JP6499870B2 - Car interior lighting system - Google Patents

Description

  The present invention relates to a vehicle interior lighting device that illuminates a vehicle interior.

  Conventionally, there are turn signal lamps and tail lamps as illumination lamps used in vehicles. These illumination lamps are not lit at the same time for visual recognition. However, the blinker lamp is lit at the same time only during a hazard. In addition, since the blinker lamp and the tail lamp emit monochromatic light, even if there is a slight difference in luminance between the left and right, there was no fine adjustment unless you were concerned about it.

  On the other hand, when light sources such as LEDs that illuminate the interior of the vehicle are arranged symmetrically, depending on the amount of current that drives the light source, a difference in brightness or a change in color occurs between them. There was a need to adjust.

  The following are known as this type of lighting device. For example, in a multi-color light source device, monochromatic light emitted from a monochromatic light emitting diode using a mass-produced product with extremely small luminance variation between individuals is R (red), G (green), and B (blue) by each color converter. ) To light. Furthermore, this apparatus adjusts the luminance balance of R, G, and B light with a controller according to the duty ratio of the pulse signal applied to the monochromatic light emitting diode, and obtains light of a desired emission color (see Patent Document 1).

  In addition, the illumination for the vehicle installed on the ceiling between the driver's seat and the passenger seat of the vehicle has light emitting diodes (LEDs) of three colors of R, G and B, and when the outside air temperature is high, When the outside air temperature is low, the color tone is changed to a warm color system (see Patent Document 2).

  Moreover, the visible light beam irradiation apparatus arrange | positioned in a vehicle interior irradiates a visible light beam, displays information in a vehicle interior, and provides a user with information (refer patent document 3).

  As described above, each LED arranged in the vehicle interior emits light with a luminance according to the color, and the vehicle interior is illuminated with color light.

Japanese Patent Laid-Open No. 2014-223843 JP 2009-90929 A JP 2008-195375 A

  However, when aligning the luminance of a pair of light sources arranged symmetrically in the passenger compartment, even if a light source such as a monochromatic light emitting diode with extremely small variation in luminance between individuals is used, a driving unit that drives each LED, for example, an FET Due to variations in switch elements and the like, the brightness of the LEDs may differ, and the illuminance of the light that illuminates the interior of the vehicle may vary.

  Further, in the case of color light sources arranged symmetrically in the passenger compartment, if there is a difference in the brightness of the color light emitted from each color light source, the passenger will notice a difference in illuminance caused by this. In particular, in the effect of illuminating at a low illuminance according to the atmosphere, even if there is a slight illuminance shift, the color change is easily perceived when it is dim, and the hospitality effect for the passenger is impaired. For this reason, it has been desired that a difference in luminance due to each color light source disposed symmetrically in the passenger compartment is not perceived as a color change by the passenger.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a vehicle interior lighting device that can prevent a passenger from perceiving a difference in luminance between light sources arranged symmetrically in a vehicle interior. There is to do.

In order to achieve the above-described object, the vehicle interior lighting device according to the present invention is characterized by the following (1) to ( 3 ).
(1) A vehicle interior illumination device that illuminates a vehicle interior, wherein a plurality of light source units emit illumination light into the vehicle interior and are arranged in pairs in at least one of the front-rear direction and the left-right direction of the vehicle interior; A plurality of light sources connected in parallel, and a common driving unit that drives the plurality of light sources with the same amount of current , and the two light sources paired in one of the front-rear direction and the left-right direction Are arranged in a plurality of pairs along the other in the front-rear direction and the left-right direction, and each light source unit is composed of a plurality of color light source units that respectively emit red, blue, and green light as the illumination light. The common driving unit is provided for each pair of the plurality of light source units and for each color of the illumination light, and each of the common driving units is a corresponding pair of the two light source units. Two of the corresponding colors connected in parallel Driving the color light source unit with the same amount of current .
According to the vehicle interior lighting device having the above configuration (1), the plurality of light source units arranged in pairs in the vehicle interior are driven by the common drive unit with the same amount of current. In this direction, there is no difference in luminance. Thereby, the space in the vehicle interior in the pairing direction can be illuminated uniformly, and the difference in luminance between the light source units arranged in pairs in the vehicle interior can be prevented from being perceived by the passenger.
Furthermore, since the plurality of color light source units arranged in pairs in the passenger compartment are driven by the same drive unit with the same amount of current, the color change caused by color illumination occurs in the direction of the pair of passenger compartments. Disappear. Thereby, it can prevent that the passenger | crew perceives the color change of the light source part arrange | positioned symmetrically in a vehicle interior.

( 2 ) The vehicle interior lighting device having the configuration of (1), wherein the two light source portions that are paired are arranged symmetrically in at least one of the front-rear direction and the left-right direction of the vehicle interior.
According to the vehicle interior lighting device having the configuration ( 2 ), it is possible to uniformly illuminate the space in the vehicle interior in at least one of the front-rear direction and the left-right direction.

( 3 ) The vehicle interior illumination device having the configuration of (1) or (2) , wherein each of the common driving units illuminates the vehicle interior with lower illuminance than usual. Driving part .
According to the vehicle interior lighting device having the above configuration ( 3 ), when illumination is performed at low illuminance, it becomes easy to notice a difference in luminance and a change in color, but a difference in luminance and a change in color are eliminated. Can receive hospitality with lighting that matches the mood.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the difference in the brightness | luminance of the light source part arrange | positioned symmetrically in a vehicle interior is perceived by the passenger.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a block diagram illustrating a circuit configuration of a vehicle interior lighting device according to an embodiment. FIG. 2A is a diagram showing the arrangement of the connector with control function, illumination, and harness when viewed from obliquely above the rear of the vehicle interior, and FIG. 2B is mounted with a vehicle interior illumination device. It is the figure which looked at the vehicle interior of the vehicle from the upper part. FIG. 3 is a circuit diagram showing the connection between the illumination arranged symmetrically in the left-right direction in the vehicle interior and the output unit in the illumination ECU. FIG. 4 is a circuit diagram showing the connection between the illuminations arranged symmetrically in the left-right direction and the front-rear direction in the vehicle interior in Modification 1 and the output unit in the illumination ECU. FIG. 5 is a view of a vehicle interior of a vehicle on which the vehicle interior lighting device in Modification 2 is mounted as viewed from above. FIG. 6 is a circuit diagram showing the connection between the illumination arranged symmetrically in the front-rear direction in the vehicle interior and the output unit in the illumination ECU in the second modification.

  Hereinafter, the vehicle interior lighting device according to the present embodiment will be described with reference to the drawings. The vehicle interior lighting device of the present embodiment illuminates the vehicle interior in the effect state. The effect state is a state in which illumination is performed with color light with low illuminance that matches the atmosphere.

  FIG. 1 is a block diagram showing a circuit configuration of a vehicle interior lighting device 5 according to the embodiment. The vehicle interior lighting device 5 includes a connector 10 with a control function connected to an end portion of a wire harness (main line) 6 (see FIG. 2) forming an in-vehicle network (for example, CAN), and a load on the connector 10 with a control function as a load. It consists mainly of four illuminations 31, 33, 41, 43 to be connected, a main ECU (electronic control unit) 14 connected to the wire harness 6, and a meter ECU 15. A meter panel 70 and an effect state switch (SW) 63 are connected to the meter ECU 15.

  The control function-equipped connector 10 includes an illumination ECU 20 and a connector 8A. The connector 8A is connected to the other connector 8B connected to the wire harness 6. The illumination ECU 20 is communicably connected to the main ECU 14 and the meter ECU 15 via connectors 8A and 8B.

  The illumination ECU 20 is a device that is activated by an ON signal sent from the main ECU and controls a load such as an illumination lamp, and includes a control unit 21, a communication unit 23, an input unit 25, an output unit 24, and a power supply unit 22.

  The control unit 21 incorporates a well-known CPU 21z, ROM, and the like, and controls the operation of each unit of the vehicle interior lighting device 5. The communication unit 23 is connected to the connector 8A and can communicate with various devices such as the main ECU 14 and the meter ECU 15 connected to the in-vehicle network. The input unit 25 turns on a signal from an illuminance sensor that detects ambient brightness, an on / off signal of a personal switch (not shown) for switching on / off of a personal lamp (not shown), and a rear room lamp. Alternatively, a rear room switch on / off signal to be switched off is input.

  The output unit 24 outputs a signal for dimming the illuminations 31, 33, 41, and 43. In the present embodiment, dimming of the illuminations 31, 33, 41, and 43 is performed by PWM (Pulse Width Modulation) control. The power supply unit 22 inputs battery voltage via the connectors 8A and 8B and supplies power to each unit in the illumination ECU 20.

  Illuminations (decorative lights) 31, 33, 41, 43 are installed on the ceiling of the passenger compartment 4 so as to be arranged symmetrically in the left-right direction and the front-rear direction in the passenger compartment 4. The illuminations 31, 33, 41, 43 are mainly used as indirect lighting, and the lighting color and brightness of the illumination light are changed in accordance with the atmosphere in the passenger compartment in the production state, so that the passenger (passenger) can be illuminated. Doing hospitality. The illumination 31 includes a red LED 31r, a green LED 31g, and a blue LED 31b (color light source unit), and can illuminate with one million or more colors by adjusting the respective light amounts. Similarly, the illuminations 33, 41, and 43 also have red LEDs 33r, 41r, and 43r, green LEDs 33g, 41g, and 43g, and blue LEDs 33b, 41b, and 43b, respectively. It can be illuminated with more than 10,000 colors. Note that light emitting elements such as an organic EL or a liquid crystal display (LCD), an incandescent lamp, or the like may be used instead of the LEDs (light emitting diodes) of RGB colors.

  The connector 8B is connected to a main ECU 14 and a meter ECU 15 that collectively manage various ECUs arranged in each part of the vehicle interior. Meter ECU15 controls the display of the meter panel 70 installed in the instrument panel 18, and inputs the switch state of effect state SW63. The effect state SW63 is arranged on the instrument panel 18 and is turned on / off by the driver. When the effect state SW63 is operated to be turned on, the effect state is set, and when the effect state SW63 is operated to be turned off, the normal mode is set. As described above, the production state is illuminated with color light that matches the atmosphere in the passenger compartment 4, and the illuminations 31, 33, 41, and 43 have lower illuminance (for example, 20% brightness) than in the normal mode. It is a state to drive. Further, a plurality of colors of the color light illuminated in the effect state can be set. For example, the color can be switched by repeatedly pressing the effect state SW63. The effect set in the effect state SW63 is transmitted by the meter ECU 15 to the communication unit 23 in the illumination ECU 20 via the connectors 8A and 8B.

  FIG. 2A is a diagram showing the arrangement of the connector 10 with control function, the illuminations 31, 33, 41, 43, and the harness 51 when viewed from the diagonally upper rear side in the passenger compartment 4. As shown in FIG. FIG. 2B is a view of the interior of the vehicle compartment 4 of the vehicle 1 on which the vehicle interior lighting device 5 is mounted as viewed from above. The vehicle 1 is a one-box car for seven persons with seats provided in three rows. The passenger compartment 4 is a uniform space where the front passenger compartment on the driver's seat 3 side is not shielded from the rear passenger compartment on the passenger (passenger) side. Illuminations 31, 33, 41, and 43 for illuminating the vehicle interior 4 with indirect illumination are respectively installed on the center and rear ceiling in the vehicle interior 4.

  Among these four illuminations 31, 33, 41, 43, the illumination 31 and the illumination 33 are arranged symmetrically in the left-right direction of the passenger compartment 4, and a harness 51 is branched from the wire harness 6 laid in the center in the left-right direction. Are at equal distances. The same applies to the illumination 41 and the illumination 43. The illumination 31 and the illumination 41 are arranged symmetrically in the front-rear direction of the passenger compartment 4. The same applies to the illumination 33 and the illumination 43. These four illuminations 31, 33, 41, 43 are simultaneously turned on in the production state, and the space of the passenger compartment 4 can be illuminated uniformly. For the red LED, green LED, and blue LED incorporated in the illuminations 31, 33, 41, 43, mass-produced products having relatively uniform emission characteristics are used.

  FIG. 3 is a circuit diagram showing the connection between the illuminations 31, 33, 41, 43 arranged symmetrically in the left-right direction in the passenger compartment 4 and the output unit 24 in the illumination ECU 20. The output unit 24 includes FETs 53, 54, 55, 56, 57, and 58 for six channels. The anode terminal of the red LED 31 r in the illumination 31 is connected to the battery via the resistor R 1, and its cathode terminal is connected to the drain terminal of the FET 53. The anode terminal of the red LED 33 r in the illumination 33 is connected to the battery via the resistor R 4, and the cathode terminal is connected to the drain terminal of the FET 53. The source terminal of the FET 53 is grounded, and its gate terminal is connected to the output port P1 of the CPU 21z. The resistors R1 and R4 are made to have the same resistance value.

  The CPU 21z outputs a pulse signal for driving the red LED 31r and the red LED 33r to the gate terminal of the FET 53 (common drive unit) via the output port P1, so that the FET 53 is connected in parallel to the drain terminal. The red LED 31r and the red LED 33r thus driven are driven with the same amount of current according to the pulse width, and the red LED 31r and the red LED 33r are lit by the amount of light corresponding to the pulse width.

  For the pulse width modulation, a pulse signal with a frequency of, for example, 200 Hz is used, and can be varied within a range of a duty ratio of 0% to 100%. When performing pulse width modulation, the CPU 21z selects desired color data from color data registered in advance and reads the duty values of the R, G, and B colors, thereby adjusting the light quantity of the LED.

  Similarly, the anode terminal of the blue LED 31b in the illumination 31 is connected to the battery via the resistor R2, and the cathode terminal thereof is connected to the drain terminal of the FET. Further, the anode terminal of the blue LED 33b in the illumination 33 is connected to the battery via the resistor R5, and the cathode terminal thereof is connected to the drain terminal of the FET. The source terminal of the FET 54 is grounded, and its gate terminal is connected to the output port P2 of the CPU 21z. Resistor R2 and resistor R5 are arranged to have the same resistance value. The CPU 21z outputs a pulse signal for driving the blue LED 31b and the blue LED 33b to the gate terminal of the FET 54 via the output port P2, so that the FET 54 has a blue LED 31b connected in parallel to its drain terminal and The blue LED 33b is driven with the same amount of current according to the pulse width, and the blue LED 31b and the blue LED 33b are turned on with the amount of light according to the pulse width.

  Similarly, the anode terminal of the green LED 31g in the illumination 31 is connected to the battery via the resistor R3, and the cathode terminal thereof is connected to the drain terminal of the FET 55. The anode terminal of the green LED 33g in the illumination 33 is connected to the battery via the resistor R6, and its cathode terminal is connected to the drain terminal of the FET 55. The source terminal of the FET 55 is grounded, and its gate terminal is connected to the output port P2 of the CPU 21z. Resistor R3 and resistor R6 are set to the same resistance value. The CPU 21z outputs a pulse signal for driving the green LED 31g and the green LED 33g to the gate terminal of the FET 55 via the output port P2, so that the FET 55 has a green LED 31g connected in parallel to its drain terminal and The green LED 33g is driven with the same amount of current according to the pulse width, and the green LED 31g and the green LED 33g are turned on with the amount of light according to the pulse width.

  Further, the output unit 24 is similarly driven for the red LED 41r, the blue LED 41b, and the green LED 41g in the illumination 41, and the red LED 43r, the blue LED 43b, and the green LED 43g in the illumination 43.

  In the vehicle interior lighting device 5, the red LED 31 r, the blue LED 31 b, the green LED 31 g in the illumination 31, the red LED 33 r in the illumination 33, and the blue LED 33 b are arranged symmetrically in the left-right direction in the vehicle interior 4. The green LED 33g is driven with the same amount of current by the FETs 53, 54, and 55 in the output unit 24, respectively. Thereby, in the left-right direction of the compartment 4, the color change by color illumination is eliminated. Similarly, the illumination 41 and the illumination 43 arranged symmetrically in the passenger compartment 4 are also driven with the same amount of current by the FETs 56, 57, and 58 in the output unit 24, so that color illumination is performed with the same color. Thereby, the space in the compartment 4 in the left-right direction can be illuminated uniformly.

  Thus, since the color change of the color illumination light due to the illuminations 31, 33, 41, 43 in the left-right direction of the passenger compartment 4 is eliminated, it is possible to prevent the passenger from perceiving the color change due to the color illumination light. In particular, in the production state where color illumination is performed at low illuminance, it is easy to notice the difference in color, but even in the production state, the color change is not understood, and the passenger can use color illumination that matches the mood. You can receive hospitality.

(Modification 1)
In the above embodiment, the case where the illumination arranged symmetrically in the left-right direction in the vehicle interior is driven with the same amount of current is shown, but in Modification 1, the illumination is arranged symmetrically in the front-rear direction as well as in the left-right direction. The case where the illumination is driven with the same amount of current is shown.

  The arrangement of the four illuminations 31, 33, 41, and 43 is as shown in FIGS. 2A and 2B described above. That is, the illumination 31 and the illumination 33 are arranged symmetrically in the left-right direction of the passenger compartment 4. The same applies to the illumination 41 and the illumination 43. The illumination 31 and the illumination 41 are arranged symmetrically in the front-rear direction of the passenger compartment 4. The same applies to the illumination 31 and the illumination 43.

  FIG. 4 is a circuit diagram showing the connection between the illuminations 31, 33, 41, 43 arranged symmetrically in the left-right direction and the front-rear direction in the passenger compartment 4 in Modification 1 and the output unit 24 in the illumination ECU 20. In the vehicle interior lighting device 5A of the first modification, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. Further, the FETs 53, 54, and 55 have specifications of the maximum current amount that can supply the same current amount to the four LEDs that are driven. In the first modification, the FETs 56, 57, and 58 are not used.

  In the vehicle interior lighting device 5 </ b> A of the first modification, the drain terminal of the FET 53 includes the anode terminal of the red LED 31 r in the illumination 31, the anode terminal of the red LED 33 r in the illumination 33, and the anode terminal of the red LED 41 r in the illumination 41. The anode terminals of the red LEDs 43r in the illumination 43 are connected in parallel. Note that the resistors R1, R4, R7, and R10 have the same resistance value.

  The CPU 21z outputs a pulse signal for driving the red LED 31r, the red LED 33r, the red LED 41r, and the red LED 43r to the gate terminal of the FET 53 via the output port P1, so that the FET 53 is parallel to the drain terminal. The red LED 31r, the red LED 33r, the red LED 41r, and the red LED 43r connected to each other are driven with the same amount of current according to the pulse width, and the red LED 31r, the red LED 33r, The red LED 41r and the red LED 43r are lit.

  Further, the drain terminal of the FET 54 includes an anode terminal of the blue LED 31 b in the illumination 31, an anode terminal of the blue LED 33 b in the illumination 33, an anode terminal of the blue LED 41 b in the illumination 41, and a blue LED 43 b in the illumination 43. Anode terminals are connected in parallel. Note that the resistors R2, R5, R8, and R11 have the same resistance value. Similarly, the blue LED 31b, the blue LED 33b, the blue LED 41b, and the blue LED 43b are driven by the FET 54 and light up.

  The drain terminal of the FET 55 includes an anode terminal of the green LED 31 g in the illumination 31, an anode terminal of the green LED 33 g in the illumination 33, an anode terminal of the green LED 41 g in the illumination 41, and a green LED 43 g in the illumination 43. Anode terminals are connected in parallel. Note that the resistors R3, R6, R9, and R12 have the same resistance value. Similarly, the green LED 31g, the green LED 33g, the green LED 41g, and the green LED 43g are driven by the FET 55 and light up.

  In this vehicle interior lighting device 5A, the illuminations 31, 33, 41, 43 arranged symmetrically in the left-right direction in the vehicle interior 4 are driven with the same amount of current, so that color illumination is performed with the same color. Thereby, the color change due to the color illumination is eliminated not only in the left-right direction in the passenger compartment 4 but also in the space in the front-rear direction. Thereby, the space in the compartment 4 can be illuminated uniformly uniformly.

  Thus, since the color change of the color illumination light due to the illuminations 31, 33, 41, 43 in the left-right direction and the front-rear direction of the passenger compartment 4 is eliminated, the color change due to the color illumination light is perceived by the passenger. Can be prevented. In particular, in a production state where color illumination is performed at low illuminance, it is generally easy to notice a change in color. However, in this embodiment, the color change is not known even in the production state, and the occupant has an atmosphere. You can receive hospitality with color lighting that suits your needs.

(Modification 2)
Modification 2 shows a case where illuminations that are arranged symmetrically in the front-rear direction of the vehicle interior and asymmetrically arranged in the left-right direction are driven.

  FIG. 5 is a view of the interior of the vehicle 1 in which the interior lighting device 5B according to the second modification is mounted as viewed from above. In the vehicle interior lighting device 5B of the second modification, the same reference numerals are used for the same components as those in the above embodiment, and the description thereof is omitted.

  Of the four illuminations 31A, 33, 41A, 43, the illumination 31A and the illumination 33 are arranged asymmetrically in the left-right direction of the passenger compartment 4, and the harness 51 that branches from the wire harness 6 laid in the center in the left-right direction. The length is shorter on the left side than on the right side, and the illumination 31A is close to the center. The same applies to the illumination 41A and the illumination 43. The illumination 31 </ b> A and the illumination 41 </ b> A are arranged symmetrically in the front-rear direction of the passenger compartment 4. The same applies to the illumination 33 and the illumination 43. These four illuminations 31 </ b> A, 33, 41 </ b> A, 43 are turned on simultaneously in the production state, and the space of the passenger compartment 4 can be illuminated as a whole.

  FIG. 6 is a circuit diagram showing the connection between the illuminations 31A, 33, 41A, 43 arranged symmetrically in the front-rear direction in the passenger compartment 4 and the output unit 24 in the illumination ECU 20 in the second modification. In the vehicle interior lighting device 5B of Modification 2, the anode terminal of the red LED 31r in the illumination 31A and the anode terminal of the red LED 41r in the illumination 41A are connected in parallel to the drain terminal of the FET 53. Note that the resistors R1 and R7 are arranged to have the same resistance value.

  The CPU 21z outputs a pulse signal for driving the red LED 31r and the red LED 41r to the gate terminal of the FET 53 via the output port P1, so that the FET 53 has the red LED 31r and the red LED 31r connected in parallel to the drain terminal. The red LED 41r is driven with the same amount of current according to the pulse width, and the red LED 31r and the red LED 41r are lit by the amount of light corresponding to the pulse width.

  Further, the anode terminal of the blue LED 31b in the illumination 31A and the anode terminal of the blue LED 41b in the illumination 41A are connected in parallel to the drain terminal of the FET 54. Note that the resistors R2 and R8 are equal in resistance value. Similarly, the blue LED 31b and the blue LED 41b are driven by the FET 54 with the same amount of current according to the pulse width, and light up.

  Further, the anode terminal of the green LED 31g in the illumination 31A and the anode terminal of the green LED 41g in the illumination 41A are connected in parallel to the drain terminal of the FET 55. Note that the resistors R3 and R9 are equal in resistance value. Similarly, the green LED 31g and the green LED 41g are driven by the FET 55 with the same amount of current according to the pulse width, and light up.

  Further, the output unit 24 is similarly driven for the red LED 33r, the blue LED 33b, and the green LED 33g in the illumination 33, and the red LED 43r, the blue LED 43b, and the green LED 43g in the illumination 43.

  In this vehicle interior lighting device 5B, the illumination 31A and the illumination 41A arranged symmetrically in the front-rear direction in the vehicle interior 4 are driven with the same amount of current, so that color illumination is performed with the same color. Similarly, the illumination 33 and the illumination 43 arranged symmetrically in the front-rear direction in the passenger compartment 4 are also driven with the same amount of current, so that color illumination is performed with the same color. Thereby, in the front-back direction of the compartment 4, the color change by color illumination is eliminated.

  However, in this case, since the illumination 31A and the illumination 33 arranged asymmetrically in the left-right direction are driven by different current amounts by different FETs, the color light illuminated by the illumination 31A and the illumination 33 changes in color. Since it may occur, fine adjustment is necessary. The same applies to the illumination 41A and the illumination 43.

  Thus, since the color change of the color illumination light by the illumination 31A and the illumination 41A arranged in the front-rear direction of the passenger compartment 4 is eliminated, the color change due to the color illumination light is perceived by the passenger in the front-rear direction. Can be prevented.

  The technical scope of the present invention is not limited to the embodiment described above. The above-described embodiments can be accompanied by various modifications and improvements within the technical scope of the present invention.

  For example, in the above-described embodiment, an LED (light emitting diode) is used as a color light source that emits light of each color of RGB. May be used.

  In the above embodiment, the LED is driven using a field effect transistor (FET) which is a unipolar transistor. However, the LED may be driven using a current amplification type bipolar transistor. Further, when lighting control is performed, the LED may be driven by PFM control (pulse frequency modulation) instead of PWM control.

  Moreover, although the case where it applied to illumination as an illumination lamp was shown in the said embodiment, you may apply not only to this but to the personal lamp which illuminates front, back, left, and right seats respectively in the production state.

Here, the features of the above-described embodiments of the vehicle interior lighting device according to the present invention are summarized and listed in the following [1] to [4], respectively.
[1] A vehicle interior lighting device (5) for illuminating the vehicle interior,
A plurality of light source units (LEDs 31b, 33b, 41b, 43b, 31g, 33g, 41g, 43g, which emit illumination light into the vehicle interior and are arranged in pairs in at least one of the front-rear direction and the left-right direction of the vehicle interior, 31r, 33r, 41r, 43r),
A plurality of light source units connected in parallel, and a common drive unit (FETs 53 to 58) for driving the plurality of light source units with the same amount of current;
Comprising
A vehicle interior lighting device.
[2] The light source unit includes a plurality of color light source units that emit red, blue, and green light as the illumination light,
The common drive unit drives each of the color light source units that form a pair with the same amount of current with respect to the plurality of light source units.
The vehicle interior lighting device according to [1] above, wherein
[3] The plurality of paired light source units are arranged symmetrically in at least one of the front-rear direction and the left-right direction of the vehicle interior.
The vehicle interior lighting device according to [1] or [2] above, wherein
[4] The driving unit drives the plurality of light sources so as to illuminate the vehicle interior with lower illuminance than usual.
The vehicle interior lighting device according to any one of [1] to [3] above.

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Driver's seat 4 Car interior 5, 5A, 5B Car interior lighting device 6 Wire harness 8A, 8B Connector 10 Connector with control function 14 Main ECU
15 Meter ECU
18 Instrument panel 20 Illumination ECU
21 control unit 21z CPU
22 Power supply unit 23 Communication unit 24 Output unit 25 Input unit 31, 31A, 33, 41, 41A, 43 Illumination 31b, 33b, 41b, 43b Blue LED
31g, 33g, 41g, 43g Green LED
31r, 33r, 41r, 43r Red LED
51 Harness 53, 54, 55, 56, 57, 58 FET
63 Production state SW
70 Meter panel

Claims (3)

A vehicle interior lighting device for illuminating a vehicle interior,
A plurality of light source units that emit illumination light into the vehicle interior and are arranged in pairs in at least one of the front-rear direction and the left-right direction of the vehicle interior;
A plurality of light source units connected in parallel, and driving the plurality of light source units with the same amount of current; and
Equipped with a,
The two light source sections that are paired in one of the front-rear direction and the left-right direction are arranged so that a plurality of pairs are arranged along the other of the front-rear direction and the left-right direction
Each of the light source units includes a plurality of color light source units that emit red, blue, and green light as the illumination light, respectively.
The common driving unit is provided for each pair of the plurality of pairs of light source units and for each color of the illumination light,
Each of the common driving units drives the two color light source units of the corresponding colors connected in parallel included in the corresponding two light source units with the same amount of current.
A vehicle interior lighting device. The pair of two light source portions are disposed symmetrically in at least one of the front-rear direction and the left-right direction of the vehicle interior,
Vehicle interior lighting device according to claim 1, characterized in that. Each of the common driving units drives the plurality of light source units so as to illuminate the vehicle interior with lower illuminance than usual.
The vehicle interior lighting device according to claim 1 or 2 .

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