch function circuit and a LIN signal from the status indicator MCU, and drive the ceiling light to display the corresponding status according to the received signal.

[0022] Preferably, the ceiling light touch function circuit is provided with a resistor R13, a magnetic bead FB1 and a touch source X5;

[0023] The front end of the resistor R13 is connected to the touch source X5 in series with a magnetic bead FB1, and the rear end is connected to the touch input terminal.

[0024] The touch source is used to obtain a human finger sensing signal, and the ceiling light touch function circuit is used for the operator to control the status display of the ceiling light through a touch action. When a touch action occurs, the ceiling light touch function circuit sends a touch action signal to the ceiling light MCU, and the ceiling light MCU transmits the touch action signal to the status indicator MCU. The status indicator MCU processes the touch action signal to obtain a processed touch action signal, and feeds the processed touch action signal back to the ceiling light MCU. The ceiling light MCU drives the ceiling light to display the corresponding status according to the processed touch action signal.

[0025] Preferably, the reading light driving circuit is composed of a chip IC5, a resistor R5, a resistor R43, a resistor R47, a capacitor C36 and a capacitor C38;

[0026] The front end of the resistor R43 is connected to the reading light driving end, the front end of the resistor R43 is also connected in series with a capacitor C38 and then grounded, the rear end is connected to the driving end of the chip IC5, the output end of the chip IC5 is connected to the reading light, the output end of the chip IC5 is also connected in series with a capacitor C36 and then grounded, the current limiting pin ISET of the chip IC5 is connected in series with a resistor R47 and then grounded, and the current limiting pin ISET of the chip IC5 is connected in series with a resistor R5 and then grounded.

[0027] The reading light driving circuit is used to drive the status display of the reading light.

[0028] As a preferred embodiment: the reading light is composed of a light emitting diode LED2, a capacitor C40 and a resistor R57;

[0029] The anode of the light emitting diode LED2 is connected to a power source, and the cathode is connected to the reading light driving circuit. A capacitor C40 is connected in parallel between the anode and cathode of the light emitting diode LED2. A resistor R57 is also connected in parallel between the anode and cathode of the light emitting diode LED2.

[0030] Preferably, the atmosphere lamp driving circuit is composed of a capacitor C14, a capacitor C15, a resistor R11, a resistor R21, a resistor R10, a resistor R16, a resistor R17, an NPN transistor Q1, a PNP transistor Q2 and a PNP transistor Q3;

[0031] The front end of the resistor R11 is connected to the driving end of the atmosphere lamp, the front end of the resistor R11 is also connected in series with a capacitor C14 and then grounded, the rear end of the resistor R11 is connected to the base of the transistor Q1, the rear end of the resistor R11 is also connected in series with a capacitor C15 and then grounded, and the rear end of the resistor R11 is also connected in series with a resistor R21 and then grounded; the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to the front end of the resistor R10, the rear end of the resistor R10 is connected to the collector of the transistor Q2, and the rear end of the resistor R10 is also connected to the base of the transistor Q3; the emitter of the transistor Q2 is connected to the power supply, the base of the transistor Q2 is connected in series with a resistor R16 and then connected to the power supply, the base of the transistor Q2 is also connected to the emitter of the transistor Q3, the collector of the transistor Q3 is connected in series with a resistor R17 and then connected to the anode of the atmosphere lamp, and the cathode of the atmosphere lamp is grounded.

[0032] The atmosphere light driving circuit is used to drive the atmosphere light to display according to a preset display state.

[0033] Preferably: the atmosphere light is composed of N atmosphere lamp beads connected in series in sequence, and each atmosphere lamp bead is composed of three RGB LED lamp beads; the ceiling light MCU is provided with three RGB atmosphere light driving ends, each atmosphere light driving end is connected to the input end of an atmosphere light driving circuit, the output end of the atmosphere light driving circuit is connected to the anode of the first LED lamp bead, and the cathode of the Nth LED lamp bead is grounded.

[0034] Through the above design, different ambient light driving ends are used to drive LED lamp beads of different colors, thereby achieving precise control of LED lamp beads of different colors and improving the status display effect of the ambient light.

[0035] Preferably, the ceiling light controller OHC further comprises a power module, which is composed of a status indicator power module and a ceiling light power module, wherein the status indicator power module supplies power to the status indicator module, and the ceiling light power module supplies power to the ceiling light module;

[0036] The state indicator power supply module is composed of a diode D1, a capacitor C12, a capacitor C14, a capacitor C17, a capacitor C20, an electrolytic capacitor C15 and a bidirectional breakdown diode D3;

[0037] The cathode of the diode D1 is connected to a power supply, the cathode of the diode D1 is connected in series with a capacitor C14 and then grounded, the cathode of the diode D1 is also connected in series with an electrolytic capacitor C15 and then grounded, and the cathode of the diode D1 is also connected in series with a capacitor C17 and then grounded; the anode of the diode D1 is connected to a load, the anode of the diode D1 is also connected in series with a capacitor C12 and a capacitor C20 in sequence and then grounded, and the anode of the diode D1 is also connected in series with a bidirectional breakdown diode D3 and then grounded;

[0038] The ceiling light power module is composed of an inductor L1, a diode D34, an electrolytic capacitor C2, a capacitor C50, a capacitor C48, a capacitor C47, and a bidirectional breakdown diode D18;

[0039] The front end of the inductor L1 is connected to a power supply, the front end of the inductor L1 is also connected in series with a capacitor C50 and then grounded, the front end of the inductor L1 is also connected in series with an electrolytic capacitor C2 and then grounded, the rear end of the inductor L1 is connected to the cathode of a diode D34, the rear end of the inductor L1 is also connected in series with a capacitor C48 and then grounded; the anode of the diode D34 is connected to a load, the anode of the diode D34 is connected in series with capacitors C47 and C53 in sequence and then grounded, and the anode of the diode D34 is also connected in series with a bidirectional breakdown diode D18 and then grounded.

[0040] The status indicator power supply module is used to supply power to the status indicator module, and the ceiling light power supply module is used to supply power to the ceiling light module.

[0041] The utility model has the beneficial effects of simple structure, easy operation, ability to reduce wire harness consumption to a certain extent, and saving space and pin resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0043] Figure 2 This is the schematic diagram of the status indicator MCU chip;

[0044] Figure 3 This is the circuit diagram for LIN signal input;

[0045] Figure 4 This is the LIN signal output circuit diagram;

[0046] Figure 5 This is the schematic diagram of the ceiling light MCU chip;

[0047] Figure 6 This is the circuit diagram of the ceiling light touch function;

[0048] Figure 7 This is the reading light driving circuit diagram;

[0049] Figure 8 This is the circuit diagram of the reading light;

[0050] Fig. 9 This is the circuit diagram of the ambient light driver;

[0051] Fig.10 This is the circuit diagram of the atmosphere light;

[0052] Fig.11 It is the circuit diagram of the power module of the status indicator;

[0053] Fig.12 This is the circuit diagram of the ceiling light power module. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below in conjunction with the accompanying drawings and specific examples. The following embodiments or drawings are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0055] like Figure 1 As shown: a distributed OHC ceiling light control system, including a ceiling light controller OHC, the ceiling light controller OHC is connected to the central electronic controller CEM through a LIN line, and the information exchange between the two follows the LIN communication protocol. The key is: the ceiling light controller OHC includes a status indicator module and a ceiling light module, the status indicator module receives the LIN signal from the central electronic controller CEM, and after signal processing of the LIN signal, it is transmitted to the ceiling light module, and the ceiling light module drives the ceiling light status display through the driving circuit.

[0056] The status indicator module is composed of a status indicator MCU, a LIN signal input circuit and a LIN signal output circuit;

[0057] The state indicator MCU is bidirectionally connected to the central electronic controller CEM via a LIN signal input circuit, and the state indicator MCU is bidirectionally connected to the ceiling light module via a LIN signal output circuit.

[0058] like Figure 2 , Figure 3 As shown: the LIN signal input circuit is composed of a protocol conversion chip IC2, a capacitor C32, a magnetic bead FB2 and a bidirectional voltage regulator diode ESD3;

[0059] The front end of the magnetic bead FB2 is connected to the central electronic controller CEM, the front end of the magnetic bead FB2 is also connected in series with a bidirectional voltage regulator diode ESD3 and then grounded, the rear end of the magnetic bead FB2 is connected to the input end of the protocol conversion chip IC2, and the rear end of the magnetic bead FB2 is also connected in series with a capacitor C32 and then grounded;

[0060] The second communication terminal group of the protocol conversion chip IC2 is connected to the second data terminal group of the status indicator MCU, that is, the 2-1 communication terminal RxD of the protocol conversion chip IC2 is connected to the 2-1 data terminal PTB0 of the status indicator MCU, and the 2-2 communication terminal TxD of the protocol conversion chip IC2 is connected to the 2-2 data terminal PTB1 of the status indicator MCU; the driving terminal EN of the protocol conversion chip IC2 is connected to the 2-3 data terminal PTD2 of the status indicator MCU, and the chip select terminal NRES of the protocol conversion chip IC2 is connected to the 2-4 data terminal PTD3 of the status indicator MCU;

[0061] like Figure 2 , Figure 4 As shown: the LIN signal output circuit is composed of a protocol conversion chip IC1, a capacitor C13, a magnetic bead FB1 and a bidirectional voltage regulator diode ESD2;

[0062] The front end of the magnetic bead FB1 is connected to the ceiling light module, the front end of the magnetic bead FB1 is also connected in series with a bidirectional voltage regulator diode ESD2 and then grounded, the rear end of the magnetic bead FB1 is connected to the input end of the protocol conversion chip IC1, and the rear end of the magnetic bead FB1 is also connected in series with a capacitor C13 and then grounded;

[0063] The first communication terminal group of the protocol conversion chip IC1 is connected to the first data terminal group of the status indicator MCU, that is, the 1-1 communication terminal RxD of the protocol conversion chip IC1 is connected to the 1-1 data terminal PTD6 of the status indicator MCU, and the 1-2 communication terminal TxD of the protocol conversion chip IC1 is connected to the 1-2 data terminal PTC7 of the status indicator MCU; the driving terminal EN of the protocol conversion chip IC1 is connected to the 1-3 data terminal PTE5 of the status indicator MCU, and the chip select terminal NRES of the protocol conversion chip IC2 is connected to the 1-4 data terminal PTE4 of the status indicator MCU.

[0064] like Figure 1 , Figure 5-10 As shown: the ceiling light module includes a ceiling light MCU, a ceiling light touch function circuit, a front ceiling light and a rear ceiling light. The front ceiling light and the rear ceiling light have the same structure, and both consist of a left reading light and a right ambient light.

[0065] The LIN terminal of the ceiling light MCU is connected to the status indicator module, the touch input terminal of the ceiling light MCU is connected to the ceiling light touch function circuit, the reading light driving terminal of the ceiling light MCU drives the reading light via the reading light driving circuit, and the atmosphere light driving terminal of the ceiling light MCU drives the atmosphere light via the atmosphere light driving circuit.

[0066] like Figure 6 As shown: the ceiling light touch function circuit is provided with a resistor R13, a magnetic bead FB1 and a touch source X5;

[0067] The front end of the resistor R13 is connected to the touch source X5 in series with a magnetic bead FB1, and the rear end is connected to the touch input terminal.

[0068] like Figure 7 As shown: the reading light driving circuit is composed of a chip IC5, a resistor R5, a resistor R43, a resistor R47, a capacitor C36 and a capacitor C38;

[0069] The front end of the resistor R43 is connected to the reading light driving end, the front end of the resistor R43 is also connected in series with a capacitor C38 and then grounded, the rear end is connected to the driving end of the chip IC5, the output end of the chip IC5 is connected to the reading light, the output end of the chip IC5 is also connected in series with a capacitor C36 and then grounded, the current limiting pin ISET of the chip IC5 is connected in series with a resistor R47 and then grounded, and the current limiting pin ISET of the chip IC5 is connected in series with a resistor R5 and then grounded.

[0070] like Figure 8 As shown: the reading light is composed of a light emitting diode LED2, a capacitor C40 and a resistor R57;

[0071] The anode of the light emitting diode LED2 is connected to a power source, and the cathode is connected to the reading light driving circuit. A capacitor C40 is connected in parallel between the anode and cathode of the light emitting diode LED2. A resistor R57 is also connected in parallel between the anode and cathode of the light emitting diode LED2.

[0072] like Fig. 9 As shown: the atmosphere lamp driving circuit is composed of a capacitor C14, a capacitor C15, a resistor R11, a resistor R21, a resistor R10, a resistor R16, a resistor R17, an NPN transistor Q1, a PNP transistor Q2 and a PNP transistor Q3;

[0073] The front end of the resistor R11 is connected to the driving end of the atmosphere lamp, the front end of the resistor R11 is also connected in series with a capacitor C14 and then grounded, the rear end of the resistor R11 is connected to the base of the transistor Q1, the rear end of the resistor R11 is also connected in series with a capacitor C15 and then grounded, and the rear end of the resistor R11 is also connected in series with a resistor R21 and then grounded; the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to the front end of the resistor R10, the rear end of the resistor R10 is connected to the collector of the transistor Q2, and the rear end of the resistor R10 is also connected to the base of the transistor Q3; the emitter of the transistor Q2 is connected to the power supply, the base of the transistor Q2 is connected in series with a resistor R16 and then connected to the power supply, the base of the transistor Q2 is also connected to the emitter of the transistor Q3, the collector of the transistor Q3 is connected in series with a resistor R17 and then connected to the anode of the atmosphere lamp, and the cathode of the atmosphere lamp is grounded.

[0074] like Fig.10 As shown: the atmosphere light is composed of N atmosphere lamp beads connected in series in sequence, and each atmosphere lamp bead is composed of three RGB LED lamp beads; the ceiling light MCU is provided with three RGB atmosphere light driving ends, each atmosphere light driving end is connected to the input end of an atmosphere light driving circuit, the output end of the atmosphere light driving circuit is connected to the anode of the first LED lamp bead, and the cathode of the Nth LED lamp bead is grounded.

[0075] like Figure 11-12As shown: the ceiling light controller OHC also includes a power supply module, which is composed of a status indicator power supply module and a ceiling light power supply module. The status indicator power supply module supplies power to the status indicator module, and the ceiling light power supply module supplies power to the ceiling light module.

[0076] like Fig.11 As shown: the status indicator power supply module is composed of a diode D1, a capacitor C12, a capacitor C14, a capacitor C17, a capacitor C20, an electrolytic capacitor C15 and a bidirectional breakdown diode D3;

[0077] The cathode of the diode D1 is connected to a power supply, the cathode of the diode D1 is connected in series with a capacitor C14 and then grounded, the cathode of the diode D1 is also connected in series with an electrolytic capacitor C15 and then grounded, and the cathode of the diode D1 is also connected in series with a capacitor C17 and then grounded; the anode of the diode D1 is connected to a load, the anode of the diode D1 is also connected in series with a capacitor C12 and a capacitor C20 in sequence and then grounded, and the anode of the diode D1 is also connected in series with a bidirectional breakdown diode D3 and then grounded.

[0078] like Fig.12 As shown: the ceiling light power module is composed of an inductor L1, a diode D34, an electrolytic capacitor C2, a capacitor C50, a capacitor C48, a capacitor C47, and a bidirectional breakdown diode D18;

[0079] The front end of the inductor L1 is connected to a power supply, the front end of the inductor L1 is also connected in series with a capacitor C50 and then grounded, the front end of the inductor L1 is also connected in series with an electrolytic capacitor C2 and then grounded, the rear end of the inductor L1 is connected to the cathode of a diode D34, the rear end of the inductor L1 is also connected in series with a capacitor C48 and then grounded; the anode of the diode D34 is connected to a load, the anode of the diode D34 is connected in series with capacitors C47 and C53 in sequence and then grounded, and the anode of the diode D34 is also connected in series with a bidirectional breakdown diode D18 and then grounded.

[0080] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A distributed OHC ceiling light control system, comprising a ceiling light controller OHC, wherein the ceiling light controller OHC is connected to a central electronic controller CEM via a LIN line, and the information exchange between the two follows the LIN communication protocol, and is characterized in that: The ceiling light controller OHC includes a status indicator module and a ceiling light module. The status indicator module receives a LIN signal from a central electronic controller CEM, processes the LIN signal, and transmits it to the ceiling light module. The ceiling light module drives the ceiling light status display via a driving circuit.

2. The distributed OHC ceiling light control system according to claim 1, characterized in that: The status indicator module is composed of a status indicator MCU, a LIN signal input circuit and a LIN signal output circuit; The state indicator MCU is bidirectionally connected to the central electronic controller CEM via a LIN signal input circuit, and the state indicator MCU is bidirectionally connected to the ceiling light module via a LIN signal output circuit.

3. The distributed OHC ceiling light control system according to claim 2 is characterized in that: The LIN signal input circuit is composed of a protocol conversion chip IC2, a capacitor C32, a magnetic bead FB2 and a bidirectional voltage regulator diode ESD3; The front end of the magnetic bead FB2 is connected to the central electronic controller CEM, the front end of the magnetic bead FB2 is also connected in series with a bidirectional voltage regulator diode ESD3 and then grounded, the rear end of the magnetic bead FB2 is connected to the input end of the protocol conversion chip IC2, and the rear end of the magnetic bead FB2 is also connected in series with a capacitor C32 and then grounded; The second communication terminal group of the protocol conversion chip IC2 is connected to the second data terminal group of the status indicator MCU, that is, the 2-1 communication terminal RxD of the protocol conversion chip IC2 is connected to the 2-1 data terminal PTB0 of the status indicator MCU, and the 2-2 communication terminal TxD of the protocol conversion chip IC2 is connected to the 2-2 data terminal PTB1 of the status indicator MCU; the driving terminal EN of the protocol conversion chip IC2 is connected to the 2-3 data terminal PTD2 of the status indicator MCU, and the chip select terminal NRES of the protocol conversion chip IC2 is connected to the 2-4 data terminal PTD3 of the status indicator MCU; The LIN signal output circuit is composed of a protocol conversion chip IC1, a capacitor C13, a magnetic bead FB1 and a bidirectional voltage regulator diode ESD2; The front end of the magnetic bead FB1 is connected to the ceiling light module, the front end of the magnetic bead FB1 is also connected in series with a bidirectional voltage regulator diode ESD2 and then grounded, the rear end of the magnetic bead FB1 is connected to the input end of the protocol conversion chip IC1, and the rear end of the magnetic bead FB1 is also connected in series with a capacitor C13 and then grounded; The first communication terminal group of the protocol conversion chip IC1 is connected to the first data terminal group of the status indicator MCU, that is, the 1-1 communication terminal RxD of the protocol conversion chip IC1 is connected to the 1-1 data terminal PTD6 of the status indicator MCU, and the 1-2 communication terminal TxD of the protocol conversion chip IC1 is connected to the 1-2 data terminal PTC7 of the status indicator MCU; the driving terminal EN of the protocol conversion chip IC1 is connected to the 1-3 data terminal PTE5 of the status indicator MCU, and the chip select terminal NRES of the protocol conversion chip IC2 is connected to the 1-4 data terminal PTE4 of the status indicator MCU.

4. The distributed OHC ceiling light control system according to claim 1, characterized in that: The ceiling light module includes a ceiling light MCU, a ceiling light touch function circuit, a front ceiling light and a rear ceiling light. The front ceiling light and the rear ceiling light have the same structure and are both composed of a reading light and an atmosphere light. The LIN terminal of the ceiling light MCU is connected to the status indicator module, the touch input terminal of the ceiling light MCU is connected to the ceiling light touch function circuit, the reading light driving terminal of the ceiling light MCU drives the reading light via the reading light driving circuit, and the atmosphere light driving terminal of the ceiling light MCU drives the atmosphere light via the atmosphere light driving circuit.

5. The distributed OHC ceiling light control system according to claim 4 is characterized in that: The ceiling light touch function circuit is provided with a resistor R13, a magnetic bead FB1 and a touch source X5; The front end of the resistor R13 is connected to the touch source X5 in series with a magnetic bead FB1, and the rear end is connected to the touch input terminal.

6. The distributed OHC ceiling light control system according to claim 4, characterized in that: The reading light driving circuit is composed of a chip IC5, a resistor R5, a resistor R43, a resistor R47, a capacitor C36 and a capacitor C38; The front end of the resistor R43 is connected to the reading light driving end, the front end of the resistor R43 is also connected in series with a capacitor C38 and then grounded, the rear end is connected to the driving end of the chip IC5, the output end of the chip IC5 is connected to the reading light, the output end of the chip IC5 is also connected in series with a capacitor C36 and then grounded, the current limiting pin ISET of the chip IC5 is connected in series with a resistor R47 and then grounded, and the current limiting pin ISET of the chip IC5 is connected in series with a resistor R5 and then grounded.

7. The distributed OHC ceiling light control system according to claim 4, characterized in that: The reading light is composed of a light emitting diode LED2, a capacitor C40 and a resistor R57; The anode of the light emitting diode LED2 is connected to a power source, and the cathode is connected to the reading light driving circuit. A capacitor C40 is connected in parallel between the anode and cathode of the light emitting diode LED2. A resistor R57 is also connected in parallel between the anode and cathode of the light emitting diode LED2.

8. The distributed OHC ceiling light control system according to claim 4, characterized in that: The atmosphere lamp driving circuit is composed of a capacitor C14, a capacitor C15, a resistor R11, a resistor R21, a resistor R10, a resistor R16, a resistor R17, an NPN transistor Q1, a PNP transistor Q2 and a PNP transistor Q3; The front end of the resistor R11 is connected to the driving end of the atmosphere lamp, the front end of the resistor R11 is also connected in series with a capacitor C14 and then grounded, the rear end of the resistor R11 is connected to the base of the transistor Q1, the rear end of the resistor R11 is also connected in series with a capacitor C15 and then grounded, and the rear end of the resistor R11 is also connected in series with a resistor R21 and then grounded; the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to the front end of the resistor R10, the rear end of the resistor R10 is connected to the collector of the transistor Q2, and the rear end of the resistor R10 is also connected to the base of the transistor Q3; the emitter of the transistor Q2 is connected to the power supply, the base of the transistor Q2 is connected in series with a resistor R16 and then connected to the power supply, the base of the transistor Q2 is also connected to the emitter of the transistor Q3, the collector of the transistor Q3 is connected in series with a resistor R17 and then connected to the anode of the atmosphere lamp, and the cathode of the atmosphere lamp is grounded.

9. The distributed OHC ceiling light control system according to claim 4, characterized in that: The atmosphere light is composed of N atmosphere lamp beads connected in series in sequence, and each atmosphere lamp bead is composed of three RGB LED lamp beads; the ceiling light MCU is provided with three RGB atmosphere light driving ends, each atmosphere light driving end is connected to the input end of an atmosphere light driving circuit, the output end of the atmosphere light driving circuit is connected to the anode of the first LED lamp bead, and the cathode of the Nth LED lamp bead is grounded.

10. The distributed OHC ceiling light control system according to claim 1, characterized in that: The ceiling light controller OHC further comprises a power supply module, which is composed of a status indicator power supply module and a ceiling light power supply module, wherein the status indicator power supply module supplies power to the status indicator module, and the ceiling light power supply module supplies power to the ceiling light module; The state indicator power supply module is composed of a diode D1, a capacitor C12, a capacitor C14, a capacitor C17, a capacitor C20, an electrolytic capacitor C15 and a bidirectional breakdown diode D3; The cathode of the diode D1 is connected to a power supply, the cathode of the diode D1 is connected in series with a capacitor C14 and then grounded, the cathode of the diode D1 is also connected in series with an electrolytic capacitor C15 and then grounded, and the cathode of the diode D1 is also connected in series with a capacitor C17 and then grounded; the anode of the diode D1 is connected to a load, the anode of the diode D1 is also connected in series with a capacitor C12 and a capacitor C20 in sequence and then grounded, and the anode of the diode D1 is also connected in series with a bidirectional breakdown diode D3 and then grounded; The ceiling light power module is composed of an inductor L1, a diode D34, an electrolytic capacitor C2, a capacitor C50, a capacitor C48, a capacitor C47, and a bidirectional breakdown diode D18; The front end of the inductor L1 is connected to a power supply, the front end of the inductor L1 is also connected in series with a capacitor C50 and then grounded, the front end of the inductor L1 is also connected in series with an electrolytic capacitor C2 and then grounded, the rear end of the inductor L1 is connected to the cathode of a diode D34, and the rear end of the inductor L1 is also connected in series with a capacitor C48 and then grounded; The anode of the diode D34 is connected to the load, the anode of the diode D34 is connected in series with the capacitor C47 and the capacitor C53 in sequence and then grounded, and the anode of the diode D34 is also connected in series with the bidirectional breakdown diode D18 and then grounded.

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