WO2020235377A1

WO2020235377A1 - Lighting device and head-up display

Info

Publication number: WO2020235377A1
Application number: PCT/JP2020/018800
Authority: WO
Inventors: さやか水野
Original assignee: 日本精機株式会社
Priority date: 2019-05-21
Filing date: 2020-05-11
Publication date: 2020-11-26
Also published as: JP7334778B2; JPWO2020235377A1

Abstract

Provided are a lighting device and a head-up display such that an arrangement interval between light-emitting element bodies of the lighting device is reduced by reducing the wiring width. The present invention includes: a first wiring section 681 including a common wire 681a electrically connected in common to multiple light-emitting element bodies 8 of a first group G1 and individual wires 681b electrically connected respectively to the multiple light-emitting element bodies 8 of the first group G1; a second wiring section 682 including a common wire 682a electrically connected in common to multiple light-emitting element bodies 8 of a second group G2 and individual wires 682b electrically connected respectively to the multiple light-emitting element bodies 8 of the second group G2; and a control unit 692 for controlling the multiple light-emitting element bodies 8. The control unit 692 is capable of executing first control to cause, among the multiple light-emitting element bodies 8, only some of the multiple light-emitting element bodies 8 to simultaneously turn on. The multiple light-emitting element bodies 8 of the first group G1 include light-emitting element bodies 8 which are not turned on by the first control.

Description

Lighting equipment and head-up display

This disclosure relates to lighting equipment and head-up displays.

Patent Document 1 discloses a backlight unit of a head-up display, which is configured to include a plurality of light emitting elements arranged on a substrate and illuminates a liquid crystal panel from behind.

Further, Patent Document 2 discloses a head-up display that detects the viewpoint of a vehicle occupant and controls the light emission intensity of the light emitting element body according to the viewpoint of the occupant.

Japanese Unexamined Patent Publication No. 2011-090976 International Publication No. 2017/002344

However, in a lighting device such as a backlight unit of a head-up display in which a large current flows through a light emitting element body, a current allowable value for the wiring width is set in order to suppress a temperature rise of the substrate due to the large current. Therefore, it is difficult to densely arrange a plurality of light emitting element bodies due to the influence of the wiring width.

Therefore, an object of the present disclosure is to provide a lighting device and a head-up display capable of narrowing the wiring width and narrowing the arrangement interval of the light emitting element body.

On one side,
A plurality of light emitting element bodies arranged in an array, including a plurality of light emitting element bodies of the first group and a plurality of light emitting element bodies of the second group.
The first wiring including the common wiring commonly electrically connected to the plurality of light emitting element bodies of the first group and the individual wiring electrically connected to each of the plurality of light emitting element bodies of the first group. Department and
A second wiring including a common wiring commonly electrically connected to the plurality of light emitting element bodies of the second group and an individual wiring electrically connected to each of the plurality of light emitting element bodies of the second group. Department and
A control unit that controls the plurality of light emitting element bodies via the first wiring unit and the second wiring unit is included.
The control unit can execute the first control of simultaneously lighting only a part of a plurality of light emitting elements among the plurality of light emitting elements.
A lighting device is provided in which the plurality of light emitting element bodies of the first group includes a light emitting element body that is not lit by the first control.

According to the present disclosure, it is possible to narrow the wiring width and narrow the arrangement interval of the light emitting element body.

It is a perspective view which shows the internal structure of the head-up display by one Example from the upper side. It is a figure which shows roughly the vehicle-mounted state of the head-up display in the vehicle side view. It is a perspective view of the TFT panel unit in a single item state. It is an exploded perspective view of the TFT panel unit. It is a perspective view of the backlight unit in a single item state. It is an exploded perspective view of the backlight unit. It is a circuit diagram which shows the lighting control circuit of a light emitting element body. It is a top view of a light emitting substrate. It is a figure which shows the example of lighting control of a light emitting substrate by a control part, and is the figure which shows the lighting pattern 1. It is a figure which shows the example of the lighting control of a light emitting substrate by a control unit, and is the figure which shows the lighting pattern 2. It is a figure which shows the example of the lighting control of a light emitting substrate by a control unit, and is the figure which shows the lighting pattern 3.

Hereinafter, each embodiment will be described in detail with reference to the attached drawings. In addition, in FIG. 1A and the like, for the sake of easy viewing, there are cases where a reference reference numeral is only partially attached to a plurality of parts having the same attribute.

[Head-up display configuration]
FIG. 1A is a perspective view showing the internal configuration of the head-up display 1 according to the embodiment from above. FIG. 1B is a diagram schematically showing a vehicle-mounted state of the head-up display 1 when viewed from the side of the vehicle. Note that in FIG. 1A, the illustration of some components of the head-up display 1 is omitted. In FIG. 1A, the X direction (second direction), the Y direction, and the Z direction (first direction), which are three directions orthogonal to each other, are defined in the right-handed system. In the following, formally, the Z direction is the vertical direction, the positive side is the upper side, and the negative side is the lower side.

The head-up display 1 is mounted in the instrument panel 9 of the vehicle. The head-up display 1 may be mounted in a direction in which the Y direction of FIG. 1A substantially corresponds to the vehicle width direction.

The head-up display 1 includes a case 2, a TFT (Thin Film Transistor) panel unit 3, mirrors 4 and 5 (an example of a reflecting mirror), and a backlight unit 6 (an example of a lighting device).

The case 2 forms the housing of the head-up display 1. The case 2 is a lower case that forms the lower part of the housing of the head-up display 1. The case 2 is combined with an upper case (not shown in FIG. 1A).

Case 2 is formed of a highly heat-conducting material such as aluminum. Case 2 includes a heat dissipation portion 21 as shown in FIG. 1A. The heat radiating portion 21 is formed on the outer surface (surface exposed to the outside) of the case 2. The heat radiating portion 21 has a function of radiating heat generated from the backlight unit 6. The heat radiating portion 21 releases heat to the air flowing outside the case 2.

The TFT panel unit 3 is a display device that uses the light from the backlight unit 6 as a backlight and emits image light according to the display image. The display image is arbitrary, and may be, for example, an image representing navigation information, various vehicle information, and the like.

The TFT panel unit 3 is fixed to the case 2. For example, as shown in FIG. 1A, the TFT panel unit 3 is fastened with screws 90 at two locations on both sides in the X direction.

FIG. 2 is a perspective view of the TFT panel unit 3 in a single item state, and FIG. 3 is an exploded perspective view of the TFT panel unit 3.

The TFT panel unit 3 includes a TFT holder 31, a TFT panel 32 (an example of a display), a diffusion sheet 33, and a TFT cover 34. The TFT holder 31 is fixed to the case 2 as described above. The TFT holder 31 holds the TFT panel 32. The TFT panel 32 is a dot matrix type TFT (Thin Film Transistor) panel or the like. The TFT panel 32 is provided so that the long side direction corresponds to the X direction. The TFT cover 34 is fitted and coupled to the TFT holder 31. The TFT panel 32 and the diffusion sheet 33 are held between the TFT cover 34 and the TFT holder 31 in the Y direction.

The mirrors 4 and 5 reflect the image light emitted from the TFT panel unit 3 and emit the image light (display light) from the outlet provided in the upper case (not shown), and windshield the vehicle VC. Direct to glass WS (an example of a transmission / reflection part). In this embodiment, two mirrors 4 and 5 are provided, but the number of mirrors is arbitrary. In this embodiment, as an example, the mirror 4 is a flat mirror and the mirror 5 is a concave mirror. The mirror 5 may be rotatably supported with respect to the case 2 so that the vertical position of the area exposed to the image light on the windshield glass WS can be adjusted.

When the windshield glass WS is irradiated with the image light, as shown in FIG. 1B, for the driver who drives the vehicle VC, the display image obtained by the irradiation is in front of the windshield glass WS. Virtual image display) VI can be seen. As a result, the driver can visually recognize the displayed image VI by superimposing it on the front scenery, and can grasp the vehicle information and the like in a mode in which the line of sight movement is small, which improves convenience and safety.

The backlight unit 6 is provided behind the TFT panel unit 3 (negative side in the Y direction). The backlight unit 6 cooperates with the TFT panel unit 3 to generate image light. The backlight unit 6 is fixed to the case 2.

[Backlight unit configuration]
FIG. 4 is a perspective view of the backlight unit 6 in a single item state, and FIG. 5 is an exploded perspective view of the backlight unit 6.

The backlight unit 6 has a function of emitting light from the light emitting element body 8 to the TFT panel unit 3 and transferring the heat generated by the light emitting element body 8 to the heat radiating portion 21.

The backlight unit 6 includes a lens cover 61, a first lens spring 62, a condenser lens 63 (an example of a lens), a diffuser plate 64 (an example of a lens), a lens holder 65, and a second lens spring 66. , A lens array 67 (an example of a lens), a light emitting substrate 68, and a control substrate 69.

The lens cover 61 covers the front surface (positive side in the Y direction) of the backlight unit 6. The lens cover 61 has an opening 611 from which the condenser lens 63 is exposed. The lens cover 61 is fitted and coupled to the lens holder 65. In this embodiment, as an example, the lens cover 61 has claws 612 extending in the negative direction in the Y direction at four corners, and is fitted and coupled to the lens holder 65 by the claws 612.

The first lens spring 62 is in the form of a leaf spring, and is provided between the lens cover 61 and the condenser lens 63 in the Y direction. The first lens springs 62 are provided in pairs in the vertical direction. Each of the first lens springs 62 is fixed to the upper side and the lower side side surfaces of the lens cover 61. Each of the first lens springs 62 urges the condenser lens 63 together with the diffuser plate 64 toward the lens holder 65. As described above, the first lens spring 62 has a function of defining the positions of the condenser lens 63 and the diffuser plate 64 in the Y direction with respect to the lens holder 65.

The diffuser plate 64 and the condenser lens 63 diffuse and collect the light from the light emitting element body 8 that is incident through the lens array 67 toward the front surface (positive side in the Y direction) of the backlight unit 6. It has a function of emitting light. The diffusion plate 64 is, for example, a plate shape formed of a translucent resin material and having at least one surface subjected to fine unevenness processing.

The diffuser plate 64 and the condenser lens 63 are held on the positive side of the lens holder 65 in the Y direction. For example, the diffuser plate 64 and the condenser lens 63 each have through holes 641,631 through which the pin portion 650 of the lens holder 65 passes, and the positions in the Z direction and the X direction with respect to the lens holder 65 are defined.

The lens holder 65 holds the diffuser plate 64 and the condenser lens 63, and also holds the lens array 67. The lens holder 65 is fixed to the case 2. The backlight unit 6 is fixed to the case 2 by fixing the lens holder 65 to the case 2.

The second lens spring 66 is in the form of a leaf spring and is fixed to the lens holder 65. The second lens spring 66 has a function of urging the lens array 67 toward the light emitting substrate 68.

The lens array 67 is formed of a translucent resin material and is arranged so as to cover the positive side of the light emitting substrate 68 in the Y direction. The lens array 67 includes a collimator portion 671 having a conical convex outer peripheral surface obtained by rotating a substantially free-running wire. The lens array 67 is located so as to face the light emitting element 8 mounted on the light emitting substrate 68, and transmits the light radiated from the light emitting element 8 to the positive side in the Y direction. The outer shape of the lens array 67 is a rectangle (a rectangle whose long side is in the X direction) that is substantially the same as the outer shape of the TFT panel unit 3 (and the TFT panel 32).

The light emitting substrate 68 is provided behind the lens array 67 (on the negative side in the Y direction). A plurality of light emitting element bodies 8 are mounted in an array on the surface of the light emitting substrate 68 on the side facing the lens array 67. Each light emitting element 8 is one or a plurality of LEDs (Light Emitting Diodes). The arrangement method and number of the light emitting element bodies 8 are arbitrary. The light emitting element body 8 is provided so that the optical axis direction (Y direction) is perpendicular to the light emitting substrate 68. An example of a preferable arrangement and number of light emitting element bodies 8 in the light emitting substrate 68 will be described later.

The control board 69 is electrically connected to the light emitting board 68 and controls the lighting of a plurality of light emitting element bodies 8 provided on the light emitting board 68. For example, the control board 69 of the present embodiment receives a detection signal from the detection unit S (see FIG. 1B) that detects the viewpoint of the occupant of the vehicle VC, and lights up the plurality of light emitting elements 8 according to the viewpoint of the occupant. The viewpoint-compatible lighting control (an example of the first control) for determining the above is performed. The detection unit S is configured by using a camera for photographing the occupant, an infrared sensor, or the like.

[Structure of light emitting board and control board]
FIG. 6 is a circuit diagram showing a lighting control circuit of the light emitting element body 8, FIG. 7 is a plan view of the light emitting board 68, and FIGS. 8A to 8C show lighting control of the light emitting board 68 by the control unit 692. 8A is a diagram showing a lighting pattern 1, FIG. 8B is a diagram showing a lighting pattern 2, and FIG. 8C is a diagram showing a lighting pattern 3.

As shown in FIG. 6, the lighting control circuit of the light emitting element 8 includes a plurality of light emitting elements 8 provided on the light emitting board 68, an LED driver 691 provided on the control board 69, and a control unit 692.

The LED driver 691 is an IC capable of driving a predetermined number of light emitting element bodies 8. For example, the LED driver 691 shown in FIG. 6 is a 4-channel LED driver IC capable of driving four light emitting element bodies 8. As shown in FIGS. 7 and 8A to 8C, the light emitting substrate 68 of the present embodiment has seven light emitting element bodies 8 in the horizontal direction (X direction) and five light emitting element bodies 8 in the vertical direction (Z direction) in a matrix. Have been placed. Therefore, when all 35 light emitting element bodies 8 are driven by using the 4-channel LED driver ICs, at least 9 LED drivers 691 are mounted on the control board 69. Hereinafter, a plurality of light emitting element bodies 8 driven by one LED driver 691 will be referred to as a group.

Further, the LED driver 691 shows an embodiment having a booster circuit as an example of a configuration for supplying electric power to the light emitting element body 8, but the LED driver 691 has a voltage required for supplying electric power to the light emitting element body 8. A step-down circuit and a buck-boost circuit can be applied accordingly.

The control unit 692 is, for example, a microcomputer (microcontroller). The control unit 692 controls the lighting of the plurality of light emitting element bodies 8 via the LED driver 691. For example, the control unit 692 of the present embodiment lights and controls 35 light emitting element bodies 8 via nine LED drivers 691.

As shown in FIGS. 8A to 8C, the control unit 692 executes a control for simultaneously lighting only a part of the light emitting element bodies 8 out of the 35 light emitting element bodies 8. As lighting patterns in which the control unit 692 lights only a part of the light emitting element bodies 8 at the same time, for example, as shown in FIG. 8A, a lighting pattern 1 in which 5 horizontal × 3 vertical light emitting elements 8 are simultaneously turned on As shown in FIG. 8B, the lighting pattern 2 for simultaneously lighting the four horizontal × three vertical light emitting element bodies 8 and the lighting for simultaneously lighting the four horizontal × two vertical light emitting element bodies 8 as shown in FIG. 8C. Pattern 3 and is included. In addition, in FIGS. 8A to 8C, A to D described in the position of the light emitting element body 8 to be turned on indicate the light emitting intensity (A> B> C> D) of the light emitting element body 8.

The control unit 692 of the present embodiment selects lighting patterns 1 to 3 according to predetermined conditions, and moves the lighting range while maintaining the lighting patterns 1 to 3 according to the viewpoint of the occupant detected by the detection unit S. Let me. Therefore, in the examples shown in FIGS. 8A to 8C, the maximum number of lights of the light emitting element 8 in the horizontal direction is 5, and the maximum number of lights of the light emitting element 8 in the vertical direction is 3.

As shown in FIGS. 6 and 7, the light emitting substrate 68 has a wiring portion 681,682,683 and a wiring portion 681,682 whose one end side is electrically connected to a plurality of light emitting element bodies 8 belonging to each group. Connector 648, 685, to which the other end of the 683 is electrically connected, is provided.

The

wiring portions

681, 682, 683 are connected to the

common wirings

681a, 682a, 683a which are commonly electrically connected to the plurality of light emitting element bodies 8 belonging to each group, and to each of the plurality of light emitting element bodies 8 belonging to each group. Includes individually connected

wires

681b, 682b, 683b. As shown in FIG. 6, the

common wirings

681a, 682a, 683a of the present embodiment are electrically connected to the anodes of the light emitting element bodies 8 belonging to each group. Further, the

individual wirings

681b, 682b, and 683b of the present embodiment are electrically connected to the cathode of each light emitting element 8 belonging to each group. The common wirings 681a, 682a, 683a may be electrically connected to the cathode of the light emitting element body 8, and the

individual wirings

681b, 682b, 683b may be electrically connected to the anode of the light emitting element body 8. In FIG. 7, for convenience of understanding, the

individual wirings

681b, 682b, and 683b are shown in a relatively dark hatched region.

The connectors 648, 685 are connected to the control board 69 via a cable (not shown), and the

wiring portions

681, 682, 683 of each group are electrically connected to the corresponding LED driver 691.

The line widths of the

common wirings

681a, 682a, 683a and the

individual wirings

681b, 682b, 683b need to be values in consideration of the following.

Maximum current amount of

common wiring

681a, 682a, 683a = number of channels of LED driver 691 x maximum current amount Imax flowing through one light emitting element body 8
Maximum current amount of

individual wiring

681b, 682b, 683b = maximum current amount Imax flowing through one light emitting element body 8
As an example, assuming that Imax = 500mA and the number of channels of the LED driver 691 = 4, the required line width is
Line width of

common wiring

681a, 682a, 683a = 0.5mm x 4 = 2mm
Line width of

individual wiring

681b, 682b, 683b = 0.5mm
At this time, assuming that the wiring interval is 0.2 mm, the minimum wiring width of the wiring portions 681,682,683 is 2 mm + (4 × 0.5 mm) + (4 × 0.2 mm) = 4.8 mm. Become.

Here, if it is considered that all channels of the LED driver 691 will not be lit at once by the lighting pattern control, the line width of the common wiring 681a can be changed to the following.

As an example, assuming that Imax = 500mA and the maximum number of simultaneous lighting of the LED driver 691 = 3, the required line width is
Line width of common wiring 681a = 0.5 mm x 3 = 1.5 mm
At this time, assuming that the wiring interval is 0.2 mm, the minimum wiring width of the wiring portion 681 is 1.5 mm + (4 × 0.5 mm) + (4 × 0.2 mm) = 4.3 mm.

In the present disclosure, in consideration of the above, the degree of freedom in the arrangement of the light emitting element 8 is increased by arranging the wiring portion 681 capable of narrowing the line width in the portion where the light emitting element 8 is desired to be densely arranged. Hereinafter, specific arrangement examples of the

wiring portions

681, 682, 683 in the light emitting substrate 68 will be described with reference to FIGS. 7 and 8A to 8C.

As described above, in the lighting pattern control of the present embodiment, paying attention to the fact that only three light emitting element bodies 8 are simultaneously lit in the vertical direction at the maximum, a plurality of light emitting element bodies 8 are united by the number of channels of the LED driver 691 (4 Group by individual). Specifically, it is divided into a first group G1 in which three or less light emitting element bodies 8 may be simultaneously lit and a second group G2 in which four light emitting element bodies 8 may be simultaneously lit. Here, the wiring portion of the first group G1 is referred to as the first wiring portion 681, and the wiring portion of the second group G2 is referred to as the second wiring portion 682. In this embodiment, a third group G3 composed of three light emitting element bodies 8 which are fractions is generated. Since the number of simultaneous lights of the third group G3 is the same as that of the first group G1, the common wiring 683a of the third wiring unit 683, which is the wiring unit of the third group G3, is the same as the common wiring 681a of the first wiring unit 681. The line width is applied.

Since the first wiring unit 681 of the first group G1 has a maximum number of simultaneous lightings of 3 for the light emitting element body 8, the common wiring 681a is larger than that of the second wiring unit 682 having a maximum number of simultaneous lightings of 4 for the light emitting element body 8. The wire width and the wiring width of the entire first wiring portion 681 can be reduced.

As shown in FIG. 7, the light emitting substrate 68 of the present embodiment includes seven first group G1, one second group G2, and one third group G3.

Each of the seven first group G1s includes four light emitting element bodies 8 arranged in the vertical direction (wiring wiring direction), and is arranged in parallel in the horizontal direction. The distance between the light emitting element bodies 8 in the wiring wiring direction has a high degree of freedom, and the four light emitting element bodies 8 can be densely arranged. On the other hand, the interval in the direction orthogonal to the wiring wiring direction of the light emitting element body 8 is affected by the wiring width of the first wiring unit 681 because the first wiring unit 681 is interposed between the light emitting element bodies 8. Therefore, by narrowing the wiring width of the first wiring unit 681 as described above, it is possible to narrow the interval in the direction orthogonal to the wiring wiring direction of the light emitting element body 8 and arrange the light emitting element bodies 8 densely. become. Even in the first wiring portion 681 of the first group G1, the portion allocated outside the arrangement region of the light emitting element body 8 does not affect the arrangement interval of the light emitting element body 8, so that the wiring width is increased. You may.

One second group G2 includes four light emitting element bodies 8 arranged in the horizontal direction (wiring wiring direction), and is arranged so as to be vertically adjacent to one end side of the four first group G1s. The distance between the light emitting element body 8 belonging to the second group G2 and the light emitting element body 8 belonging to the first group G1 is affected by the wiring width of the second wiring unit 682. In the present embodiment, three individual wirings 682b are arranged between the light emitting element body 8 belonging to the second group G2 and the light emitting element body 8 belonging to the first group G1 and outside the arrangement region of the light emitting element body 8. By arranging one individual wiring 682b and the common wiring 682a, the distance between the light emitting element body 8 belonging to the second group G2 and the light emitting element body 8 belonging to the first group G1 is narrowed.

One third group G3 includes three light emitting element bodies 8 arranged in the horizontal direction (wiring wiring direction), and is arranged so as to be vertically adjacent to one end side of the three first group G1s. The distance between the light emitting element body 8 belonging to the third group G3 and the light emitting element body 8 belonging to the first group G1 is affected by the wiring width of the third wiring unit 683. In the present embodiment, two individual wirings 683b are arranged between the light emitting element body 8 belonging to the third group G3 and the light emitting element body 8 belonging to the first group G1, and outside the arrangement region of the light emitting element body 8. By arranging one individual wiring 683b and common wiring 683a, the distance between the light emitting element body 8 belonging to the third group G3 and the light emitting element body 8 belonging to the first group G1 is narrowed.

Although each embodiment has been described in detail above, it is not limited to a specific embodiment, and various modifications and changes can be made within the scope described in the claims. It is also possible to combine all or a plurality of the components of the above-described embodiment.

For example, in the above-described embodiment, as the plurality of light emitting element bodies 8 arranged in an array, a plurality of light emitting element bodies 8 arranged in a rectangular matrix in the horizontal and vertical directions are exemplified. The plurality of light emitting element bodies 8 arranged may be a plurality of light emitting element bodies 8 arranged in a row. Further, the array does not have to be regular, and the shape of the entire array is not limited to a rectangle and may be a circle or the like.

Further, the first group G1 is premised on the configuration including the light emitting element body 8 which is not lit at the same time in the first control, but is composed of only the light emitting element body 8 which is not lit in the first control. It may have been.

1 Head-up display 2 Case 3 TFT panel unit 4 Mirror 5 Mirror 6 Backlight unit 8 Light emitting element body 9 Instrument panel 21 Heat dissipation part 31 TFT holder 32 TFT panel 33 Diffusion sheet 34 TFT cover 61 Lens cover 62 First lens spring 63 Condensing lens 64 Diffusing plate 65 Lens holder 66 Second lens spring 67 Lens array 68 Light emitting board 69 Control board 90 Screw 611 Opening 612 Claw part 641 Through hole 650 Pin part 671 Collimeter part 681 First wiring part 681a Common wiring 681b Individual Wiring 682 2nd wiring part 682a Common wiring 682b Individual wiring 683 3rd wiring part 683a Common wiring 683b Individual wiring 684 Connector 685 Connector 691 LED driver 692 Control unit G1 1st group G2 2nd group G3 3rd group VC Vehicle WS Windshield Glass S detector

Claims

A plurality of light emitting element bodies (8) arranged in an array and including a plurality of light emitting element bodies (8) of the first group (G1) and a plurality of light emitting element bodies (8) of the second group (G2). ,
The common wiring (681a) commonly electrically connected to the plurality of light emitting element bodies (8) of the first group (G1) and the plurality of light emitting element bodies (8) of the first group (G1), respectively. The first wiring section (681) including the individual wiring (681b) electrically connected to the
The common wiring (682a) commonly electrically connected to the plurality of light emitting element bodies (8) of the second group (G2) and the plurality of light emitting element bodies (8) of the second group (G2), respectively. A second wiring unit (682) including an individual wiring (682b) electrically connected to the
A control unit (692) that controls the plurality of light emitting element bodies (8) via the first wiring unit (681) and the second wiring unit (682) is included.
The control unit (692) can execute the first control of simultaneously lighting only a part of the plurality of light emitting element bodies (8) among the plurality of light emitting element bodies (8).
The plurality of light emitting element bodies (8) of the first group (G1) are lighting devices including the light emitting element bodies (8) that are not lit by the first control.
The plurality of light emitting element bodies (8) of the first group (G1) are a light emitting element body (8) that can be lit by the first control and a light emitting element body (8) that is not lit by the first control. )
The lighting device according to claim 1, wherein the plurality of light emitting element bodies (8) of the second group (G2) are composed of only the light emitting element body (8) that can be lit by the first control.
The lighting device according to claim 2, wherein the first wiring unit (681) has a narrower line width of the common wiring (681a) than the second wiring unit (682).
The lighting device according to claim 2, wherein the first wiring unit (681) has a smaller overall minimum width than the second wiring unit (682).
The plurality of light emitting element bodies (8) of the first group (G1) are arranged in the first direction.
The plurality of light emitting element bodies (8) of the second group (G2) are arranged in the second direction orthogonal to the first direction.
A claim that one of the plurality of light emitting element bodies (8) of the first group (G1) and one of the plurality of light emitting element bodies (8) of the second group (G2) are adjacent to each other in the first direction. Item 4. The lighting device according to item 4.
The light emitting element body (8) is composed of one or more LEDs.
The common wiring (681a) of the first wiring unit (681) is electrically connected to either the anode or the cathode of each LED belonging to the first group (G1), and is of the first wiring unit (681). The individual wiring (681b) is electrically connected to the anode or the cathode of each LED belonging to the first group (G1).
The common wiring (682a) of the second wiring unit (682) is electrically connected to one of the anodes and cathodes of each LED belonging to the second group (G2), and is of the second wiring unit (682). The lighting device according to any one of claims 1 to 4, wherein the individual wiring (682b) is electrically connected to the other of the anode or the cathode of each LED belonging to the second group (G2). ..
The lighting device (6) according to any one of claims 1 to 6 and
A display (32) that emits display light when illuminated by the lighting device (6),
Reflecting mirrors (4,5) that reflect the display light,
A head-up display including a transmission reflection unit (WS) that transmits and reflects the display light.
A lens (3) that distributes light between the lighting device (6) and the display (32) so that each light emitting element (8) of the lighting device (6) illuminates the entire display (32). 63, 64, 67) and
Further equipped with a detection unit (S) for detecting the viewpoint of the occupant of the vehicle (VC),
The seventh aspect of the invention, wherein the control unit (692) determines a plurality of light emitting element bodies (8) to be simultaneously lit by the first control according to the viewpoint of an occupant of the vehicle (VC). Head-up display.