JP2018167807A - Vehicular display device - Google Patents

Abstract

To provide a vehicular display device that can suppress an increase in cost.SOLUTION: A vehicular display device 100 includes: a head-up display part for displaying a virtual image by projecting display light L to a member to be projected 210; and a meter display part 160 for displaying vehicle information. The vehicular display device 100 also includes: a meter control part for controlling the meter display part 160; an outside light sensor for detecting outside light in order to adjust light intensity of display light L in accordance with outside light; and a circuit board 150 to which the meter control part and the outside light sensor are mounted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle display device.

  As a vehicle display device, a head-up display (HUD) device as disclosed in Patent Document 1 is known. The vehicle display device disclosed in Patent Document 1 includes an external light sensor, and has a function of detecting the illuminance in front of the vehicle with the external light sensor and adjusting the luminance of the display image according to the detected illuminance.

  In order to detect the illuminance in front of the vehicle, the ambient light sensor is disposed on the ambient light sensor substrate on the upper part of the apparatus where ambient light is easily captured. On the other hand, a control board on which a control unit for controlling a display that outputs display light is disposed inside the apparatus together with the display.

JP-A-6-144081

  In the vehicle display device disclosed in Patent Document 1, the HUD device and the external light sensor have substrates separately. In other words, in this vehicle display device, in addition to the control board for controlling the display, an external light sensor substrate for detecting external light is required separately, so that the number of parts constituting the vehicle display device can be reduced. As a result, the assembly cost and the parts cost increased, resulting in an increase in cost.

  In addition, even when the HUD device is installed in the vehicle, various meters for notifying various vehicle information (for example, a display for an instrument and a circuit board on which an instrument control unit for controlling the instrument display is mounted) At least an instrument display unit) may be installed together. Here, it can be said that the display device for a vehicle having the instrument display unit and the HUD device has a configuration in which the instrument display unit and the external light sensor have substrates separately. In other words, in the vehicle display device having the instrument display unit and the HUD device, in addition to the circuit board for controlling the instrument display unit, an external light sensor substrate for detecting external light is separately required. Since the number of parts constituting the vehicular display device is increased, the assembling cost and the parts cost are increased, which causes an increase in cost.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle display device capable of suppressing an increase in cost.

In order to achieve the above object, a vehicle display device according to the present invention includes:
A head-up display unit that displays a virtual image by projecting display light onto a projection target member; and
An instrument display for displaying vehicle information;
An instrument control unit for controlling the instrument display unit;
An outside light sensor for detecting the outside light in order to adjust the light intensity of the display light according to the outside light; and
A circuit board on which the instrument control unit and the external light sensor are mounted.

  ADVANTAGE OF THE INVENTION According to this invention, the display apparatus for vehicles which can suppress a cost raise can be provided.

It is sectional drawing which cut | disconnected the display apparatus for vehicles which concerns on embodiment of this invention by xz plane in the position where a display can be seen. It is a disassembled perspective view of the display apparatus for vehicles shown in FIG. It is a top view of the lower case of the display apparatus for vehicles shown in FIG. It is a bottom view of the upper case of the display apparatus for vehicles shown in FIG. It is sectional drawing which cut | disconnected the xz plane in the position which the surroundings of an external light sensor can see the vehicle display apparatus shown in FIG. It is the top view which removed the upper case and light shielding member of the display apparatus for vehicles shown in FIG. It is the perspective view which removed the upper case of the display apparatus for vehicles shown in FIG. (A) is a rear surface perspective view of the vehicle display device shown in FIG. 1, and (b) is a front perspective view of the vehicle display device shown in FIG. It is a block diagram of the control part of the display apparatus for vehicles shown in FIG.

  Hereinafter, a display device for a vehicle according to an embodiment of the present invention will be described with reference to the drawings. In the following description, in order to facilitate understanding, xyz orthogonal coordinates are set such that the longitudinal direction of the vehicle is the x-axis direction, the left-right direction viewed from the vehicle occupant is the y-axis direction, and the height direction is the z-axis direction. Reference is made accordingly. Note that “front” is the forward direction of the vehicle in the + x-axis direction, right is the right direction viewed from the occupant, the + y-axis direction, and the upward direction is the + z-axis direction.

  As shown in FIG. 1, the vehicle display device 100 according to the present embodiment is mounted in, for example, a dashboard of a vehicle 300 and emits display light L toward a windshield 210 that is a projection target member of the vehicle 300. . The viewer U who is a driver receives the display light L reflected by the windshield 210 and visually recognizes the virtual image V seen through the windshield 210. Moreover, the display apparatus 100 for vehicles is equipped with 1 or several measuring instruments in the rear end part, and notifies a measured value etc.

  As shown in FIGS. 1 and 5, the vehicle display device 100 includes a housing 110, a display 120, a plane mirror 130, a concave mirror 140, a circuit board 150, an instrument display unit 160, and an external light sensor. 170, a light guide passage 180, a light shielding member 190, and a concave mirror drive mechanism 200. The vehicle display device 100 emits the display light L from the display device 120 to the plane mirror 130, reflects the display light L with the plane mirror 130, and then reflects the display light L with the concave mirror 140. The display light L reflected by the concave mirror 140 passes through a light transmitting portion 115a of an upper case 111 (described later) of the housing 110 and is reflected by the windshield 210. The display 120, the plane mirror 130, the concave mirror 140, and the head-up display control unit 12 constitute a head-up display unit.

  The housing 110 is made of, for example, black synthetic resin. As shown in FIG. 2, the housing 110 includes a lower case 112 that is formed in a box shape that opens upward, and an upper case 111 that is attached to the upper portion of the lower case 112 so as to close the lower case 112 from above. Is provided. Moreover, the housing | casing 110 is provided with the fitting part 113 with which the instrument display part 160 fits back. The fitting part 113 has a cylindrical shape surrounding the instrument display part 160.

  As shown in FIG. 1, an opening 114 a that allows the display light L reflected by the concave mirror 140 to pass outside (outside) the housing 110 is provided on the front upper surface of the upper case 111. A light-transmitting portion 115a for dust prevention that transmits the display light L to the outside of the housing 110 is disposed on the front upper surface of the upper case 111 so as to cover the opening 114a. The translucent part 115a is, for example, laser welded to the opening part 114a.

  The upper case 111 has a fitting upper part 113 a that constitutes a part of the fitting part 113. As shown in FIG. 2, the fitting upper portion 113 a has a substantially U shape so as to cover the upper surface and both side surfaces of the meter display portion 160. Further, the upper case 111 has a display insertion hole 114b through which a display 120 described later is inserted. The indicator insertion hole 114b has a rectangular shape that is long in the left-right direction, and is positioned between the fitting upper portion 113a and the opening 114a, as shown in FIG. In addition, the indicator insertion hole 114b is positioned so as to face the plane mirror 130 in the vertical direction.

  The upper case 111 has a light shielding wall 115 in the opening 114a. The light shielding wall 115 is inclined downward from the rear edge of the opening 114a toward the front. The light shielding wall 115 prevents a phenomenon (washout) in which sunlight is incident on the display device 120 from the opening 114a and the virtual image V becomes difficult to see. As shown in FIG. 5, the light shielding wall 115 has a light guide hole 114 c that penetrates the light shielding wall 115 in the thickness direction. The light guide hole 114 c is a hole for taking outside light between the light shielding wall 115 and the circuit board 150 in the housing 110.

  As shown in FIGS. 1 and 6, the lower case 112 accommodates a plane mirror 130, a concave mirror 140, and the like. As shown in FIG. 6, the lower case 112 includes a lower bottom surface 112a located below the lower case 112, an upper bottom surface 117 located above the lower bottom surface 112a, and a space between the lower bottom surface 112a and the upper bottom surface 117. Partition walls 118a and 118b to be connected.

  As shown in FIGS. 3 and 6, the upper bottom surface 117 of the lower case 112 has a fitting lower portion 113b that constitutes the fitting portion 113 together with the fitting upper portion 113a, and a connector holding portion 116a that holds a connector portion 151 described later. And a raised portion 116 for fixing the circuit board 150 in a standing state. The fitting lower portion 113b is located on the rear end side of the upper bottom surface 117, and supports the instrument display portion 160 located in the fitting portion 113 from the lower surface. The upright portion 116 is positioned in front of the fitting lower portion 113b, extends perpendicularly to the upper bottom surface 117, and has a rectangular plate shape that is long in the left-right direction (Y direction). The connector holding portion 116a has a rectangular cylindrical shape in which the side wall on the rear side (circuit board 150 side) is omitted. A cable hole 116b communicating with the outside is formed in the upper bottom surface 117 in the connector holding portion 116a.

  The lower case 112 is positioned in front of the lower bottom surface 112a, and a pair of bearings 119a and 119b that rotatably support the concave mirror 140, and a plane mirror fixing portion 112c that is positioned behind the lower bottom surface 112a and fixes the plane mirror 130. And comprising. The pair of bearings 119a and 119b have a concave shape that rotatably accommodates the pair of shafts 141a and 141b of the concave mirror 140, and are spaced apart from each other so as to sandwich the concave mirror 140 in the longitudinal direction.

  The bottom of the plane mirror fixing portion 112c becomes higher toward the rear. The plane mirror fixing portion 112c has claws 112d, 112e, 112f, and 112g that fix the lower end portion and side surfaces of the plane mirror 130.

  As shown in FIG. 3, the lower case 112 has locking holes 112h, 112i, 112j, 112k, 112l formed on the outer peripheral surface thereof. The hooks 111a, 111b, 111c, 111d, and 111e of the upper case 111 shown in FIG. 4 are locked in these locking holes 112h, 112i, 112j, 112k, and 112l. As a result, the lower case 112 is fixed to the upper case 111.

  Further, the lower case 112 is formed with locking holes 112m and 112n for fixing the instrument display portion 160 to both ends in the left and right direction of the fitting lower portion 113b.

  As shown in FIG. 1, the display device 120 includes a backlight 121 that emits light, a liquid crystal panel that receives the light from the backlight 121 and generates display light L that represents an image, a DMD (Digital Micro Mirror Device), and the like. The display element 123 is provided. The backlight 123 is mainly composed of a light source 124 and a lens member 125, for example. The display device 120 is provided on the side of the translucent portion 115a and between an instrument display portion 160 and a translucent portion 115a described later. In addition, the display element 123 positioned below the display device 120 is positioned so as to have the same height as the translucent portion 115a in the vertical direction. The display device 120 emits the display light L indicating the display image downward toward the lower right plane mirror 130 behind the lower case 112. The upper part of the display device 120 is inserted through the display device insertion hole 114b in the upper left of the upper case 111. At this time, the display device 120 is located behind the light transmitting portion 115a and is located at the same height as the light transmitting portion 115a in the vertical direction.

  The display device 120 includes a heat dissipation unit 122 that dissipates heat from the display device 120. The heat radiation part 122 is made of, for example, a metal and has a rectangular plate shape. The heat radiating part 122 is exposed to the outside of the vehicle display device 100 from the indicator insertion hole 114 b of the upper case 111 by being positioned on the upper surface of the indicator 120. The lower part of the display device 120 is supported by a light shielding member 190 described later.

  As shown in FIG. 6, the plane mirror 130 is a substantially trapezoidal plate-like body disposed on the plane mirror fixing portion 112 c at the lower right rear of the lower case. As shown in FIG. 1, the plane mirror 130 reflects the display light L incident from the display 120 at the upper right of the upper case 111 to the concave mirror 140 at the front of the lower case 112. The plane mirror 130 has a metal reflective film formed on one surface of a flat substrate made of synthetic resin, glass, or the like. The plane mirror 130 corresponds to a reflecting mirror.

  As shown in FIG. 6, the concave mirror 140 has a substantially rectangular plate-like mirror surface that is curved along its longitudinal direction. As shown in FIG. 1, the concave mirror 140 reflects the display light L from the plane mirror 130 toward the windshield 210. The concave mirror 140 has a metal reflecting film formed on one surface of a base material made of synthetic resin, glass or the like. The plane mirror 130 and the concave mirror 140 constitute an optical system that guides the display light L from the display device 120 to the windshield 210 (translucent portion 115a) constituting the projection target member. Not only the plane mirror 130 but also the concave mirror 140 may correspond to a reflecting mirror.

  As shown in FIG. 6, the concave mirror 140 includes a main body portion 140a having the mirror surface and shafts 141a and 141b located at both ends of the main body portion 140a. The tip portion of the shaft 141a is rotatably fitted to the bearing 119a shown in FIG. 3, and the tip portion of the shaft 141b is rotatably fitted to the bearing 119b.

  The concave mirror driving mechanism 200 includes a motor 144 that is fixed to the lower bottom surface 112a on the front left side of the lower case 112, and a conversion unit 145 that rotates the concave mirror 140 about its axes 141a and 141b by driving the motor 144. Prepare.

  The circuit board 150 is, for example, a printed circuit board. The control unit 10 shown in FIG. 9, the external light sensor 170 shown in FIG. 5, and the instrument light source 161 shown in FIG. 8A are mounted on the circuit board 150.

  The control unit 10 includes a CPU (Central Processing Unit), a memory, and the like, and executes a control program stored in the memory. 9, the control unit 10 functionally includes a motor control unit 11 that controls the motor 144, a head-up display control unit 12 that controls the display 120, and an instrument display unit 160 (an instrument light source 161). And an instrument control unit 13 for controlling the liquid crystal display panel 162).

  The motor control unit 11 controls the inclination angle of the concave mirror 140 through driving of the motor 144 shown in FIG.

  The instrument control unit 13 controls the instrument light source 161 and the liquid crystal display panel 162 shown in FIG. Specifically, the instrument control unit 13 generates information to be displayed on the instrument display unit 160 based on signals and information received from the sensor group and vehicle information received from an ECU (Electronic Control Unit) or the like. The vehicle information includes vehicle speed, travel distance, gear position, battery voltage, fuel remaining amount, water pressure, water temperature, oil pressure, oil temperature, warning information, and the like. The warning information includes, for example, a speed warning, a water temperature / oil temperature warning, a water pressure / hydraulic warning, a remaining fuel warning, and the like.

  The instrument control unit 13 sets on / off and output of the instrument light source 161 based on the detection result of the external light sensor 170. For example, the instrument control unit 13 sets the output of the instrument light source 161 to be larger as the light intensity of external light is higher, and turns off the instrument light source 161 when the output is equal to or greater than the reference value.

  The head-up display (HUD) control unit 12 controls the backlight 121 and the display element 123 of the display device 120. For example, the HUD control unit 12 controls the display device 120 to adjust the light emission luminance of the display light L according to the illuminance data ahead of the vehicle 300 acquired from the external light sensor 170 described later. More specifically, the HUD control unit 12 displays the display floor of the display image (virtual image) V as the illuminance indicated by the illuminance data from the external light sensor 170 increases, that is, as the illuminance in front of the vehicle 300 increases. A process of causing the display device 120 to adjust the light emission luminance (light intensity) of the display light L is performed so that the tone becomes higher.

  As shown in FIG. 1, the circuit board 150 is erected along the vertical direction between the display device 120 and a meter display unit 160 described later. The circuit board 150 is located on the front side of the instrument display unit 160, in other words, on the back side of the display surface of the instrument display unit 160.

  As shown in FIG. 6, the circuit board 150 includes a connector portion 151 on the front surface thereof. The connector part 151 is held in the connector holding part 116a. A cable (not shown) is connected to the connector 151 via a cable hole 116b shown in FIG.

  The external light sensor 170 is composed of, for example, a photodiode that detects the intensity of light. As shown in FIG. 5, the external light sensor 170 is mounted on the first surface 152 of the circuit board 150 that faces the light transmitting portion 115 a. The outside light sensor 170 is located at a position facing the light guide hole 114c of the light shielding wall 115 in the front-rear direction, and is located inside a light guide passage 180 described later. The external light sensor 170 outputs the detected external light intensity to the HUD control unit 12.

  The light shielding member 190 is made of, for example, black synthetic resin. As shown in FIGS. 1 and 7, the light shielding member 190 includes a substantially rectangular plate-shaped blind portion 191 that faces the lower bottom surface 112a, and concave mirror holding portions 193 and 193 that hold the shafts 141a and 141b of the concave mirror 140 from above. Is provided. The blind unit 191 prevents external light from being mixed with the display light L. That is, the blind part 191 partitions the space where the circuit board 150 is located from the space through which the light emitted from the display 120 passes.

  As shown in FIG. 2, the blind portion 191 has a rectangular light transmission window 194 that allows the display light L from the display device 120 to pass through, and a plurality of display device supports that hold the display device 120 around the light transmission window 194. Part 192 is formed. The display support portion 192 is formed in a column shape extending upward.

  As shown in FIG. 7, the concave mirror holding portions 193 and 193 are positioned on the left and right sides of the blind portion 191 and press the shafts 141a and 141b from above so that the shafts 141a and 141b of the concave mirror 140 do not fall off the bearings 119a and 119b.

  As shown in FIGS. 5 and 8A, the instrument light source 161 is composed of a plurality of LEDs, and is mounted on the second surface 153 of the circuit board 150 facing the instrument display unit 160.

  In addition to the instrument light source 161 described above, the instrument display unit 160 includes a liquid crystal display panel (LCD: Liquid Crystal Display) 162 in which a plurality of pixels are formed in a matrix, and an instrument casing 163. The liquid crystal display panel 162 forms a display image (image) based on the drawing data generated by the drawing circuit that is a part of the instrument control unit 13 described above.

  The instrument housing 163 is formed of a light-shielding resin and has a cylindrical shape surrounding the outer periphery of the instrument display unit 160 as shown in FIGS. 5 and 8B. The instrument housing 163 is located at the peripheral edge of the second surface 153 of the circuit board 150. As shown in FIG. 2, the fitting portion 113 is located on the outer peripheral surface of the instrument housing 163. As shown in FIG. 8B, the instrument housing 163 includes a pair of board holding latching claws 164a and 164b that sandwich the circuit board 150 from the longitudinal direction, and the lower case 112 shown in FIG. And a pair of lower case fixing latching claws 165a and 165b fitted into the retaining holes 112m and 112n. The lower case fixing locking claws 165a and 165b are located at both ends in the left-right direction on the lower surface of the instrument housing 163 and extend downward.

As shown in FIG. 5, the light guide passage 180 as the light guide member is formed in a substantially cylindrical shape by, for example, black synthetic resin. The light guide passage 180 extends along the front-rear direction between the external light sensor 170 and the light guide hole 114 c of the light shielding wall 115. The diameter of the light guide passage 180 increases toward the rear, and the rear end of the light guide passage 180 is fixed to the first surface 152. The front end of the light guide passage 180 faces the light guide hole 114 c of the light shielding wall 115 of the upper case 111.
The light guide passage 180 guides the external light in front of the vehicle 300 that has entered through the translucent portion 115 a toward the external light sensor 170.

  According to this vehicle display device 100, since the instrument control unit 13 and the external light sensor 170 are mounted on the circuit board 150, a dedicated external light sensor mounting specially required as a component of the vehicle display device is conventionally required. Since the external light sensor substrate is not required separately, the number of components can be reduced, and an increase in cost can be suppressed. Further, since the HUD control unit 12 is also mounted on the circuit board 150, the instrument control unit 13, the external light sensor 170, and the HUD control unit 12 are mounted on the circuit board 150, and the components of the vehicle display device As the above-mentioned external light sensor substrate, which has been conventionally required, becomes unnecessary, the number of components can be reduced, and the cost increase can be suppressed.

  The circuit board 150 of the vehicle display device 100 is erected between the display device 120 and the instrument display unit 160. Thereby, the dead space on the back side of the instrument display unit 160 can be used effectively, and the mounting property of the vehicle display device 100 on the vehicle is improved. Further, since the circuit board 150 is erected between the display 120 and the instrument display unit 160, wiring from the instrument control unit 13 to the instrument display unit 160 and wiring from the HUD control unit 12 to the display unit 120. Can be shortened.

  Moreover, since the display apparatus 100 for vehicles is providing the indicator 120 between the instrument display part 160 and the translucent part 115a, the dead space of the back side of the instrument display part 160 can be utilized effectively, Mountability of the vehicle display device 100 on a vehicle is improved. Further, since the housing is integrated by the head-up display unit and the instrument display unit 160, the vehicle display device 100 can be miniaturized.

  Since the external light sensor 170 of the vehicle display device 100 is mounted on the first surface 152 of the circuit board 150 facing the light transmitting portion 115a, the external light sensor 170 can acquire external light with higher detection accuracy.

  Since the vehicular display device 100 includes the light guide member 180 that guides the external light incident through the translucent portion 115a toward the external light sensor 170, the external light sensor 170 transmits the external light with higher detection accuracy. You can get it. In addition, since external light can be guided to a desired position through the light guide member 180, the degree of freedom of arrangement of the external light sensor 170 on the circuit board 150 is improved.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various applications and modifications are possible.

  In the present embodiment, the light guide passage 180 is used, but a light guide may be used instead of the light guide passage 180. The light guide is preferably made of a translucent resin such as PMMA (PolyMethylMethacrylate).

  In the present embodiment, the instrument display unit 160 is a liquid crystal display device. However, the instrument display unit 160 includes a pointer and a pointer-type instrument display including a display plate having a measurement value display unit such as a scale indicated by the pointer. The part may be used.

  In the present embodiment, the instrument display unit 160 is integrated with the vehicle display device, but the instrument display unit 160 may not be integrated with the vehicle display device.

  In the present embodiment, the light guide passage 180 is provided, but the light guide passage 180 may not be provided. In this case, the external light sensor 170 is provided at a position facing the light guide hole 114 c of the light shielding wall 115.

  In the present embodiment, the HUD control unit 12 is provided on the circuit board 150, but the HUD control unit 12 may not be provided on the circuit board 150. In this case, for example, the HUD control unit 12 may be provided on another substrate.

  In the above embodiment, the circuit board 150 is erected between the display 120 and the instrument display unit 160, but the position and orientation of the circuit board 150 are not limited thereto. For example, the circuit board 150 may be placed on the light shielding member 190.

  Further, the positional relationship between the display device 120 and the plane mirror 130 may be opposite to the positional relationship in the present embodiment.

  In the present embodiment, the projection member is a windshield, but the projection member may be a combiner or the like.

  In the present embodiment, the vehicle display device 100 is mounted on the vehicle, but is not limited to being mounted on the vehicle, and may be mounted on an arbitrary moving body such as an airplane or a ship.

  In the present embodiment, the HUD control unit 12 of the circuit board 150 adjusts the emission luminance of the display light L according to the illuminance data from the external light sensor 170, but the HUD control unit 12 performs the illuminance from the external light sensor 170. It is good also as a structure which can adjust the light emission luminance of the display light L according to data, and the viewer U can adjust the light emission luminance of the display light L himself.

DESCRIPTION OF SYMBOLS 10 Control part 11 Motor control part 12 Head up display (HUD) control part 13 Instrument control part 100 Display apparatus for vehicles 110 Housing | casing 111 Upper case 112 Lower case 113 Fitting part 115 Light-shielding wall 115a Translucent part 120 Display 130 Flat mirror 140 Concave mirror 150 Circuit board 152 First surface 153 Second surface 160 Instrument display unit 161 Light source for instrument 170 External light sensor 180 Light guide path (light guide member)
200 Concave mirror drive mechanism 210 Windshield (projected member)
220 Optical system 300 Vehicle L Display light U Viewer

Claims (7)

A head-up display unit that displays a virtual image by projecting display light onto a projection target member; and
An instrument display for displaying vehicle information;
An instrument control unit for controlling the instrument display unit;
An outside light sensor for detecting the outside light in order to adjust the light intensity of the display light according to the outside light; and
A circuit board on which the instrument control unit and the external light sensor are mounted;
A display device for a vehicle. The head-up display unit includes a display that emits the display light, an optical system that projects the display light, and a head-up display control unit that controls the head-up display unit through the display,
On the circuit board, the instrument control unit, the external light sensor, and the head-up display control unit are mounted.
The vehicular display device according to claim 1. The circuit board is erected between the indicator and the instrument display unit.
The vehicle display device according to claim 2. A housing for accommodating the head-up display unit;
A translucent part that is provided on the upper surface of the housing and transmits the display light to the outside of the housing;
The indicator is provided between the instrument display unit and the translucent unit.
The vehicle display device according to claim 2, wherein the display device is a vehicle display device. The outside light sensor is mounted on a first surface of the circuit board facing the light transmitting portion, and acquires outside light from the light transmitting portion.
The vehicular display device according to claim 4. A light guide member that guides external light incident through the light transmitting portion toward the external light sensor;
The vehicle display device according to claim 4, wherein the display device is a vehicle display device. Mounted on the second surface of the circuit board facing the instrument display unit, further comprising an instrument light source for lighting the instrument display unit,
The instrument light source turns on / off the instrument light source based on the intensity of external light detected by the external light sensor.
The vehicular display device according to any one of claims 1 to 6.

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