JP2006044434A - Awakening lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently irradiate a face of a vehicle occupant seated on an occupant seat other than a driver's seat with wake-up light.
SOLUTION: An armrest 14 to which a light source 26 for awakening light is fixed is rotated forward or backward about a shaft 20 and a main body 18 of the armrest 14 is rotated about a shaft 22 in a vehicle width direction. Thus, in addition to the face of the occupant seated in the driver's seat 10, the direction of the light source 26 can be directed toward the face of the occupant seated on the passenger seat side and the face of the occupant seated in the rear seat.
[Selection] Figure 1

Description

  The present invention relates to a wake-up lighting apparatus in which a vehicle is equipped with illumination that wakes up by irradiating the face of an occupant (vehicle occupant) riding a vehicle with light from a light source such as a light bulb, LED, or fluorescent lamp.

  It is known that the face is irradiated with light of about 2500 lux (lx) for about 5 to 10 minutes, and it is known that there is a wake-up effect. For home appliances and medical products, a wake-up lighting device using this is proposed. ing.

  In addition, as an example of a wake-up lighting device mounted on a vehicle, for example, a technique described in Patent Document 2 has been proposed.

In the technique described in Patent Document 2, a wake-up lighting device that effectively prevents a drowsy driving is proposed, which is suitable for a sun visor, an automatic change indicator, a meter panel, and the like that are located in the driver's field of view in a vehicle interior. It has been proposed to provide an awakening lighting unit that gives a sense of tension to give the driver an appropriate sense of tension.
Japanese Utility Model Publication No. 6-50988

  However, as in the technique described in Patent Document 2, the awakening illumination device mounted on a vehicle is configured to irradiate awakening light toward the driver's face. As a result, when trying to prevent sleepiness of a vehicle occupant seated on an occupant seat other than the driver's seat, the wake-up light is efficiently applied to the face of the vehicle occupant seated on the occupant seat other than the driver's seat. Can not.

  The present invention has been made to solve the above-described problem, and an object thereof is to provide a wake-up illumination device capable of efficiently irradiating wake-up light on the face of a vehicle occupant seated on a occupant seat other than the driver's seat. To do.

  The present invention according to claim 1 is a wake-up illumination device for irradiating a face of a vehicle occupant with wake-up light, the light source for irradiating the wake-up light, the light source being attached to the armrest of the occupant seat, and the irradiation direction. And an illumination direction changing means for changing.

By illuminating the wake-up light from the light source attached to the armrest of the occupant seat by the lighting direction changing means toward the face of the vehicle occupant seated on the occupant seat, the wake-up light emitted from the light source is Irradiated to the face of the body and shows awakening effect. Also, if the illumination direction of the light from the light source is changed by the illumination direction changing means, and the position of the face changes depending on the seating position, physique difference, and driving posture of the occupant, the irradiation direction of the awakening light accordingly Is changed.

The present invention according to claim 2 is a wake-up illumination device for irradiating a face of a vehicle occupant with wake-up light. And an illumination direction changing means for changing.

  Close to the face of the vehicle occupant seated on the occupant seat other than the driver's seat facing the back of the occupant seat with the awakening light from the light source attached to the back of the occupant seat by the illumination direction changing means Awakening light is emitted from the position.

  According to a third aspect of the present invention, in the wakeful illumination device according to the second aspect, the light source is attached to a headrest of a passenger seat.

  Close to the face of the vehicle occupant seated on the occupant seating seat other than the driver's seat facing the headrest of the occupant seating seat by the lighting direction changing means. Awakening light is emitted from the position.

  According to a fourth aspect of the present invention, in the wakeful illumination device according to the second aspect, the light source is attached to a seat back of a seat for a passenger seat.

  By means of the illumination direction changing means, the face on the face of the vehicle occupant seated on the occupant seat other than the driver's seat facing the wake light from the light source attached to the seat back of the occupant seat Awakening light is irradiated from a position close to.

  The present invention according to claim 1 is a wake-up illumination device for irradiating a face of a vehicle occupant with wake-up light, the light source for irradiating the wake-up light, and attaching the light source to the armrest of the occupant seat, and changing the irradiation direction Therefore, the wake-up light can be efficiently applied to the face of the vehicle occupant seated on the occupant seat other than the driver's seat.

  The present invention according to claim 2 is a wake-up illumination device for irradiating the face of a vehicle occupant with a wake-up light, the light source for irradiating the wake-up light, the light source attached to the back of the occupant seating seat, and the irradiation direction being changed. Therefore, the wake-up light can be efficiently applied to the face of the vehicle occupant seated on the occupant seat other than the driver's seat.

  According to a third aspect of the present invention, in the wakeful illumination device according to the second aspect, since the light source is attached to the headrest of the occupant seat, the wake light is emitted to the face of the vehicle occupant seated on the occupant seat other than the driver seat. Can be irradiated efficiently.

  According to a fourth aspect of the present invention, in the wakeful illumination device according to the second aspect, since the light source is attached to the seat back of the occupant seat, the wake light is applied to the face of the vehicle occupant seated on the occupant seat. Can be efficiently irradiated.

  A first embodiment of a wake-up lighting device according to the present invention will be described with reference to FIGS.

  In the figure, the arrow FR indicates the vehicle body front direction, the arrow UP indicates the vehicle body upward direction, and the arrow IN indicates the vehicle width inside direction.

  As shown in FIG. 2, in the present embodiment, an armrest 14 is attached to an inner side wall portion 12 </ b> A in the vehicle width direction of a seat back 12 in a driver's seat 10 as a passenger seat for an automobile. The armrest 14 has a rectangular box shape in which the longitudinal direction is the longitudinal direction of the vehicle body in the normal use state shown in FIG.

  The attachment portion 16 of the armrest 14 to the seatback 12 is attached to the rear end portion of the main body 18 of the armrest 14 when the armrest 14 is in a normal use state (state shown in FIG. 2).

  As shown in FIG. 4, the mounting portion 16 of the armrest 14 is pivotally supported by a shaft 20 as an illumination direction changing means that protrudes inward in the vehicle width direction from the vehicle width direction inner side wall portion 12 </ b> A of the seat back 12. Yes. In addition, the mounting portion 16 of the armrest 14 can rotate together with the main body 18 of the armrest 14 around the shaft 20 forward (in the direction of arrow A in FIG. 4) and rearward (in the direction of arrow B in FIG. 4). .

  Therefore, the main body 18 of the armrest 14 has a normal use position where the arm of the passenger seated in the driver's seat 10 of the automobile shown in FIG. 4 can be supported, and the armrest 14 as shown by a two-dot chain line in FIG. It can move between awakening light irradiation positions on the vehicle body rear side of the mounting portion 16.

  As shown in FIG. 2, the main body 18 of the armrest 14 is pivotally supported by a shaft 22 as an illumination direction changing means attached at right angles to the shaft 20 from the longitudinal middle portion of the shaft 20. The main body 18 is rotatable in the vehicle width direction (arrow C direction and arrow D direction in FIG. 1) around the vehicle body longitudinal axis 22 in the normal use position.

  Further, when the armrest 14 is in the normal use position, a light source 26 for irradiating awakening light is fixed to the light source arrangement portion 18A on the lower surface side of the main body 18. Although not shown, the wiring to the light source 26 passes through the shafts 22 and 20 and reaches the seat back 12.

  The light source 26 has a large, substantially rectangular panel shape that can be attached to the lower surface side of the armrest 14, and is in the lower surface side of the armrest 14 in a normal use state so as not to interfere with the arm of the passenger.

  Therefore, by rotating the main body 18 of the armrest 14 around the shaft 22 in the vehicle width direction (the direction of arrow C or arrow D in FIG. 1), as shown by the solid line in FIG. The face 32A of the occupant 32 seated in the passenger seat 31 as a vehicle occupant can be directed toward the face 30A of the occupant 30 seated in the driver's seat 10 as shown by a two-dot chain line in FIG. It can be directed in the direction of.

  Further, as shown in FIG. 5, the main body 18 of the armrest 14 together with the mounting portion 16 is rotated from the normal use position indicated by a two-dot chain line in FIG. 5 around the shaft 20 to the rear of the vehicle body (in the direction of arrow B in FIG. 5). Then, by moving from the horizontal position to a further rotated position, the light source 26 can be directed toward the face 38A of the occupant 38 seated on the rear seat 36 as a vehicle occupant, as shown by the solid line in FIG. It has become.

  Further, as indicated by a two-dot chain line in FIG. 4, the body 18 of the armrest 14 is rotated about the shaft 22 in the vehicle width direction (arrow E direction or arrow F direction in FIG. The seat 36 can be directed toward the face of the occupant seated at a different position in the vehicle width direction.

  Next, the operation of this embodiment will be described.

  In the present embodiment, the body 18 of the armrest 14 to which the light source 26 is fixed is rotated in the vehicle width direction (direction of arrow C or arrow D in FIG. 1) about the shaft 22 to drive the direction of the light source 26. The face 30A of the occupant 30 seated on the seat 10 or the face 32A of the occupant 32 seated on the passenger seat 31 can be directed.

  That is, as shown by a solid line in FIG. 3, the face 30A of the occupant 30 seated in the driver's seat 10 can be efficiently irradiated with the awakening light from the large light source 26 located close to the face 30A. As shown by the two-dot difference line, the wake-up light can be efficiently irradiated from the large light source 26 located close to the face 38A to the face 38A of the passenger 38 seated in the passenger seat 31 other than the driver's seat 10.

  Further, as shown by a solid line in FIG. 5, the light source 26 is seated on the rear seat 36 other than the driver seat 10 by rotating the armrest 14 about the shaft 20 toward the rear of the vehicle body (in the direction of arrow B in FIG. 4). In the direction of the face 38A of the occupant 38, as shown by a two-dot chain line in FIG. 4, the main body 18 of the armrest 14 is arranged in the vehicle width direction (in the direction of arrow E or arrow F in FIG. ), The light source 26 can be directed toward the face 38A of the occupant 38 seated at a different position in the vehicle width direction of the rear seat 36.

  For this reason, the wake-up light can be efficiently irradiated from the large light source 26 located near the face 38A to the face 38A of the occupant 38 seated at different positions in the vehicle width direction of the rear seat 36.

  In addition, it is good also as a structure which drives the main body 18 of the armrest 14 automatically with actuators, such as a motor, simultaneously with the electricity supply to the light source 26 by operation of the switch provided in the driver's seat 10 grade | etc.,.

  Next, a second embodiment of the awakening illumination device of the present invention will be described with reference to FIGS.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 6, in the present embodiment, an armrest 44 is attached to the front surface 42 </ b> A of the center portion in the vehicle width direction of the seat back 42 in the rear seat 40 of the automobile. The armrest 44 has a thin rectangular box shape with the longitudinal direction of the vehicle body in the normal use state shown in FIG.

  A recess 46 is formed in the center of the seat back 42 in the vehicle width direction from the front side of the vehicle body. A mounting portion 44A of the armrest 44 to the seat back 42 is rotatably supported by a shaft 48 below the left and right wall portions 46A of the recess 46. Further, the armrest 44 is rotatable about a shaft 48 in the vehicle body front (in the direction of arrow G in FIG. 6) and the vehicle body rearward (in the direction of arrow H in FIG. 6).

  Therefore, the armrest 44 is movable between a normal use position (position shown in FIG. 6) capable of supporting the occupant's arm seated on the rear seat 40 and a storage position stored in the recess 46. Yes.

  A rectangular opening 50 having a longitudinal direction in the vehicle width direction is formed at the distal end portion 44B of the armrest 44. A first arm 52 as an illumination direction changing means is attached in the opening 50 along the longitudinal direction of the armrest 44, and the first arm 52 can be expanded and contracted in the longitudinal direction of the vehicle body.

  One end of a second arm 56 as an illumination direction changing means is connected to the front end of the first arm 52 via a ball joint 54 as an illumination direction changing means. A light source 58 for irradiating awakening light is attached to the other end of the second arm 56. Although not shown, the wiring to the light source 58 passes through the second arm 56 and the first arm 52 and reaches the seat back 42.

  The light source 58 has a large, substantially rectangular panel shape that can be stored in the armrest 44. When not used, the light source 58 is stored in the armrest 44 through the opening 50 due to contraction of the first arm 52.

  Therefore, when the light source 58 is used, the light source 58 is pulled out from the inside of the armrest 44 through the opening 50. At this time, the light source 58 can be completely pulled out from the inside of the armrest 44 by extending the first arm 52.

  Further, the direction of the light source 58 can be changed in the vehicle width direction (direction of arrow J in FIG. 6) and the vertical direction (direction of arrow K in FIG. 6) by the ball joint 54, and at the position changed by the frictional force of the ball joint 54. It is supposed to be retained.

  Accordingly, as shown by a solid line in FIG. 7, the light source 58 can be directed toward the face 60A of the occupant 60 seated on the right side of the vehicle body as the vehicle occupant of the rear seat 40, and also shown by a two-dotted line in FIG. Thus, the light source 58 can be directed toward the face 62A of the occupant 62 seated on the left side of the vehicle body of the rear seat 40 as a vehicle occupant.

  Next, the operation of this embodiment will be described.

  In the present embodiment, the light source 58 can be completely pulled out from the inside of the armrest 44 by extending the first arm 52. Further, the rotation of the ball joint 54 attached to the connecting portion between the second arm 56 and the first arm 52 that supports the light source 58 changes the direction of the light source 58 in the vehicle width direction (arrow J direction in FIG. 6) and the vertical direction ( It can be changed in the direction of arrow K in FIG.

  That is, the light source 58 can be directed toward the face 60A of the occupant 60 seated on the right side of the vehicle body of the rear seat 40, as indicated by the solid line in FIG. For this reason, it is possible to efficiently wake up the face 60A of the occupant 60 seated on the right side of the rear seat 40 other than the driver's seat from the large light source 58 located close to the face 60A.

  Further, as indicated by a two-dot line in FIG. 7, the light source 58 can be directed toward the face 62 </ b> A of the occupant 62 seated on the left side of the vehicle body of the rear seat 40. For this reason, it is possible to efficiently irradiate the face 62A of the occupant 62 seated on the left side of the vehicle body of the rear seat 40 from the large light source 58 located close to the face 62A.

  The light source 58 may be driven automatically by an actuator such as a motor simultaneously with energization of the light source 58 by operating a switch provided in the rear seat 40 or the like.

  Next, a third embodiment of the awakening illumination device of the present invention will be described with reference to FIG.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 8, in the present embodiment, a rectangular recess 74 is formed from the rear side of the vehicle body on the back surface (rear side surface in the vehicle longitudinal direction) 72A of the headrest 72 in the driver's seat 70 of the automobile. Inside the recess 74, a light source 76 for irradiating awakening light is attached. The light source 76 has a large, substantially rectangular panel shape that can be stored on the back surface 72 </ b> A of the headrest 72.

  The center part in the vertical direction of the vehicle width direction both ends 76A of the light source 76 is connected to the left and right rods 80 of the headrest 72 via a shaft 78 as an illumination direction changing means fixed along the vehicle width direction. Although not shown, the wiring to the light source 76 passes through the inside of the rod 80 and reaches the seat back of the driver's seat 70.

  The light source 76 is rotatable about an axis 78 upward (in the direction of arrow L in FIG. 8) and downward (in the direction of arrow M in FIG. 8).

  Accordingly, by rotating the light source 76 about the shaft 78 upward (in the direction of arrow L in FIG. 8) or downward (in the direction of arrow M in FIG. 8), the occupant seated in the rear seat as the vehicle occupant It can be directed to the face.

  Next, the operation of this embodiment will be described.

  In the present embodiment, a light source 76 is rotatably mounted around a shaft 78 in a rectangular recess 74 formed on the back surface 72 </ b> A of the headrest 72 in the driver's seat 70. As a result, the light source 76 is rotated upward (in the direction of the arrow L in FIG. 8) or downward (in the direction of the arrow M in FIG. 8) about the shaft 78, so that the occupant seated in the rear seat other than the driver's seat Can be directed toward the face.

  For this reason, the wake-up light can be efficiently emitted from the large light source 76 located close to the face of the occupant seated in the rear seat to the face of the occupant seated in the rear seat.

  The light source 76 may be driven automatically by an actuator such as a motor simultaneously with energization of the light source 76 by operating a switch provided in the rear seat.

  Next, a fourth embodiment of the awakening illumination device of the present invention will be described with reference to FIG.

  In addition, about the same member as 3rd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 9, in the present embodiment, a light source 86 as a light source for irradiating awakening light is directly attached to the back surface (rear side surface in the vehicle longitudinal direction) 84A of the headrest 84 in the driver's seat 82 of the automobile.

  The light source 86 is fixed to the left and right rods 88 of the headrest 84 as illumination direction changing means, and the headrest 84 is forward (in the direction of arrow N in FIG. 9) and backward (in the direction of the arrow N in FIG. 9). 9 (in the direction of arrow P). Although not shown, the wiring to the light source 86 reaches the seat back of the driver's seat 82 through the inside of the rod 88.

  The light source 66 has a large, substantially rectangular panel shape that can be attached to the back surface 84 </ b> A of the headrest 84.

  Accordingly, by rotating the headrest 84 forward (in the direction of arrow N in FIG. 9) or rearward (in the direction of arrow P in FIG. 9) about the rotation axis 90, the rear seat 92 serving as a vehicle occupant together with the headrest 84 is used. The passenger 94 can be directed toward the face 94A.

  Next, the operation of this embodiment will be described.

  In the present embodiment, the headrest 84 of the driver's seat 82 can be rotated forward (in the direction of arrow N in FIG. 9) or rearward (in the direction of arrow P in FIG. 9) around the rotation shaft 90. A light source 86 fixed to the left and right rods 88 is attached to the back surface 84A. As a result, the headrest 84 is rotated forward (in the direction of arrow N in FIG. 9) or rearward (in the direction of arrow P in FIG. 9) about the rotation axis 90, so that the light source 86 is moved to the rear seat 92 other than the driver seat 82. It can be directed toward the face 94A of the seated passenger 94.

  For this reason, the wake-up light can be efficiently radiated from the large light source 86 located close to the face 94A to the face 94A of the occupant 94 seated on the rear seat 92.

  Further, since the light source 86 may be fixed to the rod 88 of the headrest 84, the illumination direction changing means for the light source 86 is not required separately, and the configuration is simplified.

  The light source 86 may be driven automatically by an actuator such as a motor simultaneously with energization of the light source 86 by operating a switch provided in the rear seat 92 or the like.

  Next, a fifth embodiment of the awakening illumination device of the present invention will be described with reference to FIGS.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 10, in the present embodiment, a rectangular notch 100 is formed at the middle in the vertical direction of the backboard 98A constituting the back surface (rear side surface in the vehicle longitudinal direction) of the seat back 98 in the driver's seat 96 of the automobile. Has been. In addition, a light source 102 that emits awakening light is attached inside the notch 100, and the light source 102 has a large substantially rectangular panel shape that can be stored in the backboard 98A. Although not shown, the wiring to the light source 102 reaches the seat back 98 in the driver's seat 96.

  The upper ends of both end portions 102A of the light source 102 in the vehicle width direction are connected to left and right seat back frames (not shown) via shafts 104 as illumination direction changing means fixed along the vehicle width direction. Further, the light source 102 is rotatable about the shaft 104 upward (in the direction of arrow Q in FIG. 10) and downward (in the direction of arrow R in FIG. 10).

  Therefore, as shown by a solid line in FIG. 11, the light source 102 is rotated upward (in the direction of arrow Q in FIG. 11) or downward (in the direction of arrow R in FIG. 11) about the shaft 104, thereby making the light source 102 a vehicle occupant. It can be turned toward the face 110A of the occupant 110 seated on the rear seat 108.

  Next, the operation of this embodiment will be described.

  In the present embodiment, a light source 102 is attached to a notch 100 formed in a back board 98 </ b> A of a seat back 98 in a driver's seat 96 so as to be rotatable around a shaft 104. As a result, the light source 102 is rotated around the shaft 104 upward (in the direction of arrow Q in FIG. 10) or downward (in the direction of arrow R in FIG. 10), so that the light source 102 is seated on the rear seat 108 other than the driver seat 96. Can be directed toward the face 110A of the occupant 110.

  Therefore, the wake-up light can be efficiently emitted from the large light source 102 located close to the face 110A of the occupant 110 seated in the rear seat 108 to the face 110A of the occupant 110 seated in the rear seat 108.

  Note that the light source 102 may be automatically driven by an actuator such as a motor simultaneously with energization of the light source 102 by operating a switch provided at the rear seat.

  In the above, the present invention has been described in detail with respect to specific embodiments. However, the present invention is not limited to the above embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, the awakening illumination device of the present invention is applied to the driver seat and the rear seat, but the awakening illumination device of the present invention is also applied to other passenger seats such as a passenger seat and a third row seat. Is possible. Moreover, it is good also as a structure which changes the irradiation direction of awakening light with a mirror etc., without changing the direction of a light source.

It is the perspective view seen from the vehicle body inner side diagonal direction which shows the use condition of the awakening lighting apparatus in the driver's seat to which the awakening lighting apparatus which concerns on 1st Embodiment of this invention was applied. It is the perspective view seen from the vehicle body inner side diagonal front which shows the normal use state of the armrest in the driver's seat to which the awakening lighting apparatus which concerns on 1st Embodiment of this invention was applied. It is a schematic front view which shows the use condition of the awakening illumination apparatus in the driver's seat and the passenger seat to which the awakening illumination apparatus which concerns on 1st Embodiment of this invention is applied. It is the perspective view seen from the vehicle body inner side diagonal front which shows the driver's seat to which the alertness lighting device concerning a 1st embodiment of the present invention was applied. It is a schematic side view which shows the use condition of the awakening illumination apparatus to the backseat in the driver's seat to which the awakening illumination apparatus which concerns on 1st Embodiment of this invention is applied. It is the perspective view seen from the vehicle body diagonal front which shows the use condition of the awakening lighting apparatus in the rear seat to which the awakening lighting apparatus which concerns on 2nd Embodiment of this invention was applied. It is a schematic front view which shows the use condition of the awakening lighting apparatus in the backseat to which the awakening lighting apparatus which concerns on 2nd Embodiment of this invention is applied. It is the perspective view seen from the vehicle body inside diagonally back which shows the driver's seat to which the alertness lighting apparatus which concerns on 3rd Embodiment of this invention was applied. It is a schematic side view which shows the driver's seat and the backseat to which the alertness lighting apparatus which concerns on 4th Embodiment of this invention was applied. It is the perspective view seen from the vehicle body inside diagonally back which shows the driver's seat to which the alertness lighting device concerning a 5th embodiment of the present invention was applied. It is a schematic side view which shows the driver's seat and the backseat to which the alertness lighting apparatus which concerns on 5th Embodiment of this invention was applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Driver's seat 12 Seat back 14 Armrest 16 Armrest attachment part 18 Armrest main body 20 Axis (illumination direction changing means)
22 axis (illumination direction changing means)
26 Light source 36 Rear seat 40 Rear seat 42 Seat back 44 Armrest 48 Axis 50 Opening 52 First arm (illumination direction changing means)
54 Ball joint (lighting direction changing means)
56 Second arm (illumination direction changing means)
58 Light source 70 Driver's seat 72 Headrest 72A Back of headrest 76 Light source 78 Axis (illumination direction changing means)
80 Rod 82 Driver's seat 84 Headrest 86 Light source 88 Left and right rods of headrest (lighting direction changing means)
90 Rotating shaft 96 Driver's seat 98 Seat back 102 Light source 104 Axis (illumination direction changing means)

Claims (4)

An awakening illumination device that emits awakening light to the face of a vehicle occupant,
A light source that emits awakening light,
Attaching the light source to the armrest of the occupant seat, and changing the illumination direction, illumination direction changing means,
An awakening illumination device characterized by comprising: An awakening illumination device that emits awakening light to the face of a vehicle occupant,
A light source that emits awakening light,
Attaching the light source to the back of the occupant seating seat, and illumination direction changing means for changing the irradiation direction,
An awakening illumination device characterized by comprising:   The awakening illumination device according to claim 2, wherein the light source is attached to a headrest of an occupant seat.   The awakening illumination device according to claim 2, wherein the light source is attached to a seat back of a passenger seat.

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