JPS5948243A - Light controller for vehicle - Google Patents

Abstract

PURPOSE:To turn ON or OFF the light suitably, by providing darkness/light judging circuit means with means for detecting the state of weather so as to allow a darkness/light threshold level to be set. CONSTITUTION:In a light controller for vehicles that turns on a light only if it is judged that it is dark and the car is running, respectively by the drakness/light judging means 2 that compares the outside illumination detected by a light sensor 1 with a prescribed darkness/light threshold level, and by running judging means 4 for judging whether the car is running or not based on the output of a car speed detector 3, the threshold setting means 24 is provided that allows a darkness/light level to be set based on the output of the weather detecting means 21 for detecting the state of weather. Thus, according to the change in the weather, the light will be turned ON or OFF suitably at any time.

Description

[Detailed Description of the Invention] This invention automatically turns on and off the lights in response to the running and stopping of the vehicle and the brightness and darkness of the illuminance outside the vehicle, and also allows the lights to be turned on and off appropriately in response to changes in the weather. (As shown in Figure 12) Fltl, related to the control device.

Conventional dual-use light control (f'i &-1,)'(nee+: Compare the city illuminance 1 level detected by the sensor with the predetermined light/dark 7th threshold level (7, '2') In writing
A light/dark judgment circuit determines that the illuminance level is below the bright/dark threshold level, and the vehicle's "i! ? On the way”.

A running/stopping group that determines whether it is “stopped”; 17 circuits;
An AND circuit that takes the AND of the outputs of the above-mentioned brightness/dark judgment circuit and the travel/Ihe/111 publication circuit is constructed as follows:
Only when the above-mentioned "dark" and "i1-in line" outputs are supplied to the logic circuit, the logical product is established and the active circuit is turned 9' to a given light. 1 jill ki-
Turn on the IL1nfJ light and the vehicle width light (
1″′・1rυ.

In addition, the light/dark thresholds determined in the above-mentioned light/dark judgment circuit are generally based on weather conditions with high occurrence of encounters, i.e., in the direction of fire or on cloudy skies: The threshold value for lighting is JIJ, t (Lee-2()~
1OO1x, ilt f, n3. The light/dark threshold for the light is set to correspond to an illuminance of 100 to 300 tx at dusk.

According to the vehicle light control device configured as described above,
This is convenient because the driver does not have to operate the light switch each time to prevent dazzling other vehicles when stopping temporarily at an intersection or the like when driving at night, and to reduce the load on the battery.

However, the conventional vehicle light system f!
11 device, the light/dark threshold in the constant circuit is fixed to a constant value as mentioned above, so in the case of rain, for example, the brightness/darkness threshold of the brightness 1 tone 1'11 constant circuit is fixed at a constant value. Even if it is above the threshold, it is difficult for the driver to check the road ahead, and in such cases, the driver has to manually operate the Lites R Tsuchi each time, which is inconvenient. there were.

The present invention, as in the above-mentioned conventional example, includes a brightness/darkness determination means that determines that the illumination outside the vehicle is dark when the illumination outside the vehicle detected by the optical sensor is below a predetermined brightness/darkness threshold, and a heavy speed detector. L:
and a running determination means for determining that the heavy vehicle is "running" due to the force A, and the "dark" and "shifting" are J':, &rl ll'll It- Rewrite will be performed only during the specified period.
It r. Kawazozu 1 boxer, said brightness determination means e (
1,',O・・''1. , j゛.

Next, use the F91 dark [7 ifj] 1-'4:
+ ';+7 z, l, t, ,・-r l・It5 lights・
Vehicle light fl/+++t+ that allows lights to be turned off
l'i + rental equipment 1 ■.

Hereinafter, embodiments of the present invention will be explained in detail using the drawings.

・Figure 1 shows a medium-sized light flti, l according to the present invention.
7 is a block diagram showing an embodiment of the MJF Kasumi.
, (: d S, photodiode, etc.'s light weight, 1!I', degree is detected by the light weight and the baby, and the detected vehicle exterior lighting 1 signal is supplied to the light/dark judgment circuit 2 (IL).

The brightness/darkness determination circuit 2 determines the brightness/darkness of the illumination outside the vehicle based on the above LIK:
1, from the rainy weather detection circuit 21, the 11j weather threshold generation circuit 22, the normal threshold generation circuit 23, the threshold value Kirioka circuit 24, and the comparison circuit 25, 41! has been completed.

The rainy weather detection circuit 21 detects whether the weather condition is large or not, and includes, for example, a circuit that detects whether the wiper is being moved downward, or a raindrop sensor. There is.

The threshold switching circuit 24 switches the bright and dark 12 threshold signals supplied to the comparator 25 in response to the output of the rainy weather detection circuit 21. When the rainy weather threshold generation circuit 22 outputs the light/dark threshold signal to the comparator circuit 25, the light/dark threshold signal output from the normal threshold generation circuit 23 is supplied to the comparator circuit 25. The threshold signal is supplied to the comparator circuit 25.

The above-mentioned normal threshold generation circuit 23 sets the illuminance 20 to 1 OOtx, east side light V (: The brightness threshold is illuminance 100 to 3 (] OA
x 4I: 1 Itr+Riki and Zuto also L 4'c
II,',': Determined.

゛Ma/ko, during the above rainy weather (, 2 Kii 1 Nago 1゛ Earth circuit 22
&-11, Lights need to be turned on in rainy weather 7p/riI
It, z, -l, , ilr, the above 17 as four gates.
rf sky・(・)Celestial time light/dark threshold i? i, t: Limon'T dry bright light IT, for example, 1 month i) τ threshold 11C [for example, light II 3 t3.
U ~l OO<) 'k/-x, 1 day i'''I
Ll't' This is 1x bright and dark, and the illuminance is 1.011~:3 f) l) Ax; ll e-'
It is set so that the output is +1'cL.
, above, Mett, 'FR circuit 25 it, I
, t Ml''t The light sensor 1 supplied from the 5 iti 4 circuit 24 + 1rj + old level and the 4'IA IJ output from the optical sensor 1 + +r<
, re, - Comparing with the signal level, the - red θ1 light level is r than the value level of -1 - 5 3 light 11 yen.
1.1 iti (n" is ° + p
It determines that it is F II and outputs November "i" for logic 1j.

In addition, the heavy speed sensor 3 detects the heavy vehicle lI'':?T;, 17
Outputs a pulse train with a frequency proportional to 7 ships, and
・It supplies the stop toe I'll constant circuit 4, and the 1 y (17・stop"1'41 constant) -11 path 4 outputs the pulse train 1.-: from the vehicle speed sensor 3. This system determines whether the vehicle is running or stopped depending on whether the vehicle is moving or not, and outputs a logic signal corresponding to the determination result. , the on/off logic circuit 5 is a circuit that calculates the product of the output of the comparator circuit 25 and the output of the run/stop judgment circuit 4, and calculates the Only when the comparator circuit 25 supplies a judgment output of ``compensation'' and the running/stopping judgment circuit 4 supplies a judgment output of ``'5] 2nd line'', the logical product case is established. Then, the drive circuit 6 is activated to turn on the light 7.

Note that 8 is a battery mounted on the vehicle, and is used as a power source for the light 7 and F1 type electric components.

FIG. 2 is a diagram showing an example of a circuit configuration more specifically showing the configuration of the brightness/darkness determination circuit 2. As shown in FIG.

In the figure, the outside illuminance signal supplied from the optical sensor 1 to the comparator 25, that is, the potential at point P in the figure, increases as the outside illuminance decreases, and the comparator 25 detects that the outside illuminance signal level is set to the reference voltage v8. When the level exceeds the level of , a high level signal corresponding to a logic signal "1" is output.

The rain detection circuit 21 shares the drive switch 21a of the wiper circuit 9 that drives the wiper, and is configured to branch and output the power supply V for the wiper circuit 9 when the drive switch 21a is turned on. .

This means that the drive switch 21a is turned ON in rainy weather.
This is something that takes advantage of what happens.

The threshold switching circuit 24 is configured such that the drive switch 21a is set to O.
The transistor Tr is configured to turn on in response to the application of the power supply voltage V when the transistor Tr is turned on.

In addition, the rainy weather threshold generation circuit 22 and the normal threshold generation circuit 23 are composed of resistor voltage divider circuits that divide the power supply voltage V by a combination of resistors R and +R1eR4. ), the drive switch 21a is set to O.
If it is an FF, the transistor Tr is also in the OFF state, so no current flows through the resistor R1, and the two resistors R,...
i? , , the reference voltage Vs is created.

Then, if the above drive switch 21a is turned on,
When the transistor Tr is turned on, the resistor R1
The current is 6ff, and the resistor R4 is 1J (because it is connected in parallel with the resistor R3, the above reference voltage Vs is +if
l It is lower than usual by the definition level.゛'' As in 2 <
tl'# 1 in completed vehicle light control device t
In bright conditions such as during the day, the illuminance outside the city detected by the optical sensor 1 is higher than the light/dark threshold, so the output of the comparator circuit 25 will be 0'', indicating whether the vehicle is ``running'' or ``stopped''. Regardless of whether the light is inside or outside, the logic sale of the light-on/off logic circuit 5 is not established, and the light 7V1: is not lighted.

7) At sunset, at night, or when driving in a dark tunnel, the illuminance level outside the city is below the brightness threshold,
And during the period when the solidity is 9 during 1 running, the outputs of the comparator circuit 25 and the running/stopping circuit 4 are both "1", the logic condition of the light on/off logic circuit 5 is satisfied, and the light 7 is automatically turned on. be done.

Further, even if the above-mentioned outside illuminance level is below the bright/dark threshold, if the vehicle is "stopped", the output of the running/stopping determination circuit 4 becomes '0', and the light on/off logic circuit 5 The logical product condition is not satisfied, and the light 7 is automatically turned off.

Furthermore, in rainy weather, the light/dark threshold image signal output from the rainy weather threshold generation circuit 22 is supplied to the comparison circuit 25, so that the light is normally turned on at sunset (during clear skies and cloudy skies). The lights are turned on while the illuminance is slightly brighter than the illuminance outside the vehicle. Therefore, when the visibility of the surrounding area is reduced due to rain, by turning on the lights early, it is possible to drive more safely.

FIG. 3 is a block diagram showing the electrical configuration of an embodiment of the vehicle light control device of the present invention using a microcomputer. In the figure, the same parts as those in the embodiment shown in FIG.

In the figure, 10 is, for example, a one-chip microcomputer (JJ, below, not referred to as CPU) mounted on this type of vehicle, which is used as a RAM working area in memory 11, and is Processing related to write control of the present invention is executed according to a stored system program.

The vehicle exterior illuminance signal output from the optical sensor l is input to the CPU l0 via the A/D vision: 4e'B:÷, and the wiper switch 13 output signal is input via the interface 14'r. is entered.

The above wiper switch 13t drives the wiper.

In addition to stopping, intermittent operation, low-speed operation, high-speed operation, etc.
The operating speed of the wiper is set according to the magnitude of the wiper switch 13, and since the weather conditions can be determined by the operating position of the wiper switch 13, it is also used as a top plate detector here.

Furthermore, the running/stopping judgment output from the running/stopping judgment circuit 4 is manually input to the CPU10 via an interface 15, and a light on/off instruction signal is input from the CPUIO via an interface 16. I am familiar with the configuration for output.

FIG. 4 shows the 7 according to the present invention stored in the ROM.
It is a flowchart showing the structure of the system program,
Referring to this flowchart below, the operation of the medium-thick print control collapse]-1.) 2nd rule of this embodiment will be explained.

First, in step 31, the illuminance data outputted from step 12 is read and stored in the illuminance register provided in the working area.

Next, in step 32, the position data of the wiper switch manually input through the interface 14 is inputted.
1:Include, F) Store in the fixed weather condition register.

Next, in step 33, the position data stored in the above-mentioned heaven 11 no, state 1, 1 body shi/star is entered! 1
'j Then check whether the wiper is being driven or not.
IIe'r If YES, proceed to step 34.
If NO4, proceed to step 36.

In step 36, the light/dark threshold direct data Rop B-1+R2,ktl stored in advance in the memory is
Of these, the bright/dark threshold data R6 at the current time (119 people/cloudy sky) is stored in the bright/dark threshold register Rm, and the process is repeated in step 40.

There is a relationship between Ro< it, <lt, and <1(3) between the above light 11rf L once data 1.1o and R8. Data corresponding to the bright and dark threshold illuminance in rainy scenes and heavy rain is set. 1t, li L, N O't' If yes, proceed to step 35. If YES, proceed to step 37, and set the above-mentioned light/dark threshold 111 and take R1 to the light/dark threshold register Rm.
to) 6 and 7'j 'Qt, step 40 and jump.

In step 35, based on the positive control data,
It is determined whether the wiper is operating at low speed or not. If YES, the process proceeds to step 38, and the brightness threshold data R is determined.
3 is stored in the bright/dark threshold register Rm, jump to step 40, and if NO, go to step 39. , proceed to step 40.

In step 40, the vehicle exterior illuminance data stored in the upper 612 illumination register and the above-mentioned] 612 illuminance register l
There is a storage space in ζm. Subtract and compare with the data.

Next, the process proceeds to step 41, and based on the result of the above comparison, it is determined whether the illumination level outside the vehicle is below the brightness threshold.
l,,YI! ;If S, proceed to step 42; NO
In that case, the illumination outside the vehicle is bright, so step 44
Proceed to , output the light turn-off instruction (No. 73), and turn off the door (if it is turned off, continue turning it off. The same applies to 1. below).

In step 42, the vehicle running/stopping determination data inputted through the interface 16 is analyzed to determine whether the vehicle is "in the middle or stopped."

In step 42 above, if it is determined that both cars are running, the process proceeds to step 43, where a light lighting instruction (ti is output) and light 7 is turned on (if it is lit, When it is determined that the vehicle is stopped (316), the process proceeds to step 44, where a light extinguishing instruction signal is output, and the light 7 is extinguished.

Vehicle light control fll device J constructed as described above.
-1, when the outside illuminance is below the light/dark threshold A111, such as at sunset, at night, or when driving in a 1117 tunnel, the lights are automatically turned on when the Oki vehicle is running, and when it is stopped E. The light will turn off automatically.

Is it still the first lieutenant of the mountain dog? ! Compared to sunny or cloudy days, when it is difficult to see all the women around you, the light turns on on the LY1E to improve safety. By setting the above-mentioned light/dark threshold (iI'H), it is possible to achieve two objectives of safety while reducing the battery cost.

In addition, in each example, the BIC lights are turned on and off based on the brightness and darkness of the outside vehicle illumination and whether the 714 cars are running or stopping. The headlights are suitable for use at night or in tunnels, even if the vehicle is in the middle of the road, such as the width lights and tail lights. To control what you can safely leave on in a dark place, it is sufficient to turn the lights on and off based on the light 1lii of the vehicle exterior lighting 17, for example, as shown in Figure 1. In the case of the embodiment, this can be easily realized by providing an emergency tow circuit that turns on and off the side marker lights and tail lamps based on the output of the comparison circuit 25.

(As mentioned above in 1j, the vehicle lights h1su*fi'j and 6b according to the present invention) are designed to improve the lighting conditions such as a, ambient illuminance, and enemy for the passenger as the weather changes. K
d1! : Even if L changes, it will always be a heartfelt one] Le V (,
The lights can be turned on and off automatically, and the hassle of manually operating the light switch as in the past can be eliminated, allowing for even safer driving.

4. Figure 1 is a block diagram showing an embodiment of the vehicle light control device according to the present invention, and Figure 2 is a specific circuit example of the brightness determination circuit in Figure 1. 3 is a block diagram showing another embodiment of the present invention, and FIG. 4 is a flowchart showing the configuration of a system program executed by the CPU shown in FIG. 3.

1...Light sensor 2...Bright/dark judgment circuit 3...Vehicle speed sensor 4...Run/stop judgment circuit 5...Lights on/off logic Circuit 7... Light 10... C
PU13... Wiper switch 21... Rainy weather detection circuit 22... Rainy weather threshold 11IN generation circuit 23.
... Normal threshold generation circuit 24 ... Threshold switching circuit 25 ... Comparison circuit Patent applicant Nissan Motor Co., Ltd.

Claims (1)

[Claims] (1) A light/dark judgment means that determines that the outside illuminance is "dark" when the outside illuminance detected by the optical sensor is below a predetermined light/dark threshold, and a means for determining whether the vehicle is "running" based on the output of the vehicle speed detector. A vehicle light control device comprising a driving determination means for determining whether the weather is ``dark,'' and which turns on the lights only during a period when both the ``dark'' and ``driving'' conditions are determined; A vehicle light control device comprising: weather detection means for detecting a state; and threshold setting means for variably setting the brightness/darkness threshold based on the output of the weather detection means.