JPS63242748A - Vehicle lamp control device - Google Patents

Abstract

PURPOSE:To facilitate the setting of the brightness of a lamp by providing a light receiving part for detecting the brightness/darkness outside a vehicle and carrying out automatic lamp control with the brightness of the outside at the time of carrying out the ON/OFF of a manual lamp switch as a threshold. CONSTITUTION:When a manual tail lamp switch SW1 is closed, the output (e) of an OR circuit 6 enters the input (m) of a threshold renewing circuit 4 and the signal phi of brightness on the outside of a vehicle from a light receiving part 1 is inputted into a threshold deciding circuit 2. This value is stored in a judging circuit 3 as the lighting threshold psi1 of a tail lamp. And, by comparing the two, it phi<=psi1, outputs (q), (r) are made one (1) and the inputs of the OR gates 6, 7 become one (1), lighting a tail lamp 15 and a head lamp 14. Thereby, in an automatic lamp control device for a vehicle, the brightness level for turning ON/OFF of a lamp can be set by the judgement of the driver.

Description

[Detailed description of the invention] (7) Technical field The present invention relates to a vehicle lighting control device for an automobile.

Here, vehicle lights refer to things such as headlamps and tail lamps that need to be turned on when it is dark, but do not need to be turned on when it is bright.

The present invention relates to an improvement in a control device that automatically turns vehicle lights on and off depending on the brightness of the outside world of the vehicle.

(G) Conventional technology The use of electronics in automobiles has been progressing more and more in recent years. More and more electrical devices are now operating automatically.

Conventionally, turning on and off the vehicle's lights has been done manually by the driver. They were opening and closing manual lamp switches.

Automatic lighting/extinguishing devices that do this automatically have already been created. FIG. 2 shows a conventional example.

The light-receiving sensor section detects the degree of brightness and darkness outside.

Let this brightness be Φ.

In the control unit, a lighting threshold of 1 and a lighting threshold of φ2 are determined and stored in advance.

When the current brightness, that is, the current value Φ, becomes below the lighting threshold Φl, the lamp is automatically turned on. When the current value Φ exceeds the extinguishing threshold 152, the lamp is automatically extinguished.

In order to provide hysteresis, φ1 < φ2 is set.

The control circuit unit opens and closes the relay, turning the lamp on and off.

This statement may seem simple, but it is not necessarily so.

1 in the threshold for turning on, 2 in the threshold for turning off.
varies depending on the driver's preference. It's not the same for everyone.

Therefore, the driver must set the on-on threshold (medium 1) and the off-light threshold (φ2) in advance.

Although the threshold can be set freely, this has to be done subjectively by the driver, which is troublesome. It cannot be set in advance by the car manufacturer.

In this case, Φ1 and IIJ2 are set by changing the brightness of the outside world and subjectively determining whether to turn the lights on or off based on the brightness.

To do this, there must be an examination room that can freely change the brightness and darkness, and even if such an examination room were available, it would take time to set up Ip2 for the first year of junior high school.

Furthermore, since the circuit for setting the thresholds φ1 and φ2 was conventionally located in the light receiving sensor section, there was a problem in that the light receiving sensor section became large.

V) Purpose It is an object of the present invention to provide a control device that automatically turns on and off the lights of an automobile, and in which it is extremely easy to set the threshold for turning on and turning off the lights.

A second object of the present invention is to provide a vehicle lighting control device whose control circuit can be simplified and downsized.

) configuration A light receiving section is provided to detect the degree of brightness and darkness outside.

The current value Φ of external brightness can be known from the light receiving section.

In the present invention, the external brightness when the driver last closes the manual lamp switch to turn on the lamp is detected and stored, and this is used as the lighting threshold.

The external brightness when the driver judges that it is time to turn on the light is set as the threshold φ1.

When set to automatic on/off mode, external brightness Φ is Φ≦Ψ
When it reaches 1, the lamp will automatically turn on.

Similarly, the brightness when the driver last manually turned off the lamp is detected and stored, and this is set as the light-off threshold ip□.

When set to automatic on/off mode, external brightness Φ is Φ〉Φ
If it is 2, the lamp is automatically turned off.

A mode in which the lamp is turned on and off by manual operation.
For simplicity, we will use manual mode.

On the other hand, the mode in which the lights turn on and off automatically is called the automatic mode.

The content of the present invention can also be rephrased as follows. In manual mode, when the switch is last turned on or off, the brightness of the outside world at that time is set to the threshold φ1,
LI+2, and in automatic mode, if Φ1≧(1), the light is turned on, and if ``'2≦Φ, the light is turned off.

However, hysteresis φ2>φ must be provided. In the manual mode, when Φ2 does not satisfy the hysteresis condition, priority is given to Φ1, which is a threshold determined from the brightness of the outside world at the last on/off time of the lamp switch. That is, Φ is determined, and hysteresis is added to the middle 1 to determine φ2.

FIG. 1 shows a circuit diagram of the present invention.

This shows switches SW1 to SW5, a sensor section A1 control circuit B1, a headlamp 14, a taillamp 15, a taillamp relay 12, a headlamp relay 13, and the like.

Control circuit B has terminals T1 to 1 for connecting to external circuits.
It has T. Actually, a wire harness extends from an external electrical component and is connected to a connection terminal of control circuit B by a connector. However, when explaining the circuit construction,
It is possible to omit connection using the connection terminals T1 to T9. Hereinafter, descriptions of connection terminals will be omitted for simplicity.

One end of the manual tail lamp switch SW1 is grounded, and the other end is connected to the inverting input a of the OR gate 6.

One end of the manual headlamp switch SW2 is grounded, and the end thereof is connected to the inversion input of the OR gate 7.

There are two types of lamps: head lamp 14 and tail lamp 15, so switches sw1, sw2 and or gate 6.
7. Two AND gates 8.9 will be required. There are only two of these circuits with the same configuration. The actions are the same. If you understand one thing, you can understand the others.

The judgment circuit 3 has a function of determining the brightness of automatic lighting and automatically lighting the lamp. The decision circuit 3 has two outputs qs r as decision outputs, which are connected to the other input c1 d of the OR gate 6.7.

The output e1f of the OR game 1-6.7 is connected to the input mSn of the threshold update circuit 4.

The outputs e, f of the OR gate 6.7 are, on the other hand, connected to one input of a two-man AND gate 8.9.

The output 'sj of the AND gate 8.9 is connected to the base of the transistor 10.11. The emitters of these transistors are grounded. The collector 1 l is connected to one end of the excitation coil of relay 12.13.

The other end y1z of the excitation coil and one of the contacts are connected to a power source. The other relay contact is connected to the headlamp 14 and taillamp 15. The ends of the head lamp 14 and tail lamp 15 are grounded.

The automatic switch SW3 is a switch for specifying whether to use automatic mode or manual mode.

When automatic switch SW3 is open, the light will not turn on and off automatically. The light will automatically turn on and off only when it is closed. When in automatic mode, manual headlamp SW2 and manual taillamp SW1 are locked and do not close.

The threshold determination circuit 2 includes a lamp switch sw1
, the external brightness when sw2 is closed is stored as a lighting threshold φ, and this is compared with the current value Φ, and if φ1≧Φ, the light is turned on.

Further, the threshold determination circuit 2 includes a lamp switch sw.
1. The brightness when sw2 is opened is stored as the light-off threshold φ2, and this is compared with the current value Φ.
If ≦Φ, the light goes out.

When the lamp should be lit, the output q%r is set to 1. When the light should be turned off, the output q%r is set to O.

The light receiving section 1 of the sensor section A receives external light and outputs the degree of brightness and darkness of the outside world as an electrical signal. For the light receiving section 1, any photoelectric conversion element such as a photodiode, a phototransistor, a photocell, etc. can be used. The amplified output of the photoelectric conversion element is an electrical signal Φ that represents brightness.
become.

The threshold updating circuit 4 updates the thresholds tp1 and φ2 by opening and closing a manual switch.

SW4 is an ignition switch.

SW5 is a courtesy switch that closes when the door opens.

(a) Operation Assume that the automatic switch SW3 is open. At this time, the light does not turn on or off automatically. This period is necessary to determine the brightness of the outside world at which the lights should be turned on and off according to the driver's preference, that is, the threshold for turning on and off, medium 1 and medium 2.

Hereinafter, the logic values of the circuit will be simply expressed by 51# for H level and 10' for L level. First, I will explain the tail lamps, but the same goes for the head lamps.

(1) Manual mode Assume that the driver closes the manual tail lamp switch SW1. The judgment circuit 3 is in the judgment abort state, and the output qs" is 0.
It is. Q=Q, a==Q.

The inputs of OR gate 6 are a and C, e=a +c (5) Therefore, the output e of the OR gate becomes e=1.

The forget-to-turn-off determination circuit 5 normally has outputs g and h=1.

Therefore, the output i of the AND gate 8 is i=e−g,<
6>, so i rises from 0 to 1. transistor 10
is turned on and relay 12 is energized. This turns on the tail lamp 15.

On the other hand, when tail lamp switch SW1 is opened, a=Q
Therefore, 6==Q, and i=Q. As a result, the taillight goes out.

The same applies to the operation of the manual headlamp SW2. For OR gate 7 and AND gate 9, f” = b + d (7) j = f
The expression °h (s) holds true. The headlamp 14 lights up when j=1.

Now, when the manual tail lamp switch sw1 is closed, the output e of the OR circuit 6 enters the input m of the threshold update circuit 4. A current brightness signal Φ from the light receiving section 1 is input to a threshold determination circuit 2. The judgment circuit 3 uses the value at this time as the tail lamp lighting threshold φ.
remembers.

The same applies to headlamps.

When the headlamp SW2 is closed, the output f of the OR circuit 7 enters the input n of the threshold update circuit 4. The brightness signal Φ at this time is obtained and is stored in the judgment circuit 3 as the headlamp lighting threshold.

The above describes the determination of the lighting threshold.

The same applies to the determination of the light-off threshold J2.

Manual lamp switch sw1. The brightness Φ of the outside world when sw2 is opened is stored as a light-off threshold Φ2.

In this way, by repeating manual operations, the first light-on threshold and the second middle light-off threshold are determined.

It is important that this decision operation be made naturally during the process of actually driving the car. There is no need for the driver to go into a laboratory equipped with a light control device, judge the brightness, and subjectively determine the brightness level for turning on or turning off the light.

(1i) Automatic mode Now, turn on threshold Φ1, turn off threshold φ
2 is determined and the light turns on and off automatically.

Close automatic switch SW3. Manual switch SW1, S
W2 is open. When in automatic mode, these switches cannot be turned off.

When the ignition SW4 is closed and the automatic switch SW3 is closed, the judgment circuit 3 starts automatic lighting/extinguishing operation.

The current value signal Φ of the brightness of the light receiving section 1 enters the judgment circuit 3 from the threshold judgment circuit 2 at the input t.

The judgment circuit 3 compares the current value Φ and the lighting threshold φ1.

If Φ>Φ1, the output q% r is kept at O.

The surroundings become dark and Φ≦15. If so, set the output q1r to 1
Make it. Then, the inputs c and d of the OR gate 6.7 become 1. The output ix j of AND gate 8.9 also becomes 1. The tail lamp 15 and head lamp 14 are turned on.

In order to stabilize this state, hysteresis is provided. In other words, Φ2>Φ.

Such operations can be performed independently for the headlamps and taillamps.

Therefore, the thresholds of both lamps are φ1)15s4. Of course, they may be the same. This is determined by the driver's switch operation and is not predetermined.

The lamp continues to light as long as Φ≦Medium.

Suppose that the external brightness increases and becomes Φ≧middle 2.

In other words, it exceeds the lights-out threshold. Then, the output qsr of the judgment circuit 3 becomes 0.

The output e1f of the OR gate also becomes O, which is different from the output i1 jto of the AND gate. Relays 12.13 are opened. Lamps 14.15 go out.

The forget-to-turn-off determination circuit 5 has no direct relation to the main configuration of the present invention. However, this is also provided to extinguish the lamp. There is a function that turns off the lamp when it remains on even though the car is stopped and the door is open.

If the car is stopped, the ignition switch SW4 is turned off, the door is opened and the courtesy switch SW5 is turned on, and the manual lamp switches SW1 and SW2 are turned on, this means that you forgot to turn it off.

It is determined that you forgot to turn it off, and output g1 according to the determination result.
Let h be 0. Then, the output of AND gate 8.9 'z
j becomes 0 and lamps 14 and 15 go out. - (2) Effects (1) In a device that automatically turns off and turns on car lamps, the brightness level of turning on and off can be set by the driver's judgment. Since it is not a fixed level, we can respond to any request.

(2) It is extremely easy to set the threshold level for turning on and off. Does not require a laboratory with a dimmer. No special operation is required for level setting. This is because it remembers the brightness Φ of the outside world when the driver turns on and off the lights.

(3) The space for the sensor section and control circuit can be reduced. This is because the circuit does not have a part (pariohm) that can be adjusted externally. Since it can be integrated into a small circuit, A J B (
active junction box).

[Brief explanation of drawings]

FIG. 1 is a circuit configuration diagram showing an example of a vehicle lighting control device of the present invention. FIG. 2 is a schematic configuration diagram of a conventional vehicle lighting control device. 1...... Light receiving section 2...... Threshold judgment circuit 3
...... Judgment circuit 4 ...... Threshold update circuit 5
・・・・・・・・・ Forgot to turn off judgment circuit 6.7...
・・・・・・ Or Gate 8.9・・・・・・・・・
AND gate 10.11... Transistor 1
2.13 ・・・・・・ ri shi -14.15 ・・・・・・ la
Switch SW1 Manual tail lamp switch SW2 Manual headlamp switch SW3 Automatic switch SW4 Ignition switch SW5
・・・・・・ Inventor of courtesy switch
Yuki Hattori Hideo Odagaki Patent applicant Sumitomo Electric Industries Co., Ltd. Application agent Patent attorney Shigeru Kawase Itsuki-1,):
i j:'lj'l':

Claims (8)

[Claims] (1) Light receiving unit 1 that detects the degree of brightness Φ outside the car
and the external brightness Φ at the moment the manual lamp switch is closed.
a threshold determination circuit 2 that stores the external brightness Φ at the moment when the manual lamp switch is opened and sets it as the turn-on threshold Ψ_1; an automatic switch that switches between manual mode and automatic mode; A judgment circuit 3 that compares the current external brightness Φ with a lighting threshold Ψ_1 when in the manual mode and turns on the lamp if Φ≦Ψ_1 and turns off the lamp if Φ≧Ψ_2; A threshold update circuit 4 is provided which updates the lighting threshold Ψ_1 according to the brightness Φ when the manual lamp switch is closed and updates the extinguishing threshold Ψ_2 according to the brightness Φ when the manual lamp switch is opened. Features of vehicle lighting control device. (2) The automatic switch SW_3 switches between a manual mode in which the lamp is turned on and off by manual operation, and an automatic mode in which the lamp is turned on and off by the threshold judgment circuit 2, judgment circuit 3, and light receiving section 1. A vehicle lighting control device according to claim (1), characterized in that: (3) The vehicle lighting control device according to claim (1), wherein the lamp to be automatically turned on and off is a headlamp 14. (4) The vehicle lighting control device according to claim (1), wherein the lamps to be automatically turned on and off are headlamps and tail lamps. (5) Claims (3) or (4) characterized in that the circuit 5 includes a forget-to-turn-off determination circuit 5 that determines whether the lamp has been forgotten to turn off in automatic mode and turns off the lamp. Vehicle lighting control device. (6) A claim characterized in that the threshold determination circuit 2, the determination circuit 3, the threshold update circuit 4, the forget-to-turn-off determination circuit 5, and the transistor that opens and closes the lamp drive relay are provided in an active junction block. The vehicle lighting control device according to item (5). (7) The circuit that opens and closes the relay that turns the lamp on and off is
An OR gate that performs the sum operation of the inverted signal of the manual lamp SW and the output signal of the judgment circuit 3, an AND gate that performs the product operation of the output of the OR gate and the output of the forget-to-turn-off judgment circuit 5, and the output of the AND gate. A vehicle lighting control device according to claim 5, characterized in that it consists of a transistor that turns on and off. (8) The forget-to-turn-off determination circuit 5 determines that the light has been forgotten to turn off when the ignition switch is off and the door is open, and turns off the light. Vehicle lighting control device.