JP2008081053A - Cabin interior lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cabin interior lighting system capable of controlling to obtain desirable lighting without a touch to a switch for operation. <P>SOLUTION: An infrared-ray camera 10 photographs the face of a driver 60, and determines direction of the driver's gaze. When the driver's gaze exists in the lighting range of at least one lighting device of a group of lighting device (a lighting device 40a - a lighting device 40d), the corresponding lighting device is lighted. When each lighting device has directivity, angle of irradiation of the lighting device is controlled for lighting in response to the direction of the driver's gaze. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lighting device in a vehicle interior.

  As a switch for operating an in-vehicle device, an operation switch for operating the in-vehicle device by touching it directly is known. However, such an operation has low operability and is not suitable for an operation while traveling.

There is also known a non-contact switch that can operate an in-vehicle device without touching it directly. For example, there is a non-contact switch provided on a ceiling part of a passenger compartment so that a driver can operate an in-vehicle device by holding his hand near the ceiling part (see, for example, Patent Document 1).
JP 2005-297637 A

  In the vehicle operating device disclosed in Patent Document 1, the driver needs to select an in-vehicle device to be operated in advance before operating the in-vehicle device. Therefore, it is difficult to appropriately turn on / off the necessary ones of the plurality of lighting devices in the passenger compartment.

  Although it is conceivable to select all the lighting devices in the passenger compartment, all the lighting devices are turned on / off at the same time, and the visibility of the driver while traveling is lowered.

  The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to control a desired illumination unit in a non-contact manner without performing a manual switch operation.

  Another object of the present invention is to make it possible to easily control the illumination in the passenger compartment in a non-contact manner without impairing the visibility.

In order to achieve the above object, a vehicle interior lighting device of the present invention includes:
An imaging means provided in the vehicle for imaging a space including a driver's face;
Gaze direction detection means for detecting a direction in which the driver of the vehicle gazes based on an image captured by the imaging means;
A plurality of illumination means arranged at different positions in the vehicle interior of the vehicle and illuminating a part of the vehicle interior;
Illumination control means for controlling the plurality of illumination means based on the direction of the driver's gaze detected by the gaze direction detection means;
It is characterized by providing.

  The gaze direction detection unit may determine a gaze direction based on the driver's face direction, gaze direction, and the like based on the image acquired by the imaging unit.

  Further, the gaze direction detecting means is set with a table for determining the direction in which the driver is gazing from the left and right direction and the vertical direction of the driver's face and the horizontal direction and the vertical direction of the line of sight. The direction in which the driver is gazing may be determined based on the table.

  The illumination control means may select and light at least one of the plurality of illumination means.

The plurality of illumination means includes illumination angle adjustment means for adjusting an illumination angle of illumination,
The illumination control unit may control an illumination angle of directional illumination by controlling the illumination angle adjusting unit.

  The lighting control means, for example, a determination means for determining whether the vehicle is stopped or traveling, and when the driver continuously watches in a certain direction when the determination means determines that the vehicle is stopped, Illuminates while gazing at the illumination means located in the gaze direction. When the driver continues to gaze in a certain direction when it is determined that the vehicle is traveling, the illumination means located in the gaze direction is lit for a certain period of time. It is also possible to provide lighting control means for turning off the light after being turned on.

  According to the present invention, a desired illumination unit can be controlled by a simple operation without contact.

  Hereinafter, a vehicle interior lighting device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing the overall configuration of the vehicle interior lighting device according to the present embodiment. FIG. 2 is a schematic diagram showing a state in which the vehicle interior lighting device according to the present embodiment is installed in a vehicle.

  As shown in FIG. 1, a vehicle 100 including a vehicle interior lighting device according to the present embodiment includes an infrared camera 10, an infrared lighting 20, a vehicle speed sensor 30, a lighting device group 40, a control device (hereinafter referred to as an ECU (hereinafter referred to as “ECU”)). 50) referred to as “Electric Control Unit”.

  As shown in FIG. 2, the infrared camera 10 is installed on the dashboard or in the vicinity of the steering wheel, and visualizes and captures infrared rays generated from the driver 60. In order to determine the gaze direction from the captured image, the ECU 50 is connected.

  The infrared illumination 20 is a device that is installed near the infrared camera 10 and emits infrared rays. By illuminating the area of the face of the driver 60, the infrared camera 10 can capture images even at night when the amount of infrared light is insufficient. .

  The vehicle speed sensor 30 is a sensor that detects the vehicle speed of the vehicle 100 on which the driver 60 is riding, and is connected to the ECU 50.

  The illuminating device group 40 includes an illuminating device 40a, an illuminating device 40b, an illuminating device 40c, and an illuminating device 40d, and each illuminating device includes each part of the vehicle 100 (for example, a driver seat side lower part, a passenger seat lower part, It is installed on the dashboard and behind the ceiling of the passenger compartment.

  As shown in FIG. 2, the lighting device 40a is installed below the driver's seat side to illuminate the lower part of the driver's seat. The illuminating device 40b is installed on the lower side of the passenger seat in order to illuminate the leg portion on the passenger seat side. The lighting device 40c is installed near the dashboard to illuminate the vicinity of the dashboard. The illuminating device 40d is installed behind the vehicle interior ceiling to illuminate the upper part of the rear seat.

  The ECU 50 processes the face image acquired by the infrared camera 10 to detect the face direction and line-of-sight direction of the driver 60, and determines the gaze direction of the driver 60 based on the detected face direction and line-of-sight direction. Thus, the optimum lighting device is selected from the lighting device group 40 and turned on.

  The ECU 50 includes an image memory 51, a ROM (Read Only Memory) 52, a RAM (Random Access Memory) 53, and a CPU (Central Processing Unit) 54.

  The image memory 51 stores image data captured by the infrared camera 10.

  The ROM 52 stores a program for controlling the operation of the CPU 54. In addition, the ROM 52 stores a gaze direction table for determining the gaze direction from the face direction and the line-of-sight direction of the driver 60, and a set value of the illumination time during vehicle travel. Here, the set value can be set in consideration of the processing interval of the gaze direction determination process.

  The gaze direction table stores reference data for determining the direction in which the driver 60 is gazing from the horizontal and vertical directions of the face of the driver 60 and the horizontal and vertical directions of the line of sight. Specifically, as illustrated in FIG. 10, the gaze direction table includes a horizontal direction of the face, a vertical direction of the face, a horizontal direction of the line of sight, and a vertical direction of the line of sight. From this combination, data for specifying the direction in which the driver 60 is gazing is stored. This data is configured based on, for example, data measured by experiments or the like.

  In the gaze table, as shown in FIG. 8 (a), the sign and the angle indicating the vertical direction are the angles formed with the horizontal line, with the horizontal direction being-(negative) and the upward direction being + (positive). Represents. Further, as shown in FIG. 8B, the sign and angle indicating the left-right direction indicate an angle formed with the front direction, with the right direction being + (positive) and the left direction being − (negative) with respect to the front direction. .

  The RAM 53 functions as a work area for the CPU 54. Further, in the RAM 53, a gaze direction flag indicating the current gaze direction of the driver 60, a front gaze direction flag indicating the gaze direction at the previous gaze direction determination, and the gaze direction at the same time as the last gaze direction determination And a counter that is incremented by one and cleared when they are different.

  The CPU 54 executes a program stored in the ROM 52 to process the face image acquired by the infrared camera 10 to detect the face direction and line-of-sight direction of the driver 60, and to detect the detected line-of-sight direction and face direction. This is a device that determines the gaze direction of the driver 60 based on the direction, selects an optimal lighting device from the lighting device group 40, and lights it.

  Next, operation | movement of a vehicle interior lighting apparatus provided with the said structure is demonstrated. When the vehicle 100 is powered on, the CPU 54 executes the process shown in the flowchart of FIG.

  First, the CPU 54 enters variable initialization processing to initialize each variable (step S1).

  FIG. 4 shows a flowchart of variable initialization processing (step S1).

  In the variable initialization process (step S1), the CPU 54 first clears the gaze direction flag indicating the current gaze direction of the driver 60 to “0” (step S11), and then the previous gaze direction determination. The pre-gaze direction flag indicating the gaze direction is cleared to “0” (step S12). Finally, the counter that is counted up when the gaze direction is the same as the previous gaze direction determination and cleared when it is different is set to “0”. (Step S13).

  When the variable initialization process (step S1) ends, the CPU 54 activates the infrared camera 10 in order to image the driver 60 (step S2).

  When the infrared camera 10 is activated in step S2, the CPU 54 enters a gaze direction detection process for detecting the gaze direction of the driver 60 (step S3).

  A flowchart of the gaze direction detection process (step S3) is shown in FIG.

  In the gaze direction detection process (step S3), the CPU 54 first causes the infrared camera 10 to image the driver 60 and stores the captured face image in the image memory 51 (step S31).

  Next, the face direction and line-of-sight direction of the driver 60 are detected from the face image stored in the image memory 51 (step S32).

  Although the method of detecting the face direction and the line-of-sight direction of the driver 60 is arbitrary, for example, the CPU 54 detects the face direction and the line-of-sight direction by the following method.

  First, regarding the face orientation, the CPU 54 performs a Sobel filter process on the face image stored in the image memory 51 to detect a horizontal edge (upper and lower side edges of the face) and a vertical edge (left and right side edges of the face).

  Subsequently, the center of gravity (center position) of the face is obtained from the binarized image of the face. Then, from the positional relationship of the center of gravity of the face with respect to the vertical edge and the horizontal edge, etc., as shown in FIGS. Obtained at an angle relative to the center of the head.

  Next, the line-of-sight direction will be described with reference to FIGS. 9 (a) and 9 (b).

  FIG. 9A shows an image for one frame including the face of the driver 60 imaged by the infrared camera 10. Here, 80 represents a frame of the frame, 81 represents a right region of the face image, and 82 represents a left region of the face image.

  The CPU 54 binarizes the face image as shown in FIG. 9A stored in the image memory 51 and extracts black spots, thereby selecting one eye candidate from each of the left area 82 and the right area 81 of the face image. Or obtain multiple.

  Subsequently, the left eye image and the right eye image are obtained by matching one or more eye candidates of the left region 82 and the right region 81 with the eye samples as shown in FIG. And the position coordinates of these black-eye portions are obtained. Further, the vertical and horizontal rotation angles of the left eye and the right eye are determined from the vertical and horizontal shift amounts between the obtained position coordinates of the black eye portion and the center of the eye.

  In this way, when the detection of the face direction and the line-of-sight direction is completed (step S32), the CPU 54 determines the gaze direction of the driver 60 based on the detected face direction and line-of-sight direction (step S33).

  Specifically, the CPU 54 stores in the ROM 52 the combination of the left-right direction of the face, the vertical direction of the face, the horizontal direction of the line of sight, and the vertical direction of the line of sight determined in step S32. A matching gaze direction that matches and matches the gaze direction table shown in FIG. 10 is selected.

  For example, it is detected that the face direction in the horizontal direction is −30 °, the face direction in the vertical direction is + 10 °, the direction of the line of sight in the horizontal direction is −30 °, and the direction of the line of sight in the vertical direction is −10 °. Then, this combination corresponds to the combination in the second column of the gaze direction table shown in FIG. 10, and it is determined that the gaze direction is “step on the front passenger seat”.

  Next, the CPU 54 proceeds to a gaze direction flag setting process for setting a gaze direction flag provided in the RAM 53 based on the determined gaze direction (step S34).

  In the gaze direction flag setting process (step S34), the CPU 54 first stores the gaze direction at the previous gaze direction determination in the previous gaze direction flag (step S3401).

  Next, when it is determined in step S33 of FIG. 5 that the gaze direction is the direction of the driver's seat foot (step S3402; Yes), the CPU 54 sets a gaze direction flag “1” indicating the driver seat foot direction (step S3402). Step S3406).

  When it is determined that the gaze direction is the direction of the passenger's seat foot (step S3403; Yes), the gaze direction flag “2” indicating the passenger seat foot direction is set (step S3407).

  Furthermore, when it is determined that the gaze direction is the dashboard direction (step S3404; Yes), a gaze direction flag “3” indicating the dashboard direction is set (step S3408).

Also, when it is determined that the gaze direction is the direction of the upper part of the rear seat (step S3405; Yes), a gaze direction flag “4” indicating the passenger seat foot direction is set (step S3409).
Further, when it is determined that the gaze direction is the other direction (step S3405; No), a gaze direction flag “0” indicating the other direction is set (step S3410).

  When the process of setting the flag in the gaze direction flag (steps S3402 to S3410) is completed, the CPU 54 performs a counter process (steps S3411 to S3413).

  Specifically, it is determined whether the gaze direction of the driver 60 is the same as the previous gaze direction determination, that is, whether the gaze direction flag matches the front gaze direction flag (step S3411). (S3411; Yes), the counter is incremented (step S3413). If they do not match (step S3411; No), the counter is cleared (step S3412).

  When all the gaze direction flag set processing (S34) is completed, the processing also ends the gaze direction detection processing (step 3) shown in FIG. 5, and proceeds to illumination switching processing (S4) in FIG.

  In the illumination switching process (step S4), the CPU 54 first reads vehicle speed data from the vehicle speed sensor 30 (step S401).

  Next, the CPU 54 determines whether the vehicle 100 is running or stopped from the read vehicle speed data (step S402).

  If it is determined that the vehicle is running as a result of the determination in step S402 (step S402; No), it is determined whether the value of the counter is less than the set value, that is, whether the gaze direction of the driver 60 has not changed for a certain time (step). S403).

  As a result of the determination in step S403, if it is determined that the counter value is equal to or larger than the set value (step S403; No), all the lighting devices in the lighting device group 40 are turned off (step S412).

  On the other hand, as a result of the determination in step S403, if it is determined that the counter value is less than the set value (step S403; Yes), the gaze direction flag is “1”, that is, the gaze direction is the direction below the driver's seat. Or not (step S404).

  As a result of the determination in step S404, when it is determined that the gaze direction flag is “1” (step S404; Yes), the lighting device 40a in the direction of the driver's seat foot, which is the gaze direction, is turned on, and the other lighting devices are turned off. (Step S408).

  If it is determined that the gaze direction flag is “2” (step S405; Yes), the lighting device 40b in the direction of the foot of the passenger seat that is the gaze direction is turned on, and the other lighting devices are turned off (step S409). .

  Further, when it is determined that the gaze direction flag is “3” (step S406; Yes), the lighting device 40c in the direction of the dashboard that is the gaze direction is turned on, and the other lighting devices are turned off (step S410).

  If it is determined that the gaze direction flag is “4” (step S407; Yes), the lighting device 40d in the direction of the upper part of the rear seat that is the gaze direction is turned on, and the other lighting devices are turned off (step S411). .

  Further, when it is determined that the gaze direction flag does not correspond to any of “1” to “4” (step S407; No), since there is no illumination device that lights in the gaze direction, all the illumination devices are turned off (step). S412).

  When the illumination switching process (step S4) is completed, the process returns to the gaze direction detection process (step S3).

  By repeating the processing of step S3 and step S4, the CPU 54 can light only the direction intended by the driver 60, that is, the direction in which the driver 60 is gazing.

  Next, a specific example of the operation of the lighting control apparatus having the above configuration will be described using the gaze direction table shown in FIG. 10 and the time-series data indicating the gaze direction shown in FIG.

  FIG. 11 shows time-series data in a case where the vehicle is started after confirming the upper portion of the rear seat in the vehicle stopped state, and then continuously gazing at the dashboard portion during driving.

  At time 0 to t1, the left and right of the face direction is 0 °, the top and bottom are 0 °, the gaze direction is 0 ° and the top and bottom are 0 °, and the CPU 54 finds the gaze direction of the driver 60 from the gaze direction table. Therefore, none of the lighting devices is turned on (step S412).

  From time t1 to t2, while holding the face direction up and down at 0 ° and the line of sight up and down at 0 °, the face direction left and right from 0 ° to −60 °, and the line of sight direction left and right from 0 ° to − However, during this time, the CPU 54 cannot find the gaze direction of the driver 60 from the gaze direction table, and thus none of the lighting devices is lit (step S412).

  At times t2 to t3, the left and right sides of the face are held at −60 °, up and down at 0 °, left and right in the line-of-sight direction at −60 °, and up and down at 0 °. Since no gaze direction can be found from the gaze direction table, none of the lighting devices is turned on (step S412).

  From time t3 to t5, while holding the left and right of the face direction at −60 ° and the left and right of the line of sight at −60 °, the up and down of the face direction from 0 ° to + 20 ° and the up and down of the line of sight from 0 ° It is changed to −20 °.

  In this case, at time t4, when the left and right of the face direction is −60 °, the top and bottom are + 15 °, the left and right of the line of sight is −60 °, and the top and bottom are −15 °, the CPU 54 The rear seat upper part is determined as the gaze direction, the lighting device 40d on the rear seat upper is turned on, and the other lighting devices are turned off (step S411).

  At times t5 to t6, the left and right sides of the face are held at −60 °, up and down at + 15 °, left and right in the line-of-sight direction at −60 °, and up and down at −15 °. The rear seat upper part is discriminated as the gaze direction, the lighting device 40d on the rear seat upper part is turned on, and the other lighting apparatuses are kept turned off (step S411).

  From time t6 to t9, while maintaining the vertical direction of the face at + 20 ° and the vertical direction of the line of sight at −20 °, the horizontal direction of the face is −60 ° to 0 °, and the horizontal direction of the line of sight is −60 °. From 0 ° to 0 °.

  In this case, at time t7, when the left and right of the face direction is −45 °, the top and bottom are + 20 °, the left and right of the line of sight is −45 °, and the top and bottom are −20 °, the CPU 54 determines from the gaze direction table. The dashboard unit is determined as the gaze direction, the lighting device 40c of the dashboard unit is turned on, and the other lighting devices are turned off (step S410).

  At time t8, when the face direction is -5 ° on the left and right, + 20 ° on the top and bottom, -5 ° on the left and right on the line of sight, and -20 ° on the top and bottom, the CPU 54 gazes the driver 60. Cannot be found from the gaze direction table, all the lighting devices are turned off (step S412).

  At any time from time 9 to t10, the driver 60 is stopped while holding the left and right of the face orientation at 0 °, up and down + 20 °, left and right of the line of sight 0 °, and up and down -20 °. After that, the CPU 54 receives data on running from the vehicle speed sensor 30 (step S402; No).

  Further, during this time, the CPU 54 cannot find the gaze direction of the driver 60 from the gaze direction table, and therefore any lighting device is not turned on (step S412).

  At times t10 to t12, while holding the face direction up and down at + 20 ° and the line-of-sight direction up and down at −20 °, the left and right of the face direction from 0 ° to −30 ° and the line-of-sight direction left and right from 0 ° It is changed to −30 °.

  In this case, at time t11, when the left and right of the face direction is −5 °, the top and bottom are + 20 °, the left and right of the line of sight is −5 °, and the top and bottom are −20 °, the CPU 54 The dashboard unit is determined as the gaze direction, the lighting device 40c of the dashboard unit is turned on, and the other lighting devices are turned off (step S410).

  After time t12, the CPU 54 keeps the left and right of the face direction at -30 °, up and down at + 20 °, left and right of the line of sight at -30 °, and up and down at -20 °. The board portion is determined as the gaze direction, the lighting device 40c in the dashboard portion is turned on, and the other lighting devices are kept off (step S410).

  However, when the set illumination time reaches time t13 after the time t11, the value of the counter exceeds the set value (step S403; No), so the CPU 54 turns off all the illumination devices regardless of the gaze direction. (Step S412).

  As described above, according to the illumination device of this embodiment, it is possible to light any illumination device in a non-contact manner only by changing the direction of the line of sight. Moreover, since appropriate control is performed when the vehicle is stopped and when the vehicle is traveling, operability is also high.

  In the above-described embodiment, the lighting device positioned in the direction of the driver's line of sight is turned on, but the content of the control performed according to the direction of the line of sight is not limited to the turning on / off control. For example, for a lighting device having directivity, the direction of the line of sight may be illuminated by turning on one or more lighting devices by changing the direction of the lighting in accordance with the direction of the driver's line of sight.

  An embodiment of the lighting device having such a configuration will be described with reference to FIGS. 12 and 13.

  Hereinafter, as shown in FIG. 13, the lighting device 40c shown in FIG. 1 is arranged on the dashboard portion of the vehicle, and the stepping motor 70 allows any of the driver side 3A, the upper side 3B, and the passenger side 3C to be arbitrary. It is assumed that the configuration can be switched in the direction.

When the power is turned on, the CPU 54 starts the process shown in FIG.
Thereafter, the processing up to the detection of the face direction and the line-of-sight direction (step S32) is as described above.

  Next, the gaze direction of the driver 60 is determined based on the detected face direction and line-of-sight direction (step S33). Here, when the line-of-sight direction is a dashboard, as shown in FIG. 12, any one of three types of flags (3A to 3C) is set according to the direction of gaze (step S34).

  That is, if the face direction is -15 ° to 0 °, the top and bottom are + 15 ° or more, the gaze direction is -15 ° to -5 °, and the top and bottom is -15 ° or less, the gaze direction is the dashboard. “3A” is set in the gaze direction flag.

  Also, if the left and right of the face direction is -25 ° to -15 °, the top and bottom is + 15 ° or more, the right and left of the line of sight is -25 ° to -15 °, and the top and bottom is -15 ° or less, the gaze direction is a dash Assuming that the center portion of the board is “3B”, the gaze direction flag is set.

  Furthermore, if the face direction is -45 ° to -25 °, the top and bottom is + 15 ° or more, the gaze direction left and right is -45 ° to -25 °, and the top and bottom is -15 ° or less, the gaze direction is a dash Assuming that the board is on the passenger seat side, “3C” is set in the gaze direction flag.

  Next, the CPU 54 executes illumination switching processing (step S4).

  Here, if it is determined that the gaze direction flag is any of “3A”, “3B”, and “3C”, the lighting device 40c of the dashboard that is the gaze direction is turned on and provided for angle (orientation) adjustment. By controlling the stepping motor 70, the lighting device 40c is tilted in the direction in which the driver 60 was particularly gazing. That is, when the gaze direction flag is “3A”, the driver seat side is set to the irradiation direction, when “3B” is set directly above, and when it is “3C”, the passenger seat side is set to the irradiation direction.

  According to such a configuration, directing illumination having directivity in a driver's preferred direction can be performed in a non-contact and simple operation.

  In addition, this invention is not limited to the said Example, A various deformation | transformation and application are possible.

  The gaze direction may be determined by continuing the gaze for a predetermined time (for example, 1 second) by the integration function. Alternatively, the frequency with which the driver 60 gazes during a predetermined time (for example, 3 seconds) may be measured, and the direction in which the frequency exceeds a predetermined number of times (for example, 2 times) may be determined as the gaze direction.

  The system configuration described with reference to FIGS. 1 and 2 is also an example, and can be arbitrarily changed. For example, in the above embodiment, there are four lighting devices installed in the passenger compartment, but the number may be increased or decreased as necessary to change the installation location.

  Moreover, in the said embodiment, although the illuminating device 40c is assumed as an illuminating device which can adjust an irradiation angle, another illuminating device may be sufficient. Further, the angle adjustment is not limited to three steps, and may be continuously adjustable.

  The driving means used for angle adjustment is not limited to a stepping motor, and may be another actuator such as a servo motor.

It is a block diagram which shows the whole structure of the vehicle interior lighting apparatus which concerns on embodiment of this invention. It is a schematic diagram which shows the state which installed the vehicle interior lighting apparatus which concerns on embodiment of this invention in the vehicle. It is a flowchart for demonstrating the illumination control process of the vehicle interior lighting apparatus shown in FIG. It is a flowchart for demonstrating the variable initialization process in the flowchart of FIG. It is a flowchart for demonstrating the gaze direction detection process in the flowchart of FIG. It is a flowchart for demonstrating the gaze direction flag set process in the flowchart of FIG. It is a flowchart for demonstrating the illumination switching process in the flowchart of FIG. It is a figure for demonstrating the code | symbol of the direction of a face. It is a figure for demonstrating the detection method of a gaze direction. It is a figure which shows the specific example of a gaze direction table. It is a figure which shows the specific example of the time series data of a gaze direction. It is a figure which shows the specific example of a part of gaze direction table at the time of performing angle adjustment of an illuminating device. It is a figure for demonstrating the angle adjustment method of an illuminating device.

Explanation of symbols

10 Infrared camera (Imaging means)
20 Infrared illumination (imaging means)
30 vehicle speed sensor 40 lighting device group (lighting means)
50 ECU (Gaze direction detection means, illumination control means)
60 driver 70 stepping motor 100 vehicle

Claims (6)

An imaging means provided in the vehicle for imaging a space including a driver's face;
Gaze direction detection means for detecting a direction in which the driver of the vehicle gazes based on an image captured by the imaging means;
A plurality of illumination means arranged at different positions in the vehicle interior of the vehicle and illuminating a part of the vehicle interior;
Illumination control means for controlling the plurality of illumination means based on the direction of the driver's gaze detected by the gaze direction detection means;
A vehicle interior lighting device comprising:   The vehicle interior lighting device according to claim 1, wherein the gaze direction detection unit determines a gaze direction from the direction of the driver's face and the line-of-sight direction based on the image acquired by the imaging unit. .   The gaze direction detecting means includes a table for determining a direction in which the driver is gazing from the left and right direction and the vertical direction of the driver's face and the horizontal direction and the vertical direction of the line of sight, and based on the table The vehicle interior lighting device according to claim 1, wherein a direction in which the driver gazes is determined.   The vehicle interior lighting device according to claim 1, wherein the lighting control unit selects and lights at least one of the plurality of lighting units. The plurality of illumination means includes illumination angle adjustment means for adjusting an illumination angle of illumination,
The illumination control means controls the illumination angle of the directional illumination by controlling the illumination angle adjusting means.
The vehicle interior lighting device according to claim 1. The illumination control means includes
Discriminating means for discriminating whether the vehicle is stopped or traveling;
When the determination means determines that the vehicle is stopped, when the driver keeps gazing in a certain direction, it lights up while gazing at the illumination means positioned in the gazing direction, and when it is determined that the vehicle is traveling A lighting control unit that turns off the lighting unit located in the gaze direction after the lighting unit is lit for a certain time when the driver continues to gaze in a certain direction.
The vehicle interior lighting device according to claim 1.

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