JPS6264647A - Car room lamp modulating device - Google Patents

Abstract

PURPOSE:To prevent to leave lighting and the like, by furnishing a signal generating device to generate a condition signal responding to the car condition, and a control circuit to modulate a room lamp when the door is opened responding to the condition signal. CONSTITUTION:A white lamp 11 and a red lamp 12 are installed in the package of a room lamp 10. When the room door is opened, the white lamp 11 is lighted by the function of door switches 14-17 in an ordinary car condition. When passengers leave from the car, if some abnormal condition such as the parking brake is not locked when the driver leaves from the driver seat finally, for example, a signal from a forgetting detection switch 18 is given to a control circuit 13, lighting the red lamp 12 to give a warning to the passengers.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention provides an interior light lighting circuit that includes an interior light that is turned on in conjunction with the opening of a vehicle cabin door, and modulates this interior light according to the vehicle condition. Regarding equipment.

(Prior Art) An interior light lighting circuit is generally known that applies electrical energy to a vehicle interior light to turn on the vehicle interior light in response to a switch responsive to opening of a vehicle passenger door. In the known type, a single interior light is provided at an appropriate position on the ceiling of the vehicle, and is usually lit with white light. In addition to turning on the light automatically when the door is opened, the light can also be turned off regardless of whether the door is opened or turned on regardless of whether the door is closed by operating a manual switch.

When in automatic mode, the illumination of the interior light can serve, for example, as a door ajar warning.

(Problems to be Solved by the Invention) When leaving a vehicle, occupants generally need to be careful not to forget to remove the key, set the parking brake, and lock the doors. However, conventional interior lights have nothing to do with these precautions.The present invention focuses on the fact that the cabin door is inevitably opened when the passenger leaves the vehicle, and the present invention has been developed based on the fact that the cabin door is inevitably opened when the passenger leaves the vehicle. It is an object of the present invention to provide a device that can be used to prevent forgetting to turn on the light as described above.

(Means for Solving the Problems) In order to solve the above problems, the present invention employs the following technical means for application to the indoor light lighting circuit described in Section W. That is, a signal generating means for generating a status signal in response to at least one condition of the vehicle; and a control means for modulating and operating the vehicle interior light when a cabin door is opened in response to the status signal from the signal generating means. The structural feature is that it has the following.

In realizing such a configuration, according to one embodiment of the present invention, a vehicle interior light whose emitted light color can be changed by a control signal from a modulation control means can be adopted. Although the change in emitted light color can be achieved by using a movable color filter, it can also be achieved by selectively emitting light from a plurality of lamps whose emitted light colors differ by coloring or the like.

The signal generating means is configured to generate a status signal for modulation in response to at least one of the considerations for the occupant leaving the vehicle. For example, modulation can occur when two or more cabin doors are open. Further, modulation can be performed when you forget to pull out the key switch, forget to lock the door, forget to operate the parking brake, etc.

The control means may be specifically adapted to be responsive to the opening of the driver's door, and may be specified such that the modulation is carried out only upon the opening of the driver's door.

Further, the control means can be designed to allow the combined use of the conventionally known manual lighting mode and manual lighting off mode. When providing a manual lighting mode, it is desirable to be able to allow lighting without modulation.

Further, the control means may be freely combined with a known delay means that turns on the interior light for a while after the interior light is turned on by opening the guest room door and the guest room door is closed.

(Operation and Effect) According to the described technical means, the vehicle interior light is turned on when the passenger compartment door is opened. At this time, the state indicating the vehicle condition from the signal generating means! When the 3 signal is generated, the vehicle interior light is modulated and operated by the control means responsive thereto.

When a passenger opens the passenger compartment door to leave the vehicle, the vehicle interior light is turned on without being modulated under normal vehicle conditions, but if a status signal is generated in a specific vehicle condition, The vehicle interior lights are modulated and turned on.

Therefore, when the occupant leaves the vehicle, he or she is alerted to the state of the vehicle due to the lighting state of the interior light that is different from the normal state. When the cabin door is closed, the interior lights are turned off, so there is no unnecessary alerting.

(Example) FIG. 1 shows an example of the present invention. The vehicle interior light 10 is attached to an appropriate location on the ceiling of a vehicle passenger compartment, and illuminates the interior of the passenger compartment when turned on. It is assumed that the package of the interior light 10 contains two white lamps 11 and two red lamps 120, and both lamps have approximately the same luminance.

A control circuit 13 is provided, and various inputs necessary for lighting and modulation control of the interior light are provided to the control 13, and the interior light is turned on, illuminated, and modulated by the control output of the control circuit 13. It is.

The door switches 14 to 17 are generally referred to as courtesy switches, and have contacts that open when each door of a four-door vehicle is closed and close when it is open.

The forget detection switch 18 is, for example, a parking brake switch, and has a contact that closes when the parking brake is not applied. The forgotten detection switch 18 may be a switch provided to detect forgetting to remove another key switch, or a plurality of forgotten detecting switches may be connected in parallel to generate a signal when any one of the forgotten keys is detected. It may also be a switch group configured to do so.

The manual switch 19 has contacts that are closed when manually turning on the interior light and opened when attempting to automatically control the interior light.

The switches 14-19 described above are each configured to be connected to a suitable current source, such as a pull-down or pull-up resistor, and to provide the control circuit 13 with an electrical signal generated when the contact is closed.

The control circuit 13 receives electrical signals from the switches 14 to 19 and makes logical decisions according to predetermined logical conditions. Therefore, the control circuit 13 can be configured as a logic circuit that performs logical judgments to be described later. Therefore, a microcomputer can also be used as the logic circuit.

The control output generated by the control circuit 13 based on its logical judgment means turning on/off the white lamp 11 of the indoor light 10 and turning on/off the red lamp 12. This control output is connected to a suitable driver 20.2 such as a relay switch.
1 to each lamp 11.12.

The control circuit 13 is configured using, for example, a microcomputer, and its operation is defined by a preset control program. FIG. 2 shows an example of such a control program, and the microcomputer is constantly supplied with power from an on-vehicle battery (not shown) and repeatedly processes this control program consisting of the program steps described below.

The control circuit 3 repeatedly monitors the electrical signals of the door switches 14 to 17 in step 22.

If all of the door switches 14 to 17 have their contacts open, that is, all cabin doors are closed, step 2
3, check whether the manual switch 19 is open or closed. Then, when the manual switch 19 is closed, that is, when the interior light is to be turned on manually, step 24 is executed. That is, a control output for lighting the white lamp 11 is given to the driver 20, and the white lamp 11 is turned on.

On the other hand, when the switch 19 is open, that is, when the indoor light lighting control is in automatic mode, step 25 is executed.

That is, both lamps 11 and 12 of the interior light 10 are turned off.

Thus, when the passenger compartment door is in the closed state, the white lamp 11 of the interior light 10 can be turned on/off by operating the manual switch 19.
It can be turned off.

Next, at least one of the door switches 14 to 17
If one of the contacts is closed, i.e. one of the cabin doors is open, step 26 is executed.

In step 26, it is checked if two or more of the door switches 14 to 17 have closed contacts.

When two or more passenger compartment doors are opened, there may be various conditions and combinations of doors, but as a typical example, two or more passenger compartment doors may be opened in order for both the driver and one or more other occupants to leave the vehicle. Doors may open. This step 27 is executed, a control output is given to the driver 21, and the red lamp 12 of the interior light 10 is turned on.

Thus, when several open cabin doors are closed in sequence and the last door is to be closed (e.g. when the driver exits or closes the driver's door for the last time), if that door If the other doors are also open, the red lamp 12 lights up, indicating that the vehicle is in an unusual state.

Next, if one of the cabin doors is open, the forget detection switch 28 is checked in step 28.

If the occupant forgets to use the parking brake, etc.
Based on the determination result in step 28, step 27 is executed to turn on the red lamp 12. This indicates that the vehicle condition is unusual.

When one of the passenger compartment doors is opened, if the vehicle is in normal condition, the white lamp 1 of the interior light 10 is lit.
Help get off the train.

[Brief explanation of drawings]

FIG. 1 is an electrical wiring diagram of an embodiment of the present invention, and FIG. 2 is a flowchart showing the operation of the control circuit shown in FIG. 10...Interior light, 11...White lamp, 12...
Red lamp, 13...Control circuit, 14-17...Door switch, 18...Forgetting detection switch, 19...
manual switch. Agent Patent Attorney Takashi Okabe Figure 1 Figure 2

Claims (1)

[Scope of Claims] A device applied to an interior light lighting circuit that applies electrical energy to a vehicle interior light to light the vehicle interior light in response to a switch responsive to opening of a vehicle passenger compartment door, the device comprising: a signal generating means for generating a status signal in response to at least one condition of the signal generating means; and a control means for modulating and operating the vehicle interior light when a cabin door is opened in response to the status signal from the signal generating means. A vehicle interior light modulation device equipped with .