A control system and control method for automatic brightening of a rear position lamp of a passenger vehicle

Abstract

The application discloses a control system and a control method for automatically increasing brightness of a rear position lamp of a passenger car, and the control system is composed of a control circuit with multiple O / I interfaces, a position lamp circuit and an internal detection chip, and the control system is an internal circuit collection of a side wall rear position lamp assembly; the control circuit is connected with a rear door switch and the position lamp circuit respectively; the rear door switch is connected with left and right rear position lamps in parallel; the control circuit is connected with the rear door in parallel and is connected with the position lamp circuit through a MOS tube Q21; and the internal detection chip is connected with the position lamp circuit. When the trunk of the passenger car is opened, the brightness of the side wall rear position lamp is automatically increased, the illumination of the single side wall rear position lamp is the same as the illumination of the side wall rear position lamp + the rear door rear position lamp when the trunk is closed, the prompting effect of the rear position lamp is consistent under all road conditions, and the safety of pedestrians and driving is ensured.

Description

Technical Field

[0001] This invention belongs to the field of passenger vehicle lighting control technology, specifically relating to a control system and control method for automatically increasing the brightness of the rear position lights of a passenger vehicle. Background Technology

[0002] Currently, there are two types of rear position lights on passenger vehicles: 1. Rear position lights consisting solely of those mounted on the side panel. This type has a simpler electronic structure and lower electronic costs, but the smaller area of ​​the rear position lights significantly limits design possibilities. As one of the most prominent features of the vehicle's exterior, the rear position lights, despite their cost advantage, are no longer used in some passenger vehicles. 2. Rear position lights consisting of those mounted on the side panel and those mounted on the tailgate. This type offers a wider area and greater design freedom, enhancing the overall appearance. However, this type of rear position light presents a challenge when the vehicle is stationary and the driver opens the trunk. The tailgate position light is lifted along with the trunk, making it difficult for other drivers and pedestrians to see, as only the side panel position lights are visible. This reduces the visibility of the position lights and compromises safety in such situations. Summary of the Invention

[0003] To address the aforementioned issues with rear position lights in passenger vehicles, which consist of side rear position lights and tailgate rear position lights, this invention provides a control system and method for automatically increasing the brightness of rear position lights. When the trunk of a passenger vehicle is opened, the side rear position lights automatically increase their brightness. At this time, the illuminance of the individual side rear position lights is the same as the combined illuminance of the side rear position lights and tailgate rear position lights when the trunk is closed, ensuring consistent warning effects for rear position lights under all road conditions and protecting pedestrian and vehicle safety. Furthermore, this control method is internal to the rear position lights, autonomously increasing brightness after the tailgate is opened, resulting in faster response time. It eliminates the need for vehicle BCM control, is unaffected by the overall vehicle BCM status, reduces the number of control units in the BCM, lowers controller costs, and enhances other aspects of controller performance.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] As a first aspect of the present invention, a control system for automatic incremental rear position lights of a passenger vehicle is provided, comprising a rear position light assembly consisting of a control circuit with multiple O / I interfaces, a position light circuit, and an internal detection chip. The rear position light assembly is an internal circuit collection of the side rear position light assembly. The control circuit is connected to the tailgate switch and the position light circuit respectively. The tailgate switch is connected in parallel with the left and right rear position lights. The control circuit serves as the interface of the rear position light assembly, is connected in parallel with the tailgate, and is connected to the position light circuit through a MOSFET Q21. The internal detection chip is connected to the position light circuit.

[0006] Furthermore, the control circuit includes a tailgate signal line, which is connected in parallel with the tailgate switch.

[0007] Furthermore, the control circuit includes MOSFETs Q13, Q12, and Q21. MOSFET Q13 is connected to ground after being connected in series with a protection resistor R86. The gate of MOSFET Q12 is connected in parallel with the gate of MOSFET Q21 and then in series with the drain of MOSFET Q13. Two anti-interference branches are connected in parallel to form an anti-interference circuit. MOSFET Q21 is connected to the position light circuit.

[0008] Furthermore, in the two sets of anti-interference branches, the first set of anti-interference branches is composed of a 100k resistor R87, a capacitor C64 and a diode Z2 connected in parallel, and the second set of anti-interference branches is composed of a 100k resistor R127 and a capacitor C100 connected in parallel.

[0009] Furthermore, the position light circuit includes current-limiting resistors R75, R69, and R71, as well as two parallel connecting resistors R76 and R74. The current-limiting resistors R75, R69, and R71 are connected in parallel and then in series with the parallel connecting resistors R76 and R74. The parallel connecting resistors R76 and R74 are then connected to the gates of transistor Q9 in the position light circuit and MOSFET Q21 in the control circuit, respectively.

[0010] Furthermore, the internal detection chip is connected to the collector of transistor Q9 in the position lamp circuit, and is connected to the emitter of Q9 through connecting resistors R74 and R76, and then connected to the gate of MOS transistor Q21 in the control circuit.

[0011] As a second aspect of the present invention, a control method for an automatic incremental control system for rear position lights of a passenger vehicle is provided, characterized in that it includes:

[0012] S1. The internal detection chip detects whether the tailgate is open;

[0013] S2. When the internal detection chip detects that the tailgate is closed, the MOS transistor Q21 in the control circuit and the position light circuit are not connected. Under this condition, the brightness of the side rear position light and the tailgate rear position light together provide the position light indication effect.

[0014] S3. When the internal detection chip detects that the rear door is open, the MOS transistor Q21 in the control circuit is turned on and the position light circuit is turned on, forming a position light path. The total resistance of the position light circuit decreases, the current of the entire light increases, and the brightness of the side rear position light is improved.

[0015] Further, S2 specifically refers to the following: When the internal detection chip detects that the rear door is in a closed state, MOSFET Q13 in the control circuit is turned on. Q13 is connected in series with R86 protection resistor to ground. After Q13 is turned on, the drain is at a low level. The gates of MOSFET Q12 and Q21 are connected in parallel and then in series with the drain of MOSFET Q13. At the same time, two sets of anti-interference branches are connected in parallel to form an anti-interference circuit to prevent the influence of electrostatic interference. At this time, the gates of MOSFET Q12 and Q21 are both at a low level, and the MOSFETs are not turned on. The current limiting resistors R75, R69, and R71 set in the position light circuit work. Under this condition, the brightness of the side rear position light and the rear door rear position light together achieve the position light indication effect.

[0016] Further, S3 specifically involves: when the internal detection chip detects that the back door is in the open state, controlling a low-level signal to turn off MOSFET Q13 in the control circuit, while MOSFETs Q12 and Q21 are turned off due to V... out When the voltage is normally supplied to the gates of MOSFETs Q12 and Q21, the high gate voltage turns on Q12 and Q21. In the position lamp circuit, resistors R74 and R76 are connected in parallel with current-limiting resistors R75, R69, and R71 to form a position lamp path. After being connected in parallel, the total resistance decreases, the current of the lamp increases, and the brightness of the position lamp on the side panel is improved.

[0017] The present invention has the following advantages:

[0018] This invention provides a control method for automatically increasing the brightness of rear position lights in passenger vehicles. When the trunk of a passenger vehicle is opened, the side rear position lights automatically increase their brightness. At this time, the illuminance of the individual side rear position lights is the same as the illuminance of the side rear position lights plus the tailgate rear position lights when the trunk is closed, ensuring consistent warning effects of the rear position lights under all road conditions and protecting pedestrian and vehicle safety. Furthermore, this control method is an internal control of the rear position lights, autonomously achieving the increased brightness effect after the tailgate is opened. This results in faster response time, eliminates the need for vehicle BCM control, is unaffected by the vehicle BCM status, reduces the number of control units in the vehicle BCM, lowers controller costs, and simultaneously reduces the burden on the controller, enhancing other aspects of its control performance. Attached Figure Description

[0019] The contents of this invention can be intuitively understood by referring to the accompanying drawings. The drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0020] Figure 1 This is a circuit diagram of the control circuit for the automatic brightening system of the rear position lights of a passenger vehicle according to an embodiment of the present invention;

[0021] Figure 2 This is a circuit diagram showing the coordination between the tailgate switch and the rear position light assembly of the automatic brightening system for rear position lights in a passenger vehicle according to an embodiment of the present invention.

[0022] Figure 3 This is a circuit diagram of the position light circuit of the automatic brightening system for rear position lights of a passenger vehicle according to an embodiment of the present invention;

[0023] Figure 4 This is a circuit diagram showing the interaction between the internal detection chip and the position light circuit of the automatic brightening system for rear position lights in a passenger vehicle according to an embodiment of the present invention. Detailed Implementation

[0024] To make the technical problems, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figures 1 to 4 As shown, a control system for automatic incremental rear position lights of a passenger vehicle comprises a rear position light assembly consisting of a control circuit with multiple O / I interfaces, a position light circuit, and an internal detection chip. The rear position light assembly is a collection of internal circuits for the side rear position light assembly.

[0027] The control circuit is connected to the tailgate switch and the position light circuit respectively; the tailgate switch is connected in parallel with the left and right rear position lights; the control circuit serves as the interface for the rear position light assembly, is connected in parallel with the tailgate, and is connected to the position light circuit through MOSFET Q21; pin 4 of the internal detection chip is connected to the collector of transistor Q9 in the position light circuit, and the emitter of Q9 is connected to the control circuit after being connected to R76 and R74 in parallel.

[0028] The control circuit includes a tailgate signal line, which is connected in parallel with the tailgate switch.

[0029] The control circuit includes MOSFETs Q13, Q12, and Q21. MOSFET Q13 is connected to ground after being connected in series with a protection resistor R86. The gates of MOSFETs Q12 and Q21 are connected in parallel and then connected in series with the drain of MOSFET Q13. Two anti-interference branches are also connected in parallel to form an anti-interference circuit. MOSFET Q21 is connected to the position light circuit.

[0030] The first set of anti-interference branches consists of a 100k resistor R87, a capacitor C64, and a diode Z2 connected in parallel. The second set of anti-interference branches consists of a 100k resistor R127 and a capacitor C100 connected in parallel.

[0031] The position light circuit includes current-limiting resistors R75, R69, and R71, as well as two parallel connecting resistors R76 and R74. The current-limiting resistors R75, R69, and R71 are connected in parallel and then in series with the parallel connecting resistors R76 and R74. The parallel connecting resistors R76 and R74 are then connected to transistor Q9 in the position light circuit and MOSFET Q21 in the control circuit, respectively.

[0032] The internal detection chip is connected to the collector of transistor Q9 in the position lamp circuit, and is connected to the gate of MOS transistor Q21 in the control circuit through the emitter of Q9 in series with current-limiting resistors R74 and R76 in parallel.

[0033] Example 2

[0034] A control method for an automatic incremental control system for rear position lights in a passenger vehicle includes:

[0035] S1. The internal detection chip detects whether the tailgate is open;

[0036] S2. When the internal detection chip detects that the rear door is closed, MOSFET Q13 in the control circuit is turned on. Q13 is connected in series with R86 protection resistor to ground. After Q13 is turned on, its drain is at a low level. The gates of MOSFETs Q12 and Q21 are connected in parallel and then in series with the drain of MOSFET Q13. At the same time, two sets of anti-interference branches are connected in parallel to form an anti-interference circuit to prevent the influence of electrostatic interference. At this time, the gates of MOSFETs Q12 and Q21 are both at a low level, and the MOSFETs are not turned on. The current limiting resistors R75, R69, and R71 in the position light circuit are working. Under this condition, the brightness of the side rear position light and the rear door rear position light together provide the position light indication effect.

[0037] S3. When the internal detection chip detects that the back door is open, it controls a low-level signal to turn off MOSFET Q13 in the control circuit. MOSFETs Q12 and Q21 are then switched off due to V... out The voltage is normally supplied to the gates of MOSFETs Q12 and Q21. The high gate voltage turns on Q12 and Q21. In the position lamp circuit, resistors R74 and R76 are connected in parallel with current-limiting resistors R75, R69, and R71 to form a position lamp path. After being connected in parallel, the total resistance decreases, the current of the lamp increases, and the brightness of the rear position lamp on the side is improved.

[0038] The above description is a preferred embodiment of the invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the invention, and these improvements and modifications should also be considered within the scope of protection of the invention.

Claims

1. A control system for automatic incrementing of rear position lights in a passenger vehicle, characterized in that, The rear position light assembly comprises a control circuit with multiple O / I interfaces, a position light circuit, and an internal detection chip. The rear position light assembly is a collection of internal circuits for the side rear position light assembly. The control circuit is connected to the tailgate switch and the position light circuit. The tailgate switch is connected in parallel with the left and right rear position lights. The control circuit serves as the interface for the rear position light assembly, connected in parallel with the tailgate and connected to the position light circuit via MOSFET Q21. The internal detection chip is connected to the position light circuit. The control circuit includes a tailgate signal line, which is connected in parallel with the tailgate switch. The control circuit includes MOSFETs Q13, Q12, and Q21, with MOSFET Q13 connected in series with a protection resistor R86 and then grounded. The gates of MOSFET Q12 and Q21 are connected in parallel and then in series with the drain of MOSFET Q13. Two anti-interference branches are also connected in parallel to form an anti-interference circuit. MOSFET Q21 is connected to the position lamp circuit. The position lamp circuit is equipped with current-limiting resistors R75, R69, and R71, as well as two parallel connecting resistors R76 and R74. The current-limiting resistors R75, R69, and R71 are connected in parallel and then in series with the parallel connecting resistors R76 and R74. The connecting resistors R76 and R74 are connected in parallel and then connected to the gates of transistor Q9 in the position lamp circuit and MOSFET Q21 in the control circuit, respectively. The control method of the control system includes: S1. The internal detection chip detects whether the tailgate is open; S2. When the internal detection chip detects that the tailgate is closed, the MOS transistor Q21 in the control circuit and the position light circuit are not connected. Under this condition, the brightness of the side rear position light and the tailgate rear position light together provide the position light indication effect. S3. When the internal detection chip detects that the rear door is open, the MOS transistor Q21 in the control circuit is turned on and the position light circuit is turned on, forming a position light path. The total resistance of the position light circuit decreases, the current of the entire light increases, and the brightness of the side rear position light is improved.

2. The control system for automatic incremental adjustment of rear position lights in a passenger vehicle as described in claim 1, characterized in that, Of the two sets of anti-interference branches, the first set of anti-interference branches consists of a 100k resistor R87, a capacitor C64, and a diode Z2 connected in parallel, while the second set of anti-interference branches consists of a 100k resistor R127 and a capacitor C100 connected in parallel.

3. The control system for automatic incremental adjustment of rear position lights in a passenger vehicle as described in claim 1, characterized in that, The internal detection chip is connected to the collector of transistor Q9 in the position lamp circuit, and is connected to the emitter of Q9 and the connecting resistors R74 and R76, and then connected to the gate of MOS transistor Q21 in the control circuit.

4. The control system for automatic incremental adjustment of rear position lights in a passenger vehicle as described in claim 1, characterized in that, Specifically, S2 is as follows: When the internal detection chip detects that the rear door is closed, MOSFET Q13 in the control circuit is turned on. Q13 is connected in series with R86 protection resistor to ground. After Q13 is turned on, the drain is at a low level. The gates of MOSFET Q12 and Q21 are connected in parallel and then in series with the drain of MOSFET Q13. At the same time, two sets of anti-interference branches are connected in parallel to form an anti-interference circuit to prevent the influence of electrostatic interference. At this time, the gates of MOSFET Q12 and Q21 are both at a low level, and the MOSFETs are not turned on. The current limiting resistors R75, R59, and R71 set in the position light circuit work. Under this condition, the brightness of the side rear position light and the rear door rear position light together provide the position light indication effect.

5. The control system for automatic incremental adjustment of rear position lights in a passenger vehicle as described in claim 1, characterized in that, Specifically, S3 involves the following: when the internal detection chip detects that the back door is open, a low-level signal is controlled to turn off MOSFET Q13 in the control circuit, while MOSFETs Q12 and Q21 are turned off due to V. out When the voltage is normally supplied to the gates of MOSFETs Q12 and Q21, the high gate voltage turns on Q12 and Q21. In the position lamp circuit, resistors R74 and R76 are connected in parallel with current-limiting resistors R75, R59, and R71 to form a position lamp path. After being connected in parallel, the total resistance decreases, the current of the lamp increases, and the brightness of the side rear position lamp is improved.

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