JP3303122B2 - Control circuit for variable lamp color - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit for a variable lamp color which can select the lamp color of a fog lamp for an automobile, for example.

[0002]

2. Description of the Related Art Conventionally, yellow or white fog lamps have been used. However, in recent years, white or yellow fog lamps capable of selecting an arbitrary color have been used. FIG. 4 shows a circuit for driving a motor used in a conventional apparatus. In FIG. 4, a DC motor 1 is a motor driver 2
The rotation direction of the motor driver 2 is selected by a switch 3 formed of a conductive pattern and a color selection switch 4 connected via a diode 8a or 8b. Also, the motor driver 2 is supplied with power from the power supply unit V to the terminals c and d, and forwards, reverses, and opens the motor 1 by the voltage supplied to the terminals a and b, as shown in FIG. Any of the brakes is controlled. That is,
When the terminals a and b of the motor driver 2 are both at the H level, the terminals e and f are short-circuited and the motor 1 is braked. When the terminals a and b are both at the L level, the terminals e and f are open. When the terminal a is at the L level and the terminal b is at the H level, the motor 1 rotates forward, and when the terminal a is at the H level and the terminal b is at the L level, the motor 1 reversely transmits signals from the terminals e and f. It has become.

The switch 3 comprises a first switch composed of conductive patterns 3a and 3b disposed in parallel and a conductive short-circuit piece 3e for short-circuiting them, and a conductive pattern 3c.
And 3d and a conductive short-circuiting piece 3f for short-circuiting them, and the short-circuiting pieces 3e and 3f are arranged in a direction perpendicular to the patterns 3a to 3d as shown by the dotted straight lines, and
Is changed to linear motion, and both short-circuiting pieces 3e, 3f
Are configured to move together in the right or left direction. In the motor driver 2, a power supply voltage is supplied to the terminals a and b from the power supply unit V via the resistors 5a and 5b, and the output terminals e and f are connected to the motor 1 via the posistor 6.
Noise generated in the motor 1 is absorbed by the capacitor 7. The noise generated by the switch 4 is absorbed by the capacitor 8c or 8d.

In the state of FIG. 4, the lamp is in a white state, and terminals a and b of the motor driver 2 are connected to resistors 5a and 5b.
, And the motor 1 is braked. When the switch 4 is operated to the yellow side, that is, the position opposite to the position shown in the figure, in order to change from this state to yellow, the terminal a of the motor driver 2 is set to the H level as shown in the column of the symbol a in FIG. To L level. As shown in FIG. 5B, when the terminal a is at the L level and the terminal b is at the H level, the motor 1 is controlled to rotate forward.

As shown in FIG. 6, the rotation of the motor 1 moves the rack 83 in the direction of the ramp L via the worm gear 81, the worm wheel 87, and the pinion gear 82, so that the yellow glove 84 approaches the ramp L. When the yellow glove 84 is put on the lamp L, the short-circuiting piece 3e of FIG. 4 advances to a position where it does not come into contact with the pattern 3a. At this level, the brake is applied to the motor 1 and further advance of the yellow glove 84 and further movement of the short-circuit pieces 3e and 3f are stopped. Therefore, the yellow light transmitted from the lamp L via the yellow globe 84 is reflected by the reflector 86, illuminates the front, and operates as a yellow fog lamp. On the other hand, in the state of FIG. 6, since the yellow globe 84 does not cover the lamp L, it operates as a white fog lamp.

[0006]

However, in such a conventional apparatus, when the yellow globe covers the lamp, the light becomes yellow, but an intermediate color is displayed on the way, giving a sense of incongruity. Of the two fog lights,
If one of the control circuits fails to move the yellow glove due to a failure, the left and right fog lights have different colors, the sense of distance differs between the left and right, and there is a problem in safe driving.

The present invention has been made in view of such circumstances, and has been made in such a manner that the intermediate color is not displayed and the left and right colors do not become different even if one of the components fails.

[0008]

In order to solve such a problem, the present invention provides a method of moving a moving means (yellow globe 84) provided for each lamp until the moving means (yellow globe 84) reaches a position determined by a color selection switch (4). Driving means (motor 1 and motor driver 2) for driving, and a control signal transmission period regulating means for moving the movement means in conjunction with the movement of the movement means and sending a control signal supplied until the movement means reaches the stop position to the drive means. Moving position control circuit (PB
1, PB2), and while the control signal is being supplied to the driving means, the power supply to the lamp (L) is cut off and one of the moving position control circuits continuously sends out the control signal. A lamp control circuit (PB3) for forcibly turning on the lamp and controlling the control signal generated by the other position control circuit to have a polarity opposite to the polarity designated by the color selection switch when the lamp is turned on. It is. The moving position control circuit is configured to continuously transmit a control signal when the moving means does not move to the position designated by the color selection switch even after a predetermined time has elapsed. Further, the moving means has a colored glove, and when a control signal is continuously transmitted due to an abnormality of one of the moving means, the other moving means is controlled so as to match the moving position of the one moving means. It was done.

[0009]

[Function] In a normal state, the fog lamp is turned off by a control signal during a period in which the motor is driven, but in an abnormal state, the fog lamp is forcibly turned on and the color of the normal fog lamp becomes abnormal. Change to color.

[0010]

FIG. 1 is a circuit diagram showing an embodiment of the present invention. The same or corresponding parts as those in FIG. 4 are denoted by the same reference numerals and their description is omitted. Control units PB1 and PB2 are provided for individually controlling the lighting colors of the left and right fog lamps. The control units PB1 and PB1 have a power supply unit V and a switch 9 respectively.
The battery B is connected via the. Further, a control unit PB3 is provided for controlling the lighting of the fog lamp.
The control units PB1 and PB2 are a JK-type flip-flop U for storing the selection state of yellow or white by the color selection switch 4, a switch 3 for determining a period for performing color selection, a motor 1 for performing color selection, A motor driver 2 for controlling the rotation direction of the motor 1 and a resistor R1 as an accessory
To R4, diodes D5 to D6, and a posistor 6.

The control unit PB3 includes a fog lamp L, a relay RL for controlling the lighting or extinguishing of the fog lamp L and its contact rl, transistors Q30 to Q32 for controlling the relay RL, and a resistor R32 as an accessory.
To R42, capacitors C33 to C34, diode D3
1 to D35. The transistor Q
Reference numeral 32 is shown outside the dashed line enclosed as the control unit PB3 from the balance of the circuit diagram.

The switch 3 is composed of four parallel conductive patterns 3a to 3d arranged in order. The patterns 3a and 3b are formed by conductive short-circuiting pieces 3e provided at right angles to the patterns, and the patterns 3c and 3d. Is short-circuited at a later-described timing by a conductive short-circuiting piece 3f provided in a direction perpendicular to the above. Pattern 3
a is shorter in the longitudinal direction than the pattern 3b,
a and the left end of the pattern 3b are disposed at positions substantially coincident with each other. The pattern 3d is shorter in length in the longitudinal direction than the pattern 3c, and the right ends of the pattern 3c and the pattern 3d are arranged at positions substantially coincident with each other. Further, the pattern 3b and the pattern 3c have the same longitudinal dimension, and their end portions are also aligned.

When the motor 1 is stopped, an H level signal is supplied to the base of the transistor Q30 of the control unit PB3 through the resistor R4 of the control unit PB1, so that the transistor Q30 is turned on. Drives the transistor Q31 via the resistor R36, so that the transistor Q31 is also turned on to energize the relay RL. As a result, the contact rl of the relay RL is turned on, and the fog lamp L is turned on. Note that the fog lamps L are provided one by one on both the left and right sides, and these are connected in parallel.

When the color is switched from white to yellow, an H level signal is supplied from the power supply to the base of the transistor Q32 via the resistors R40 and R39 of the control unit PB3, so that the transistor Q32 is turned on. By switching the switch 4 to the yellow position, the terminal CLR bar of the flip-flop U of the control unit PB1 goes from the H level to the L level. Flip-flop U
Is set to RS when an L level signal is supplied to the terminal CLR bar.
The same operation is performed as when a signal is supplied to the reset terminal of the flip-flop. Therefore, the flip-flop U is reset, and outputs an L level signal from the Q output terminal and outputs an H level signal from the Q bar output terminal. As described above, the motor driver 2 outputs a signal for driving the motor 1 when the voltage levels of the terminals a and b are different.
e and 3f move rightward.

When the flip-flop U is reset, the Q output terminal changes to L level, so that the anode of the diode D5 also changes to L level, and the anode of the diode D30 connected to it also changes to L level.
Therefore, the base of the transistor Q30 becomes L level and is turned off, so that the transistor Q31 is also turned off. When the transistor Q31 is turned off, the relay RL is deenergized, so that the contact rl is turned off and the fog lamp L is turned off. That is, during the color change, the fog lamp L is turned off to prevent the state of the intermediate color.

When the short-circuiting pieces 3e and 3f of the switch 3 move rightward, the short-circuiting piece 3e eventually separates from the pattern 3a, so that the terminal a of the motor driver 2 changes to the H level,
Both terminals a and b of the motor driver 2 become H level, the motor 1 is braked, the rotation of the motor 1 is stopped, and the color change is stopped. At this time, the transistor Q30
Also changes from L level to H level, so Q30,
Q31 is turned on again, and the fog lamp L is turned on. That is, when the color change is completed, the fog light L
Lights up. The above is the description of one control unit PB1, but the other control unit PB2 also has the same configuration, and performs exactly the same operation because the input signal from the switch 4 is supplied in parallel.

The same is true when changing from the yellow state to the white state. By operating the switch 4 to the white position, the flip-flop U is set. The bar output terminal goes to L level. For this reason, the motor 1 rotates in the opposite direction from when the color changes from white to yellow, the short-circuit pieces 3e and 3f move to the left, and the operation of the motor 1 stops at the position where the short-circuit piece 3f stops contacting the pattern 3d. I do. Also at this time, during the color change, the transistors Q30 and Q31 are turned off, and the fog lamp L is not turned on. However, the fog lamp L is turned on by the end of the color change as described above.

Next, when the motor 1 does not operate even if a color change instruction is output due to a failure of one of the control systems, for example, the control unit PB1, the color of the fog lamp L1 driven by the control unit PB1 does not change. If the control system of the unit PB2 is normal, the fog lamps L2 driven by the control unit PB2 change colors, and in this state, the left and right fog lamps are controlled to different colors. In this state, the state in which one of the motors 1 does not operate is the same as the state during the color change, so that the relay RL does not operate and the fog lamps L1 and L2 do not light.
However, in this case, the fog lights L1, L
Leaving 2 unlit is dangerous and undesirable. Since one of the motors, in this example, the motor 1 of the control unit PB1 does not operate, the anode of the diode D5 or the diode D6 is at the L level.
Therefore, by connecting a series circuit of the diode D35, the diode D32, and the resistor R33 of the control unit PB3 to the anode of the diode D5, the anode side of the diode D35 is set to L level, and the transistor Q31 is forcibly turned on. Thus, when an abnormality occurs, the colors of the left and right fog lamps L are different, but the fog lamps L1 and L are forcibly forced.
2 is turned on.

However, since the left and right colors are different in this state and there is a problem in safety, the colors of the left and right fog lamps are matched as follows. During the color change, the anode of the diode D5 becomes L level,
3 and the time constant of the capacitor C31 are set to be large, so that the period during which the anode of the diode D5 is at the L level during the color change is short. In this time, the discharge amount of the capacitor C31 is small and the left end of the resistor R33 is at the L level. However, the collector of the transistor Q30 does not go low.

That is, an abnormal state, for example, the control unit PB
When the state in which the motor 1 does not operate continues, the charge of the capacitor C31 of the control unit PB3 is discharged via the resistor R33,
The charge of the capacitor C33 is discharged via the resistor R32. The capacitors C31 and C33 also discharge through the resistors R32 and R33 when the color changes normally. However, since the capacitance of the capacitors C31 and C33 is set large, the discharge time is limited when the color changes normally. Therefore, the capacitors C31 and C33 do not completely discharge. However, at the time of failure, since the discharge time is long, the capacitors C31,
C33 is completely discharged. The discharging time of the capacitor C33 is set shorter than the discharging time of the capacitor C31. First, when the capacitors C31 and C33 are completely discharged, a diode D32 and a resistor R39 are connected to the capacitor C31.
, The base of the transistor Q32 connected to the L level becomes L level, and the transistor Q32 is turned off. As a result, an H level signal is supplied to both the J and K terminals of the flip-flop U. Next, when the capacitor C33 is completely discharged, the flip-flop U of the control unit PB2 becomes
The K bar terminal goes to L level. JK flip-flop U
When an L level signal is supplied to the CK bar terminal when both the J terminal and the K terminal are at the H level, the output signal levels of the Q and Q bar terminals become the opposite levels.

At this stage, it is assumed that the control unit PB1 is abnormal, and the short-circuit pieces 3e and 3f of the control unit PB1 do not move in response to the color change instruction, and the control unit PB2 is normally changing color. Is assumed. Therefore, the control unit P
The short-circuit pieces 3e and 3f of B2 have moved, and the right and left fog lamps L1 and L2 have different colors. Since the capacitor C33 has been discharged due to the continuation of this state, the flip-flop U of the control unit PB2 has inverted the state, so that the motor 1 of the control unit PB2 rotates in the direction opposite to the rotation direction instructed when the color changes. As a result, the fog lamps L1 and L2 are controlled to the state before the color change. As a result, the left and right fog lamps are controlled to have the same color, that is, the color of the fog lamp that has become abnormal.

The above operation has been described in the case where the motor 1 in one of the control sections does not operate. However, even if the motor 1 operates, the short-circuit pieces 3e and 3f are in a mechanically locked state and stopped halfway. In the same way, the left and right fog lights L
Since the colors of the fog lamps L1 and L2 are the same, the color of the left and right fog lamps L1 and L2 is similarly controlled in this case. However, at this time, the current still flows through the motor 1, and it is not preferable to leave the motor 1 as it is.
In this case, the resistance of the posistor 6 inserted in series with the motor 1 increases, and the current flowing through the motor 1 decreases.

FIG. 2 is a circuit diagram showing another embodiment,
The control units PB1 and PB2 include a power supply unit V, a switch 3, a motor driver 2, a motor 1, and other circuits. Other circuits include transistors Q1 to Q3, resistor R1
To R12, capacitors C4 to C8, diodes D2 to D
6. The control unit PB3 is a diode D3
0 to D35, resistors R35 to R37, a relay RL, fog lamps L1 and L2, and a transistor Q31.

The operation of this circuit will be described with reference to the control unit PB1. When the switch 4 is selected to the position shown in the figure at the time of color change, the collector of the transistor Q2 is grounded via the diode D2 of the control unit PB1. In a normal state, the transistor Q1 of the control unit PB2 is supplied with an H-level signal to the base, so that the transistor Q1 is turned on. Therefore, the L-level signal is supplied to the base of the transistor Q2 of the control unit PB1. Have been. As a result, the transistor Q2 whose collector is grounded is turned on, and an L-level signal is supplied to the terminal a of the motor driver 2 via the patterns 3b and 3a of the switch 3.

The terminal b of the motor driver 2 is connected to a resistor R
Since the H-level signal is supplied through the motor 2, the motor driver 2 drives the motor 1 to rotate, and accordingly, the short-circuit pieces 3 e and 3 f move rightward. At this time, the diodes D5 and D6 of the control units PB1 and PB2 and the control unit P
Since an L-level signal is supplied to the base of the transistor Q31 via the diodes D30 and D31 of B3 and the resistor R35 of the control unit PB3, the transistor Q31 is turned off and the relay RL is deenergized. Therefore, the contact rl is turned off, and the fog lamps L1 and L2 are turned off.

When the short-circuiting pieces 3e and 3f move rightward, the short-circuiting piece 3e soon stops contacting the pattern 3a, and both the terminals a and b of the motor driver 2 change to the H level, and the motor 1 is braked. Further, the base of the transistor Q31 in the control unit PB3 becomes H level, and the fog lamps L1 and L2 are turned on again. That is, during the color change, the fog lamps L1 and L2 are prevented from being turned off to become an intermediate color, and the fog lamps L1 and L2 are turned on again by the end of the color change.

When changing from yellow to white, switch 4
Is set to the white position, the transistor Q3 is selected.
This transistor is off because an L-level signal is supplied to the base. Therefore, an H-level signal is supplied to the pattern 3b, and the L-level signal is supplied to the pattern 3c after the signal is inverted by the transistor Q4. As a result, the signal transmitted from the motor driver 2 outputs a signal for driving the motor 1 in the opposite direction to that when the motor 1 is changed from white to yellow. As a result, the light emission color changes from yellow to white by the same operation as described above.

When the motor driver 2 is driven, the anodes of the diodes D5 and D6 become L level and are supplied to the resistor R4. However, since the time constant of the capacitor C8 and the resistor R4 is set large, The capacitor C8 is not fully charged during the time period during which the driver 2 is driven, and the base of the transistor Q1 maintains the H level, so that the transistor Q1 continues to be on. However, when one of the lamps does not operate or stops halfway due to an abnormality, either of the input terminals a and b of the motor driver 2 is continuously at the L level, so that the capacitor C8 is fully charged and the transistor Q1 is turned off. The base voltage goes low, turning off the transistor Q1. Now, when the control unit PB1 becomes abnormal and an H level signal is output from the transistor Q1, the signal is supplied to the bases of the transistors Q2 and Q3 of the control unit PB2.

As a result, when white is selected by the switch 4, the transistor Q2 changes from the on state to the off state, and when yellow is selected, the transistor Q3 changes from the off state to the on state. Accordingly, the signals supplied to the patterns 3b and 3c of the normal control unit PB2 have the opposite polarity to those supplied up to that time, so that the motor 1 rotates in the opposite direction as before, and the abnormal fog lamp It is controlled to the same color as L1.

When one of the control units becomes abnormal, the transistor Q1 of the abnormal control unit is set to H level.
A level signal is transmitted and supplied to the base of the transistor Q31 via the diode D32 or D33 of the control unit PB3 and the resistor R36. On the other hand, D30 or D31 of the control unit PB3 is sent from the control unit that has become abnormal.
Is supplied with an L-level signal, the diode D3
0 or D31 is connected to the transistor Q31 via the resistor R35.
Is supplied with an L level signal to the base of the resistor R.
Even if the left side of 35 becomes L level, the right side of resistor R35 maintains H level. Thus, when one of the control units becomes abnormal, the fog lamps L1 and L2 remain lit.

FIG. 3 is a circuit diagram showing another embodiment, in which the power of the relay RL is supplied without passing through the control unit PB2, and the operation is the same as that of FIG.

[0032]

As described above, according to the present invention, when the color of a fog lamp is changed, the fog lamp is turned off, so that no intermediate color is generated. Also, when the color of the left and right fog lamps is different due to the failure of the control unit, the color of the normally operating fog lamp is adjusted to the color of the abnormal fog lamp. Is not fixed to a different color, and the sense of distance is not disturbed, so that there is an effect that safe driving can be performed.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing one embodiment of the present invention.

FIG. 2 is a circuit diagram showing another embodiment.

FIG. 3 is a circuit diagram showing another embodiment.

FIG. 4 is a circuit diagram showing an example of the related art.

FIG. 5 is a diagram for explaining the operation of the motor driver in FIG. 4;

FIG. 6 is a perspective view of a lamp portion for explaining a color changing mechanism.

[Explanation of symbols]

1 ... motor, 3, 4 ... switch, C3 ~ C8, C30 ~
34: condenser, D2 to D7, D30 to D35: diode, L: fog lamp, MD: motor driver, Q
1 to Q3, Q30 to 32 ... transistors, R1 to R1
2, R30-41: resistance, RL (rl): relay, PB
1 to PB3: control unit, PS: posistor, U: flip-flop, V: power supply unit.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-149701 (JP, A) JP-A-7-141902 (JP, A) JP-A-7-186830 (JP, A) JP-A-7-186 186829 (JP, A) Japanese Utility Model Hei 3-110701 (JP, U) Japanese Utility Model Utility Model 3-75046 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21S 8/10 B60Q 1 / 20 F21S 10/02 F21V 9/08

Claims (3)

(57) [Claims] 1. A lamp color variable for individually controlling colors of light generated from two lamps by moving a moving means provided for each lamp to a position determined by a color selection switch when a control signal is supplied. In the lamp control circuit, a driving unit provided for each lamp and driving the moving unit until the moving unit reaches a position determined by the color selection switch; A moving position control circuit having a control signal sending period regulating means for sending a control signal supplied to the driving means until reaching the stop position; and a power supply for supplying power to the lamp during a period when the control signal is supplied to the driving means. When one of the moving position control circuits is in a state of continuously transmitting a control signal, the lamp is forcibly turned on and the other is moved. The control circuit of the lighting color variable lamp characterized by comprising a control signal generated by the position control circuit and a lamp control circuit for controlling such that the polarity opposite to the polarity specified by the color selection switch. 2. A moving position control circuit according to claim 1, wherein the moving position control circuit continuously sends out a control signal when the moving means does not move to a position designated by the color selection switch even after a predetermined time has elapsed. Control circuit for variable lamp color. 3. The moving means according to claim 2, wherein the moving means has a colored glove, and when a control signal is continuously transmitted due to an abnormality of one of the moving means, the other moving means is moved to the moving position of the one moving means. A control circuit for a variable lamp color, characterized in that it is controlled so as to match the color.