Indoor lamp control system

Abstract

To make it possible to reduce consumption power of a battery by lighting of an indoor lamp when a door is opened and closed multiple times in a short time and if possibility that the door is opened and closed is high for reasons other than purpose of riding.SOLUTION: An indoor lamp control system comprises an indoor lamp which illuminates indoor of a vehicle and a control part which performs control of lighting and lights-out of the indoor lamp on the basis of opening and closing of a door of a vehicle. The control part lights the indoor lamp when the door is opened and turns off the indoor lamp after a first time period elapses when the door is closed. In such a state that the ignition of the vehicle is stopped, there is provided the indoor lamp control system which turns off the indoor lamp after there elapses a second time period which is shorter than the first time period, when the door is closed, if the door is opened before the specified time elapses after the last door is closed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an interior light control system for a vehicle. [Background technology]

[0002] Conventionally, a technology for reducing the consumption of power from an in-vehicle battery is known that shortens the time it takes to automatically turn off interior lights when opening or closing a door after switching the ignition from ON to OFF (see Patent Document 1 below).

[0003] According to the technology of Patent Document 1, the first time the door is opened and closed after the ignition is turned off, the time until the interior light is turned off after the door is closed is shortened, and the second time the door is opened and closed after the ignition is turned off, the time until the interior light is turned off after the door is closed is not shortened.

[0004] By performing this control, when the door is opened and closed when it is predicted that the driver will exit the vehicle after the ignition is turned off, the duration for which the interior light is turned on after the door is closed is shortened, thereby reducing the power consumption of the vehicle battery. Furthermore, when the door is opened and closed at a timing other than after the ignition is turned off, i.e., when it is predicted that the driver will enter the vehicle, the duration for which the interior light is turned on after the door is closed is not shortened, thereby ensuring supplemental lighting for the driver when entering the vehicle. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-090984 Summary of the Invention [Problem to be solved by the invention]

[0006] As described above, in the conventional technology, the first door opening and closing after the ignition is turned off is predicted to be the door opening and closing when the driver exits the vehicle, so the interior light's on time is shortened. The second door opening and closing after the ignition is turned off is predicted to be the door opening and closing when the driver enters the vehicle, so the interior light's on time is not shortened. This type of control achieves both reduced battery power consumption and ensures visibility inside the vehicle when preparing to drive.

[0007] However, after turning off the ignition, there may be cases where the doors are opened and closed multiple times in a short period of time for purposes other than riding, such as when working near the vehicle or going camping. Conventional technology has not been able to reduce battery power consumption in such cases.

[0008] The present invention has been proposed to address such circumstances, and aims to reduce battery power consumption caused by turning on the interior lights when there is a high possibility that the doors are being opened and closed for reasons other than boarding, such as when the doors are opened and closed multiple times in a short period of time. [Means for solving the problem]

[0009] In order to solve such problems, the interior light control system of the present invention comprises an interior light that illuminates the interior of a vehicle, and a control unit that controls the turning on and off of the interior light based on the opening and closing of the vehicle door, wherein the control unit turns on the interior light when the door is opened, turns off the interior light after a first time has elapsed when the door is closed, and when the vehicle ignition is stopped, if the door is opened before a predetermined time has elapsed since the last time the door was closed, turns off the interior light after a second time shorter than the first time has elapsed when the door is closed. [Effects of the Invention]

[0010] An interior light control system with these characteristics makes it possible to reduce battery power consumption caused by turning on the interior lights when there is a high possibility that the doors are being opened and closed for reasons other than boarding, such as when the doors are opened and closed multiple times in a short period of time. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram showing the configuration of an interior light control system according to an embodiment of the present invention; [Figure 2] FIG. 3 is a diagram showing a control flow of a lighting ECU in the interior light control system according to the embodiment of the present invention. [Figure 3] FIG. 10 is a diagram showing a control flow of a lighting ECU in a modified example of the interior light control system according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the same reference numerals denote parts having the same functions, and duplicated descriptions in the drawings will be omitted as appropriate.

[0013] The interior light control system 1 in this embodiment is configured by a plurality of control target devices mounted on a vehicle 2 and ECUs (Electronic Control Units) that are control units for these control target devices. The control target devices and the ECUs are connected to each other so as to be able to communicate with each other via an in-vehicle network 4 such as a CAN (Controller Area Network) or a LIN (Local Interconnect Network) and a central gateway (CGW) 3 that serves as a relay device.

[0014] In the interior light control system 1, information indicating the operating state of the controlled device is output from each ECU to the in-vehicle network 4. Furthermore, each ECU controls the operation of the controlled device based on information from other ECUs acquired from the in-vehicle network 4.

[0015] Each ECU includes a processor, such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), which executes various processes. Each ECU also includes volatile storage elements, such as RAM (Random Access Memory) that temporarily processes data used by the processor, and non-volatile storage elements, such as ROM (Read Only Memory) that stores programs executed by the processor. Note that some or all of the operations executed by each ECU can also be implemented by hardware, such as an ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or GPU (Graphics Processing Unit).

[0016] Each ECU and each controlled device that constitutes an interior light control system 1 according to this embodiment will be described with reference to FIG.

[0017] 1 illustrates only the lighting ECU 10, the door ECU 20, the IGECU 30, and the battery ECU 40 among the multiple ECUs, and omits the illustration of the other ECUs. Also, among the multiple control target devices, only the interior light 11, the door 21, the ignition (IG) 31, and the battery 41 are illustrated, and the illustration of the other control target devices, sensors, etc. is omitted. In this embodiment, detailed explanations and illustrations of ECUs and control target devices that are not involved in the function and operation of the interior light control system 1 are omitted even if they are included in the interior light control system 1.

[0018] 1, the lighting ECU 10 includes a CPU 101, a ROM 102, a RAM 103, an I / F 104, and a timer 105, and controls the interior light 11 and the like by executing various processes based on programs stored in the ROM 102 by the CPU 101. The ROM 102, which is provided as a non-volatile storage element, stores information about other ECUs acquired from the in-vehicle network 4, programs for controlling the interior light 11 and the like based on input from an interior light selector switch 12 (described later), and various data required to execute the programs.

[0019] The RAM 103, which is provided as a volatile storage element, is used as a work area when the CPU 101 executes various processes. Therefore, various pieces of information output from the ECUs and the like are temporarily stored in the RAM 103 as needed.

[0020] The I / F 104 controls the input and output of various information and control signals used in the lighting ECU 10. That is, it accepts input of information output from each ECU to the in-vehicle network 4 and information output from the interior light selector switch 12 (described later) and the like. The I / F 104 also outputs control signals generated in the CPU 101 to an output destination according to the control content.

[0021] The CPU 101 controls the interior light 11 in the interior light control system 1 by loading the program stored in the ROM 102 into a memory such as the RAM 103 and executing the program.

[0022] The timer 105 provided in the lighting ECU 10 is used to measure the lighting time of the interior light 11, the time from closing to opening of the door 21, etc. A specific description will be given later.

[0023] The interior light 11 is a lighting device provided in the interior of the vehicle 2 to illuminate the interior of the vehicle. The interior light 11 is controlled to be turned on and off by the lighting ECU 10. Specific control of the interior light 11 in the interior light control system 1 will be described later with reference to FIG. 2.

[0024] The interior light selector switch 12 is a switch that switches the lighting mode of the interior light 11. The interior light selector switch 12 can be switched between three states, "AUTO (DOOR)", "ON", and "OFF", by the user, and outputs a signal to the lighting ECU 10 based on the switching state of the switch. The lighting ECU 10 controls the lighting mode of the interior light 11 based on the signal input from the interior light selector switch 12.

[0025] When the interior light selector switch 12 is in the "AUTO (DOOR)" position, the interior light 11 turns on and off in conjunction with the opening and closing of the door 21. Specifically, the interior light 11 turns on when the door 21 is opened, and turns off after a first or second time has elapsed after the door 21 is closed. The first and second times will be described later with reference to FIG. 2.

[0026] When the interior light selector switch 12 is in the "ON" state, the interior light 11 is turned on. When the interior light selector switch 12 is in the "ON" state, unlike the "AUTO (DOOR)" state, the interior light 11 continues to be turned on regardless of whether the door 21 is open or closed.

[0027] When the interior light selector switch 12 is in the "OFF" state, the interior light 11 is turned off. When the interior light selector switch 12 is in the "OFF" state, unlike the "AUTO (DOOR)" state, the interior light 11 remains turned off regardless of whether the door 21 is open or closed.

[0028] The door ECU 20 controls each of the multiple doors 21 provided in the vehicle 2. Specifically, the doors 21 are provided with a door lock mechanism (not shown) for locking and unlocking the doors 21 and actuators (not shown) required for opening and closing the doors 21, and the door ECU 20 controls these to open, close, unlock, and lock the doors 21.

[0029] The door 21 is provided with a door opening / closing switch 211 that detects whether the door 21 is open or closed. The door opening / closing switch 211 is provided for each of the multiple doors 21 provided in the vehicle 2. The door ECU 20 detects whether the door 21 is open or closed by a signal input from the door opening / closing switch 211, and outputs information related to the opening or closing of the door 21 to the in-vehicle network 4. When the interior light selector switch 12 is in the "AUTO (DOOR)" state, the lighting ECU 10 controls the turning on and off of the interior light 11 based on the information related to the door opening or closing input from the door ECU 20 via the in-vehicle network 4.

[0030] Furthermore, the lighting ECU 10 operates a timer 105 based on information relating to the door opening and closing input from the door ECU 20 via the in-vehicle network 4, and measures the lighting time of the interior light 11, the time from closing to opening of the door 21, etc. Furthermore, the lighting ECU 10 controls the interior light 11 based on the measurement information of the timer 105. Specific control contents will be described later.

[0031] The IGECU 30 controls the ignition 31. The ignition 31 is a starting device for the vehicle 2, and when the ignition 31 is ON, the drive system (not shown), CID (not shown), air conditioning system (not shown), etc. of the vehicle 2 are activated. The IGECU 30 controls the ON / OFF switching of the ignition 31 according to the input of an IG switch 32, which will be described later.

[0032] The IG switch 32 is a switch that transmits a signal to the IGECU 30 instructing it to switch the ignition 31 ON and OFF. A user of the vehicle 2 operates the IG switch 32 to switch the ignition 31 ON and OFF. When driving the vehicle 2, the user operates the IG switch 32 to turn the ignition 31 ON and start the drive system (not shown). On the other hand, when ending driving of the vehicle 2, the user operates the IG switch 32 to turn the ignition 31 OFF and stop the drive system (not shown).

[0033] The IGECU 30 outputs information about the ON / OFF switching of the ignition 31 to the in-vehicle network 4. The lighting ECU 10 controls the turning on and off of the interior light 11 based on the information about the ON / OFF switching of the ignition 31 input from the IGECU 30 via the in-vehicle network 4. The specific control content will be described later.

[0034] The battery 41 is controlled by the battery ECU 40. The in-vehicle electronic devices installed in the vehicle 2, such as the interior light 11 and an air conditioner (not shown), consume power supplied from the battery 41 to operate.

[0035] Next, a control flow of the lighting ECU 10 in the interior light control system 1 according to this embodiment will be described with reference to Fig. 2. The control shown in Fig. 2 is executed only when the interior light selector switch 12 is in the "AUTO (DOOR)" state.

[0036] When the ignition 31 is OFF (step A01—YES), the lighting ECU 10 monitors whether the door 21 is opened (step A02). The lighting ECU 10 acquires information about the door 21 and the ignition 31 from the door ECU 20 and the IGECU 30 via the in-vehicle network 4, and when the lighting ECU 10 detects that the door 21 is opened (step A02—YES) while the ignition 31 is OFF (step A01—YES), it turns on the interior light 11 (step A03). When the ignition 31 is ON (step A01—NO), the process proceeds to step A15.

[0037] Next, the lighting ECU 10 determines whether the door 21 has been opened for the first time since the ignition 31 was turned off (step A04). If it is determined that the door 21 has been opened for the first time since the ignition 31 was turned off (step A04—YES), the process proceeds to step A05. If it is determined that the door 21 has been opened for the second or subsequent time since the ignition 31 was turned off (step A04—NO), the process proceeds to step A09.

[0038] If it is determined that the door 21 has been opened for the first time since the ignition 31 was turned off (step A04—YES), the door opening information of the door 21 is stored (step A05). The door opening information of the door 21 is part of the information about the opening and closing of the door 21 that the door ECU 20 has output to the in-vehicle network 4, and can be stored by acquiring the information about the opening and closing of the door 21. The determination in step A04 is made based on whether the door opening information of the door 21 has been stored. That is, after the lighting ECU 10 stores the door opening information of the door 21 in the processing of step A05, the lighting ECU 10 determines in step A04, which is executed when the door 21 is subsequently opened, that the door 21 has been opened for the second time or later since the ignition 31 was turned off (step A04—NO).

[0039] After storing the door 21 open information, the lighting ECU 10 monitors whether the door 21 is closed (step A06). When the lighting ECU 10 detects that the door 21 is closed from the door ECU 20 via the in-vehicle network 4 (step A06-YES), the lighting ECU 10 activates the timer 105 (step A07).

[0040] Furthermore, when detecting that the door 21 is closed (step A06—YES), the lighting ECU 10 turns off the interior light 11 after the second time has elapsed since detecting that the door 21 is closed (step A08), and ends the series of processes. Steps A07 and A08 are performed substantially simultaneously. The second time here may be an extremely short time, such as 1 to 2 seconds, or 0 seconds. If the second time is 0 seconds, the interior light 11 is turned off immediately after the door 21 is closed. It is predicted that the first opening and closing of the door 21 after the ignition 31 is turned off will be when the occupant gets out of the vehicle. In other words, since it is highly likely that the interior light 11 does not need to be turned on in preparation for driving when getting in, the lighting ECU 10 shortens the lighting time of the interior light 11 after the door 21 is closed when the door 21 is first opened and closed after the ignition 31 is turned off, thereby reducing the power consumption of the battery 41.

[0041] If it is determined in step A04 that the door 21 has been opened for the second or subsequent time since the ignition 31 was turned off (step A04—NO), it is determined whether the timer 105 has counted a predetermined time (step A09). The timer 105 operates the first time the door 21 is opened or closed after the ignition 31 is turned off (step A07). Therefore, if it is determined in step A04 that the door 21 has been opened for the second or subsequent time since the ignition 31 was turned off (step A04—NO), the timer 105 continues counting. The predetermined time for the timer 105 is, for example, 10 minutes. If it is determined that the timer 105 has not counted a predetermined time (step A09—NO), the process proceeds to step A10. If it is determined that the timer 105 has counted a predetermined time (step A09—YES), the process proceeds to step A13.

[0042] If the lighting ECU 10 determines that the timer 105 has not elapsed the predetermined time when the door 21 is opened (step A09—NO), it monitors whether the door 21 is closed (step A10). If the lighting ECU 10 detects that the door 21 is closed from the door ECU 20 via the in-vehicle network 4 (step A10—YES), it resets the measurement of the timer 105 (step A11). Also, if the lighting ECU 10 detects that the door 21 is closed (step A10—YES), the lighting ECU 10 turns off the interior light 11 after a second time has elapsed after detecting that the door 21 is closed (step A12), and ends the series of processes. Steps A11 and A12 are performed substantially simultaneously.

[0043] If the door 21 is opened within a predetermined time (e.g., 10 minutes) after the previous closing of the door 21, it is predicted that the opening was done for a reason other than boarding, such as camping or other work being done around the vehicle. In other words, since it is highly likely that the interior light 11 does not need to be turned on in preparation for driving when boarding, the lighting time of the interior light 11 after the door 21 is closed is shortened to reduce power consumption of the battery 41. Furthermore, by resetting the measurement of the timer 105 when the door 21 is closed (step A11), the lighting time of the interior light 11 after the door 21 is closed can be shortened even in the case of repeated opening and closing of the door 21 in a short period of time that is highly likely to have been done for a reason other than boarding, thereby reducing power consumption of the battery 41.

[0044] On the other hand, if the lighting ECU 10 determines that the timer 105 has elapsed the predetermined time when the door 21 is opened (step A09—YES), it monitors whether the door 21 is closed (step A13). When the lighting ECU 10 detects that the door 21 is closed from the door ECU 20 via the in-vehicle network 4 (step A13—YES), the lighting ECU 10 turns off the interior light 11 after a first time has elapsed after the door 21 is closed (step A14), and ends the series of processes. The first time here is a time longer than the second time, and is the time originally set in the vehicle 2 for turning off the interior light 11 after the door 21 is closed, such as 15 seconds or 30 seconds.

[0045] When the door 21 is opened after a predetermined time (for example, 10 minutes) has elapsed since the previous closing of the door 21, it is predicted that the purpose is to get in the vehicle. In other words, since it is highly likely that the interior light 11 needs to be turned on in preparation for driving when getting in, the lighting time of the interior light 11 after the door 21 is closed is not shortened, thereby ensuring the driver's visibility in the vehicle interior.

[0046] Furthermore, when the door 21 is opened after the timer 105 has elapsed a predetermined time (step A09-YES), the timer 105 is not reset after the door 21 is closed (step A13-YES). In other words, if the opening of the door 21 is not detected within a predetermined time (e.g., 10 minutes) after the door 21 has been closed, the illumination time of the interior light 11 after the door 21 is closed is not shortened when the door 21 is subsequently opened or closed. This makes it possible to prevent a loss of visibility for preparing to drive, for example, when the door 21 is opened or closed to load luggage or the like into the vehicle 2, and then the door 21 is opened or closed again within a predetermined time period to get in.

[0047] If it is determined in step A01 that the ignition 31 is ON (step A01—NO), the lighting ECU 10 erases the stored door opening information of the door 21 and the information about the time measured by the operating timer 105 (step A15). If the door opening information of the door 21 and the information about the time measured by the operating timer 105 are not stored, the processing of step A15 does not need to be executed. If the lighting ECU 10 detects that the door 21 is open while the ignition 31 is ON (step A16—YES), it turns on the interior light 11 (step A17). Thereafter, if it detects that the door 21 is closed (step A18—YES), it turns off the interior light 11 after a first time has elapsed since detecting that the door 21 is closed (step A19), and the series of processing ends.

[0048] When the lighting ECU 10 detects that the ignition 31 is turned on, it erases the door 21 opening information and the information about the time measured by the operating timer 105. Therefore, when the door 21 is opened for the first time after the ignition 31 is turned off, the door 21 opening information is not stored, so the determination in step A04 is YES and the process proceeds to step A05. As a result, when the door 21 is opened for the first time after the ignition 31 is turned off, it is possible to turn off the interior light 11 after the second time has elapsed after the door 21 is closed, thereby reducing the power consumption of the battery 41.

[0049] By executing the control described above, when there is a high possibility that the door 21 has been opened and closed for reasons other than boarding, such as when the door 21 has been opened and closed multiple times within a specified period of time, the lighting time of the interior light 11 after the door 21 is closed can be shortened, thereby reducing the consumption of power from the battery 41 due to unnecessary lighting of the interior light 11.

[0050] In the embodiment, the predetermined time of the timer 105 is set to 10 minutes, but the predetermined time may be a time other than 10 minutes, for example, it may be a shorter time such as 5 minutes, or it may be a time such as 20 minutes which is not excessively long.

[0051] Next, an interior light control system 1A will be described, which is a modified example of the interior light control system 1 in this embodiment. Explanations of the modified interior light control system 1A that overlap with the interior light control system 1 will be omitted. The configuration of the interior light control system 1A is the same as that of the interior light control system 1 shown in FIG. 1, and therefore explanations of each ECU and each controlled device will be omitted.

[0052] Next, a control flow of the lighting ECU 10 in the interior light control system 1A according to this embodiment will be described with reference to Fig. 3. The control shown in Fig. 3 is executed only when the interior light selector switch 12 is set to "AUTO (DOOR)" as in the interior light control system 1.

[0053] The processing of steps B01 to B12 shown in FIG. 3 is similar to the processing of steps A01 to A12 shown in FIG. 2, and the processing of steps B18 to B22 shown in FIG. 3 is similar to the processing of steps A15 to A19 shown in FIG. 2, so description thereof will be omitted.

[0054] In step B09, if the lighting ECU 10 determines that the timer 105 has elapsed a predetermined time when the door 21 is opened (step B09—YES), the interior light control system 1A determines whether the opened door 21 is the door corresponding to the driver's seat (step B13). When the door ECU 20 receives a signal from the door opening / closing switch 211 and detects the opening of the door 21, it outputs information about the opening or closing of the door 21, including information about which seat in the vehicle 2 the opened door 21 corresponds to, to the in-vehicle network 4. Based on the information acquired from the door ECU 20 via the in-vehicle network 4, the lighting ECU 10 determines whether the opened door 21 is the door corresponding to the driver's seat. If the lighting ECU 10 determines that the opened door 21 is the door corresponding to the driver's seat (step B13—YES), the process proceeds to step B14. If the lighting ECU 10 determines that the opened door 21 is not the door corresponding to the driver's seat (step B13—NO), the process proceeds to step B16.

[0055] In step B13, if the lighting ECU 10 determines that the opened door 21 is the door corresponding to the driver's seat (step B13-YES), it monitors whether the door 21 is closed (step B14). Then, when the lighting ECU 10 detects that the door 21 is closed (step B14-YES), it turns off the interior light 11 after a first time has elapsed since the door 21 was closed (step B15), and ends the series of processes.

[0056] On the other hand, in step B13, if the lighting ECU 10 determines that the opened door 21 is not the door corresponding to the driver's seat (step B13—NO), it monitors whether the door 21 is closed (step B16). Then, when the lighting ECU 10 detects that the door 21 is closed (step B16—YES), it turns off the interior light 11 after a second time has elapsed since the door 21 was closed (step B17), and ends the series of processes.

[0057] As described above, in the interior light control system 1A, even if a door 21 is opened after a predetermined time has elapsed since the previous closing of the door 21, if the opened door 21 is not the door corresponding to the driver's seat, the lighting time of the interior light 11 after the closing of the door 21 is shortened. By performing such control, even if a predetermined time has elapsed, in cases where lighting of the interior light 11 is not necessary for preparation for driving when getting in the vehicle, the lighting time of the interior light 11 after the closing of the door 21 can be shortened, thereby reducing the power consumption of the battery 41.

[0058] Furthermore, even when it is determined in step B13 that the opened door 21 is not the door corresponding to the driver's seat (step B13-NO) and the interior light 11 is turned off after the second time has elapsed after the door 21 is closed (step B17), the interior light control system 1A does not reset the timer 105. This prevents the illumination time of the interior light 11 from being shortened, which would impair the driver's visibility, for example, when getting into the vehicle 2 and opening a door other than the door corresponding to the driver's seat (for example, a door corresponding to a rear seat, etc.), loading luggage into the vehicle 2, and then opening and closing the door 21 corresponding to the driver's seat to get into the vehicle and prepare for driving.

[0059] In the present embodiment, the lighting ECU 10 acquires information from other ECUs via the in-vehicle network 4 and executes control in the interior light control system. However, for example, the door open / close switch 211, the IG switch 32, the battery 41, etc. may be connected to the lighting ECU 10 by harnesses, and the lighting ECU 10 may directly acquire signals relating to the operation of each switch, etc., and execute control of the interior light control system.

[0060] The embodiments of the present invention have been described above in detail with reference to the drawings, but the specific configuration is not limited to the described embodiments, and the present invention also includes design changes and the like within the scope of the gist of the present invention. [Explanation of symbols]

[0061] 1,1A: Interior light control system, 2: Vehicle, 3: Central gateway, 4: In-vehicle network, 10: Lighting ECU, 11: Interior light, 12: Interior light selector switch, 20: Door ECU, 21: Door, 30: IGECU, 31: Ignition, 32: IG switch, 40: Battery ECU, 41: Battery, 101: CPU, 102: ROM, 103: RAM, 104: I / F, 105: Timer, 211: Door open / close switch

Claims

1. Interior lights that illuminate the interior of the vehicle; a control unit that controls turning on and off the interior light based on opening and closing of a door of the vehicle, The control unit When the door is opened, the interior light is turned on. when the door is closed, turning off the interior light after a first time period has elapsed; When the ignition of the vehicle is turned off, In the case where the door is opened before a predetermined time has elapsed since the door was previously closed, the interior light control system turns off the interior light after a second time shorter than the first time has elapsed when the door is closed.

2. The control unit 2. The interior light control system according to claim 1, wherein when the door is closed during the first opening and closing of the door after the ignition of the vehicle is turned off, the interior light is turned off after the second time period has elapsed.

3. The control unit When the door is opened after the predetermined time has elapsed since the door was last closed, determining whether the opened door corresponds to the driver's seat of the vehicle; 3. The interior light control system according to claim 1, wherein when it is determined that the door does not correspond to the driver's seat, the interior light is turned off after the second time period has elapsed when the door is closed.

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