JPH0687376A - Cabin lighting device for vhicle - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the door is forgotten to be closed or the vehicle is in the half-door state, the interior lighting will not be turned on automatically even if the outside of the vehicle becomes dark to prevent unnecessary consumption of battery power. [Structure] Brightness detection means 1 for detecting illuminance outside the vehicle, outputting a bright signal when the detected illuminance is larger than a preset value, and outputting a dark signal when the detected illuminance is equal to or less than the preset value.
~ 3 and open / close detection means 4, 5 for detecting the open / closed state of the door
And a storage means 6a for storing the output signals of the brightness detection means 1 to 3 when a change in the state of the door from closed to open is detected.
6b, and a control means 6c for illuminating the interior illumination lamp 8 by the drive means 7 when the dark signal is stored and the open state of the door is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle interior lighting device for illuminating a vehicle interior.

[0002]

[Prior Art and its Problems] When the vehicle door is opened,
There is known a vehicle interior lighting device in which the interior illumination lamp is turned on when the outside of the vehicle is dark and the illumination lamp is not turned on when the outside of the vehicle is bright (see, for example, Japanese Patent Laid-Open No. 61-119846). In this type of vehicle interior lighting device, the light sensor detects the illuminance outside the vehicle, the door switch detects the open / closed state of the door, and when the illuminance outside the vehicle is below a predetermined value and the door open state is detected, the interior The lighting is on.

However, in the conventional vehicle interior lighting device, the interior illumination lamp is automatically turned on when the outside of the vehicle becomes dark after leaving the vehicle without forgetting to close the door or noticing that the door becomes a half-door. There is a problem that the occupant remains lit until the occupant returns to the vehicle, which wastes battery power.

An object of the present invention is to prevent wasteful consumption of battery power by not automatically turning on the interior illumination lamp even if the door is forgotten to be closed or the outside of the vehicle is dark when the door is in the half-door state. It is in.

[0005]

The invention of claim 1 will be described with reference to FIG. 1 showing the configuration of the first embodiment. According to the invention of claim 1, the illuminance outside the vehicle is detected, and the detected illuminance is preset. A bright / dark detecting means 1 that outputs a bright signal when the value is larger than a set value and outputs a dark signal when the detected illuminance is less than or equal to the set value.
~ 3 and open / close detection means 4, 5 for detecting the open / closed state of the door
And storage means 6a, 6b for storing the output signals of the brightness detection means 1 to 3 when the opening / closing detection means 4, 5 detect a change in the state of the door from closed to open, and the storage means 6a,
6b, a dark signal is stored, and a control means 6c for turning on the indoor illumination lamp 8 by the driving means 7 when the open / close detection means 4, 5 detect the open state of the door is provided. To achieve. Further, when the inventions of claims 2 to 4 are described in association with FIG. 3 showing the configuration of the second embodiment, the invention of claim 2 detects, in addition to the invention of claim 1, the passenger's intention to board. Equipped with boarding intention detecting means 9 to 11, and the storage means 6a and 6b are boarding intention detecting means 9 to 11.
When the passenger's intention to board is detected, the stored contents are erased, and the output signals of the brightness detection means 1 to 3 at that time are stored again. The boarding intention detecting means of the vehicle interior lighting device according to claim 3 is the detection switches 9 and 10 for detecting the opening operation of the door handle provided outside the vehicle. The boarding intention detecting means of the vehicle interior lighting device according to a fourth aspect is a remote control switch 11 for remotely unlocking the door lock device from outside the vehicle.

[0006]

In the vehicle interior lighting device according to the first aspect of the present invention, the interior illumination lamp is turned on when the illuminance outside the vehicle when the door is opened is darker than a preset value and when the door is opened. As a result, when the door is opened, the outside of the vehicle is bright, and even if you forget to close the door or leave the vehicle without noticing that it has become a half-door, the interior lighting will automatically turn on when the outside of the vehicle becomes dark. Not done. In the vehicle interior lighting device according to claim 2, the exterior illuminance is detected again when the passenger's intention to board the vehicle is detected, and the interior illuminance at that time is darker than the set illuminance, and the interior is opened when the door is opened. Turn on the lighting. As a result, the indoor illumination lamp in the non-illuminated state can be automatically turned on by performing a normal operation for getting on the vehicle when the vehicle returns to the vehicle in the dark.

Incidentally, in the section of means and action for solving the above-mentioned problems for explaining the constitution of the present invention, the drawings of the embodiments are used in order to make the present invention easy to understand. It is not limited to.

[0008]

【Example】

—First Embodiment— FIG. 1 is a circuit diagram of the first embodiment. The optical sensor 1
For example, it is provided on the front differential grill of the vehicle and outputs an illuminance signal according to the illuminance outside the vehicle. The amplifier circuit 2 amplifies the illuminance signal output from the optical sensor 1 to a predetermined signal level. The comparator 3 compares the amplified illuminance signal with a preset value, and outputs a high level signal when the illuminance signal exceeds the set value. That is, when the outside of the vehicle is brighter than the set illuminance, the output of the comparator 3 becomes high level, and when the outside of the vehicle is below the set illuminance and dark, the comparator 3
Output goes low. The door switches 4 and 5 are switches that detect the open / closed state of the vehicle door. The switch 4 is turned on when the driver's seat door is opened, and the switch 5 is turned on when the passenger seat door is opened. When there are three or more vehicle doors, each door may be provided with an open / closed detection switch and connected in parallel.

The logic circuit 6 is composed of an inverter 6a, a T-flip-flop 6b and a NOR 6c.
The output of the comparator 3 is connected to the set terminal S of the T-flip-flop 6b, and the output of the comparator 3 is connected to the reset terminal R via the inverter 6a.
Further, door switches 4 and 5 are connected to the trigger terminal T. The inverter 6a and the T-flip-flop 6b have a function of storing the output state of the comparator 3 when the door switch 4 or 5 is turned on, and the output of the comparator 3 is high when the door switch 4 or 5 is turned on. If it is a level, the output Q of the T-flip-flop 6b becomes a high level, and the high level state is stored even if the door switch 4 or 5 is turned off. On the contrary, when the door switch 4 or 5 is turned on, the comparator 3
If the output of is low level, T-flip-flop 6
The output Q of b becomes low level, and the low level state is stored even if the door switch 4 or 5 is turned off.

The NOR 6c has a high level output when a low level signal is supplied to the two input terminals, and has a low level otherwise. That is, T-
When the output Q of the flip-flop 6b is low level and the door switch 4 or 5 is on, the output of the NOR 6c is high level, and otherwise it is low level.

The drive circuit 7 is a drive circuit for driving the interior illumination lamp 8, and when a high level signal is supplied from the logic circuit 6, the interior illumination lamp 8 is supplied with power from the battery power source + B and is turned on. In this embodiment, the case of one indoor illumination lamp will be described as an example, but when a plurality of indoor illumination lamps are provided, they may be connected in parallel.

FIG. 2 is a time chart showing the operation of the first embodiment. As shown in FIG. 2A, when the outside of the vehicle is brighter than the set illuminance and the output of the comparator 3 is at a high level, when the door of the driver's seat or the passenger's seat is opened, the time t is reached.
At 1, the door switch 4 or 5 is turned on. At that time, the output Q of the T-flip-flop 6b becomes high level like the output of the comparator 3, and the output state is stored. The output state of the T-flip-flop 6b before the time t1 depends on the output state of the comparator 3 when the door switch 4 or 5 was turned on last time, but it is not fixed here because it is not directly related to the present invention. Even when both the driver's seat and the passenger's seat are closed at time t2, the T-flip-flop 6b stores the high level output. In this state, since a high level signal is supplied to one input terminal of the NOR 6c, its output becomes low level, the drive circuit 7 is not activated, and the interior illumination lamp 8 is not turned on.

Next, as shown in FIG. 2 (b), when the outside of the vehicle becomes darker than the set illuminance at time t3 and the output of the comparator 3 changes to a low level, one of the doors is opened and the door switch is activated at time t4. 4 or 5 turns on, then T
The output Q of the flip-flop 6b becomes low level like the output of the comparator 3. As described above, the output state of the T-flip-flop 6b before time t4 is indefinite. Since the output Q of the T-flip-flop 6b is at the low level and the door switch 4 or 5 is turned on, both inputs of the NOR 6c are at the low level, and the output thereof is at the high level. Therefore, at time t4, the drive circuit 7 is activated and the indoor illumination lamp 8 is turned on. Further, when both doors are closed and both door switches 4 and 5 are turned off at time t5, a high level signal is supplied to one input terminal of the NOR 6c, and its output changes to low level. That is, the drive circuit 7 is stopped and the interior illumination lamp 8 is turned off.

On the other hand, as shown in FIG. 2C, when either door is opened when the outside of the vehicle is brighter than the set illuminance and the output of the comparator 3 is at a high level, the door switch 4 or 5 is turned on at time t6. Then, the T-flip-flop 6b
Output Q becomes high level. In this state, the drive circuit 7
Is not started, and the interior illumination lamp 8 is not turned on. Now, in this state, it is assumed that the passenger forgets to close the door and leaves the vehicle, or leaves the vehicle without noticing that the door is a half-door.
At time t7 thereafter, even if the outside of the vehicle becomes equal to or less than the set illuminance and the output of the comparator 3 changes to the low level, the door switch 4 or 5 remains on and the trigger input terminal T of the T-flip-flop 6b also goes low. Hold on to the level.
Therefore, the output Q of the T-flip-flop 6b does not change, and the drive circuit 7 is not activated by the NOR 6c.
That is, the interior illumination lamp 8 remains off.

As described above, since the exterior of the vehicle is dark when the door is opened and the interior illumination lamp is turned on when the door is opened, it is possible to forget to close the door or become a half-door. Even if the user leaves the vehicle without noticing, the interior illumination lamp is not automatically turned on when the outside of the vehicle is dark, and it is possible to prevent wasteful consumption of battery power.

-Second Embodiment- FIG. 3 is a circuit diagram of a second embodiment. It should be noted that devices similar to those shown in FIG. 1 are designated by the same reference numerals, and differences will be mainly described. Outside handle switch 9,
Reference numeral 10 is a switch for detecting an operation state of an outside handle of a vehicle door by an occupant, switch 9 is turned on when an outside handle of a driver's door is pulled, and switch 10 is pulled outside passenger's door. And turn it on. The remote control switch 11 is a door lock unlock switch of a remote control door lock device (not shown) that locks and unlocks the door lock by remote control operation, and turns on when the remote control unlocks the door lock. Further, the logic circuit 6A includes a one-shot timer 6d.
Is provided. The output of the one-shot timer 6d becomes low level for a certain period of time when the input changes from high level to low level. That is, when any of the switches 9 to 11 is turned on and the input of the one-shot timer 6d changes from the high level to the low level, its output changes from the high level to the low level, and the T-flip-flop 6b.
Triggers.

FIG. 4 is a time chart showing the operation of the second embodiment. Now, as shown in FIG. 4A, when the outside of the vehicle is brighter than the set illuminance and the output of the comparator 3 is at a high level, at time t11, the outside handle of the driver's seat or the passenger's door is pulled or the remote control is used. When the door lock release operation is performed, one of the switches 9 to 11 is turned on, the one-shot timer 6d triggers the T-flip-flop 6b, and its output Q becomes high level like the output of the comparator 3. But,
This high level output is supplied to one input terminal of the NOR 6c, whereby the output of the NOR 6c remains low level, and the drive circuit 7 is not activated. Therefore, the interior illumination lamp 8 is not turned on.

When the inside handle is operated to open the door, none of the switches 9 to 11 are turned on, and the door switch 4 or 5 is turned on at time t12, and the door switch 4 or 5 causes the T switch to turn on. -The flip-flop 6b is triggered and its output Q goes high, like the comparator 3. After that, the same operation as in the above case is performed, and the indoor illumination lamp 8 is not turned on.

Next, as shown in FIG. 4B, time t1
When the outside of the vehicle becomes darker than the set illuminance at 3 and the output of the comparator 3 changes to the low level, the outside handle of any door is pulled at time t14 or the door lock is unlocked by the remote controller. The one-shot timer 6d triggers the T-flip-flop 6b, and the output Q of the T-flip-flop 6b becomes low level. After that, when either door is opened and the door switch 4 or 5 is turned on at time t15, NO
Both of the two inputs of R6c become low level, and its output changes from low level to high level. by this,
The drive circuit 7 is activated and the interior illumination lamp 8 is turned on. After that, when the door is closed and both the door switches 4 and 5 are turned off at time t16, the output of the NOR 6c changes from the high level to the low level, the drive circuit 7 is stopped, and the interior illumination lamp 8 is turned off.

When the inside handle is operated and the door is opened, none of the switches 9 to 11 are turned on, and the door switch 4 or 5 is turned on at time t15, and the door switch 4 or 5 is turned on. -The flip-flop 6b is triggered and its output Q goes low like the comparator 3. After that, the same operation as in the above case is performed and the indoor illumination lamp 8 is turned on.

On the other hand, as shown in FIG. 4C, when the outside of the vehicle is brighter than the set illuminance and the output of the comparator 3 is at a high level, the outside handle of either door is pulled at time t17, or Even if the door lock release operation is performed by the remote control, the interior illumination lamp 8 is not turned on as in FIG. 4A. Now, in this state, it is assumed that the passenger forgets to close the door and leaves the vehicle, or leaves the vehicle without noticing that the door is a half-door. After that, time t19
Even if the outside of the vehicle becomes equal to or less than the set illuminance and the comparator 3 changes to the low level, the door switch 4 or 5 remains on and the T-flip-flop 6b is not triggered. Therefore, the output Q of the T-flip-flop 6b does not change and the drive circuit 7 is not activated by the NOR 6c. That is, the interior illumination lamp 8 remains off.

However, when the outdoor handle of any door is pulled at time t20 or the door lock is released by the remote controller, the switches 9 to 11 are operated.
Is turned on, the T-flip-flop 6b is triggered via the one-shot timer 6d, and the output Q of the T-flip-flop 6b changes to the same low level as the output level of the comparator 3. As a result, NOR6c
Both of the two inputs become low level, the output of NOR 6c becomes high level, the drive circuit 7 is activated, and the indoor illumination lamp 8 is turned on. After that, when all the doors of the vehicle are closed and both the door switches 4 and 5 are turned off at time t21, one input of the NOR 6c becomes high level, its output changes to low level, and the drive circuit 7 is stopped. The indoor illumination lamp 8 is turned off.

In this way, the outside illuminance is detected again when the outside handle is pulled or the door lock is unlocked by the remote controller, and the outside illuminance at that time is darker than the set illuminance and the door is dark. Since the interior illumination lamp is turned on when the vehicle is opened, only the normal operation for getting on the vehicle when it is dark and returning to the vehicle is performed, and the non-illumination according to the first embodiment is performed. The indoor illumination lamp in the state can be automatically turned on.

The logic circuit is not limited to the circuits of the above-described embodiments, and any circuit may be used as long as it has the same function and operation. Further, in each of the above embodiments, the logic circuit is configured by using the logic element, but a microcomputer may be used to drive and control the turning on / off of the lamp by software.

In the structure of the above embodiment, the optical sensor 1, the amplifier circuit 2 and the comparator 3 serve as the light and dark detecting means, the door switches 4 and 5 serve as the open / close detecting means, and the inverter 6a and the T-flip-flop 6b serve as the storing means. ,
The NOR 6c constitutes the control means, the drive circuit 7 constitutes the drive means, and the outside handle switches 9 and 10 and the remote control switch 11 constitute the boarding intention detecting means.

[0026]

As described above, according to the invention of claim 1, the illuminance outside the vehicle at the time when the door is opened is darker than a preset value, and when the door is opened, the interior illumination lamp is turned on. Since it is turned on, even if you forget to close the door or leave the vehicle without noticing that it is a half-door,
When the outside of the vehicle becomes dark, the interior illumination lamp is not automatically turned on, and it is possible to prevent wasteful consumption of battery power. According to the invention of claim 2, the exterior illuminance is detected again at the time when the passenger's intention to get on the vehicle is detected, and the exterior illuminance at that time is darker than the set illuminance and the interior lighting is provided when the door is opened. Since the light is turned on, in addition to the above effect, the indoor illumination light can be turned on only by performing a normal operation for getting on the vehicle when it returns to the vehicle in the dark.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a first embodiment.

FIG. 2 is a time chart showing the operation of the first embodiment.

FIG. 3 is a circuit diagram of a second embodiment.

FIG. 4 is a time chart showing the operation of the second embodiment.

[Explanation of symbols]

 1 Optical Sensor 2 Amplifying Circuit 3 Comparator 4,5 Door Switch 6,6A Logic Circuit 6a Inverter 6b T-Flip Flop 6c NOR 6d One Shot Timer 7 Drive Circuit 8 Indoor Illumination Light 9,10 Outside Handle Switch 11 Remote Control Switch

Claims (4)

[Claims] 1. A light / dark detecting means for detecting an illuminance outside the vehicle, outputting a bright signal when the detected illuminance is larger than a preset value, and outputting a dark signal when the detected illuminance is equal to or less than the set value. Opening / closing detecting means for detecting an open / closed state of the door; storage means for storing an output signal of the light / dark detecting means when the opening / closing detecting means detects a change in the state of the door from closed to open; In the vehicle interior lighting device, the dark signal is stored in the vehicle and the opening / closing detection means detects the open state of the door, and the driving means turns on the indoor illumination lamp. . 2. The vehicle interior lighting device according to claim 1, further comprising boarding intention detection means for detecting a boarding intention of an occupant, wherein the storage means detects the boarding intention of the occupant by the boarding intention detecting means. The vehicle interior lighting device is characterized in that the stored contents are erased at that time, and the output signal of the brightness detection means at that time is stored again. 3. The vehicle interior lighting device according to claim 2, wherein the boarding intention detecting means is a detection switch for detecting an opening operation of a door handle provided outside the vehicle. Lighting equipment. 4. The vehicle interior lighting device according to claim 2, wherein the boarding intention detecting means is a remote control switch for remotely unlocking the door lock device from outside the vehicle. Interior lighting equipment.