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WO2019203149A1 - Vehicular display device - Google Patents

Vehicular display device Download PDF

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Publication number
WO2019203149A1
WO2019203149A1 PCT/JP2019/015955 JP2019015955W WO2019203149A1 WO 2019203149 A1 WO2019203149 A1 WO 2019203149A1 JP 2019015955 W JP2019015955 W JP 2019015955W WO 2019203149 A1 WO2019203149 A1 WO 2019203149A1
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WO
WIPO (PCT)
Prior art keywords
driver
display
display device
hot mirror
infrared light
Prior art date
Application number
PCT/JP2019/015955
Other languages
French (fr)
Japanese (ja)
Inventor
康之 藤塚
彰大 後藤
Original Assignee
日本精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Publication of WO2019203149A1 publication Critical patent/WO2019203149A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/22—Display screens

Definitions

  • the present invention relates to a vehicle display device.
  • a device for monitoring a driver with a camera is known.
  • a vehicle user recognition device described in Patent Document 1 includes a half mirror that is inclined with respect to the driver's line-of-sight direction, a camera that is located behind the half mirror and photographs the driver via the half mirror, And a display LCD (Liquid Crystal Display) that radiates image light toward the driver via a half mirror.
  • a display LCD Liquid Crystal Display
  • This invention is made in view of the said actual condition, and aims at providing the display apparatus for vehicles with the driver monitoring function which can be comprised more compactly.
  • a display device for a vehicle displays a vehicle information and has a display surface that is directly viewed by a driver, an infrared light source that irradiates the driver with infrared light, and the display surface.
  • An optical panel that is inclined with respect to the display surface at a position that overlaps at least a portion of the light, reflects at least a portion of infrared light, and transmits at least a portion of visible light, and a position that does not overlap the display surface.
  • an infrared camera provided on a side of the optical panel so as to receive infrared light reflected from the optical panel.
  • the vehicle display device can be configured more compactly.
  • FIG. 2 is a cross-sectional view taken along line A-A ′ of FIG. 1. It is a top view of the camera unit concerning a 1st embodiment of the present invention.
  • 1 is a block diagram of a vehicle display device according to a first embodiment of the present invention. It is a front view of the display apparatus for vehicles concerning a 1st embodiment of the present invention.
  • (A)-(c) which concerns on 1st Embodiment of this invention is a front view which shows a sub display area.
  • FIG. 8 is a sectional view taken along line B-B ′ of FIG. 7.
  • FIG. 10 is a sectional view taken along line C-C ′ of FIG. 9. It is a front view of the display apparatus for vehicles concerning the modification of the present invention.
  • a vehicle display device according to a first embodiment of the present invention will be described with reference to FIGS.
  • the direction approaching the driver is defined as the front direction and the direction away from the driver is defined as the rear direction when viewed from the driver viewing the vehicle display device.
  • the vehicle display device 1 includes a driver monitoring device 10 that monitors a driver and an instrument device 20 that displays vehicle information.
  • the instrument device 20 includes a display device 21, a cover glass 22, a circuit board 23, and a case 24.
  • the case 24 is formed of a light-shielding resin, accommodates the display device 21 and the circuit board 23, and has a box shape that opens forward.
  • the circuit board 23 is a printed board on which various electronic components such as an LED (Light Emitting Diode) (not shown) and a control unit 80 (see FIG. 4) are mounted.
  • the display 21 is composed of a TFT (Thin Film Transistor) liquid crystal panel controlled by the control unit 80, and is positioned in front of the circuit board 23 so as to be parallel to the circuit board 23.
  • the display 21 has a screen 21a that receives light from an LED (not shown) and displays an image including various vehicle information such as vehicle speed.
  • the screen 21a has a long rectangle in the vehicle width direction.
  • the cover glass 22 is formed in a transparent plate shape with inorganic glass, and is positioned so as to close the opening of the case 24.
  • a light shielding layer 22a is formed in a range excluding the screen 21a of the display 21.
  • the light shielding layer 22a is formed in a U shape or a concave shape that opens downward as viewed from the driver.
  • the light shielding layer 22 a is formed by printing black ink on the front surface 22 b of the cover glass 22.
  • the driver monitoring apparatus 10 includes a camera unit 11, a light shielding wall 12, a hot mirror 13, and a visible light cut unit 14.
  • the light shielding wall 12 is formed of a light shielding resin and surrounds the hot mirror 13 from the periphery so as to open toward the camera unit 11.
  • the light shielding wall 12 extends perpendicularly from the front surface 22b of the cover glass 22 and is located at the lower center of the front surface 22b of the cover glass 22 in the vehicle width direction.
  • the light shielding wall 12 includes an upper wall portion 12 a along the upper surface of the hot mirror 13 and two side wall portions 12 b along two side surfaces of the hot mirror 13.
  • the upper wall portion 12a extends in the vehicle width direction.
  • the two side wall portions 12b extend downward from both ends of the upper wall portion 12a so as to form an obtuse angle with respect to the upper wall portion 12a.
  • the hot mirror 13 has a function of transmitting visible light and reflecting infrared light. Specifically, the hot mirror 13 reflects infrared light from the camera unit 11 toward the driver and reflects infrared light from the driver's face toward the camera unit 11. In addition, since the hot mirror 13 transmits visible light, the driver can visually recognize the portion of the screen 21 a of the display 21 that overlaps the hot mirror 13.
  • the hot mirror 13 has a trapezoidal plate shape, and is held in the light shielding wall 12 in a state where the hot mirror 13 is inclined with respect to the front surface 22b of the cover glass 22 at an angle ⁇ shown in FIG.
  • the hot mirror 13 is inclined so that the lower end of the hot mirror 13 faces the lower end of the cover glass 22 and is separated from the front surface 22 b of the cover glass 22 as it goes from the lower end to the upper end of the hot mirror 13. If the angle ⁇ is too small, the distance between the hot mirror 13 and the screen 21a may be too close, causing double images. If the angle ⁇ is too large, the infrared light from the camera unit 11 is directed toward the driver. Reflection may be difficult. From such a viewpoint, the angle ⁇ is preferably set to 30 ° to 45 °, and is set to 31 ° in the present embodiment.
  • the hot mirror 13 includes a transparent plate 13a and a wavelength selective reflection film 13b.
  • the transparent plate 13a is made of acrylic or glass.
  • the wavelength selective reflection film 13b is laminated on the transparent plate 13a at a position closer to the screen 21a than the transparent plate 13a.
  • the wavelength selective reflection film 13b is formed by laminating thin films having different refractive indexes. For example, titanium oxide (TiO2) as a high refraction material, and silicon dioxide (SiO2) as a low refraction material are alternately laminated.
  • TiO2 titanium oxide
  • SiO2 silicon dioxide
  • the selective reflection performance at a wavelength of 5 nm is obtained. In the present embodiment, the higher the visible light (360 nm to 400 nm) transmittance in the wavelength selective reflection film 13b, the better.
  • the transmittance is preferably 50% or more. Further, the higher the reflectance in the infrared region (830 nm or more) in the wavelength selective reflection film 13b, the better.
  • the reflectance is preferably 50% or more, for example, 90% or more.
  • the camera unit 11 is provided between the steering of the vehicle and the display 21. In this case, as shown in FIG. Located in the steering column 5. As shown in FIG. 3, the camera unit 11 includes an infrared camera 11a and a pair of infrared light sources 11L. The camera unit 11 is formed so that the infrared camera 11a and the infrared light source 11L are integrated.
  • the pair of infrared light sources 11L are arranged so as to sandwich the infrared camera 11a in the vehicle width direction.
  • the infrared light source 11 ⁇ / b> L includes an infrared LED, and irradiates infrared light toward the lower surface of the hot mirror 13. The infrared light reaches the driver's face by reflecting the lower surface of the hot mirror 13.
  • the infrared camera 11 a has a photographic lens 11 b and is arranged so that the photographic lens 11 b faces the lower surface of the hot mirror 13.
  • the infrared light applied to the driver's face reflects the driver's face, and the reflected light of the infrared light reflects the lower surface of the hot mirror 13 and reaches the photographing lens 11b. Therefore, the infrared camera 11a can photograph the driver's face illuminated by infrared light.
  • the visible light cut unit 14 is a visible light cut filter that cuts visible light out of light and transmits infrared light.
  • the visible light cut portion 14 is positioned so as to close a hole formed in the steering column 5 between the infrared camera 11 a and the hot mirror 13.
  • the visible light cut unit 14 can suppress the infrared camera 11a from being visually recognized by a driver.
  • the vehicle display device 1 includes a control unit 80, a display 21, an infrared camera 11a, and an infrared light source 11L.
  • the control unit 80 includes a ROM (Read Only Memory) in which the operation program of the control unit 80 is stored, a CPU (Central Processing Unit) that executes the operation process of the control unit 80 by executing the stored operation program, and a display A graphic controller that generates an image to be displayed on the screen 21a, and a RAM (Random Access Memory) used as a work area such as a CPU.
  • the control unit 80 includes a display control unit 81 and a driver monitoring control unit 82 as functions.
  • the display control unit 81 is based on information from an in-vehicle ECU (Electronic Control Unit) (not shown), as shown in FIG. 5, the sub display area 21b that overlaps the hot mirror 13 and the main display that does not overlap the hot mirror 13 in the screen 21a.
  • the vehicle information having different contents is displayed in the area 21c.
  • the display control unit 81 displays vehicle information related to the vehicle speed, the inter-vehicle distance, and the charge / discharge state of the in-vehicle battery in the main display area 21c. Further, the display control unit 81 displays independent information different from the main display area 21c in the sub display area 21b. In this example, the display control unit 81 displays information indicating the driving mode of the vehicle in the sub display area 21b.
  • the display control unit 81 notifies the sub display area 21b that the vehicle is ready for automatic driving, as shown in FIG. As shown in b), the automatic driving in-execution notification 16 for notifying that the automatic driving function is functioning normally, or notifying that the automatic driving function is canceled as shown in FIG.
  • the automatic driving authority transfer notice 17 is displayed.
  • the automatic driving preparation notification 15 includes a character display “AP Ready” and has a blue background.
  • the automatic operation in-execution notification 16 includes a character display “AUTO PILOT” and has a green background.
  • the automatic driving authority transfer notification 17 is composed of characters “TAKE OVER” and has a yellow background.
  • the driver monitoring control unit 82 irradiates infrared light through the infrared light source 11L and acquires image data captured by the infrared camera 11a. Based on the acquired image data, the driver monitoring control unit 82 detects the driver's line-of-sight direction, the presence or absence of drowsiness, or whether or not the driver can be switched from automatic driving to manual driving.
  • the display control unit 81 may display the detection result by the driver monitoring control unit 82 on the screen 21a.
  • the vehicle display device 1 with a driver monitoring function displays vehicle information, a display 21 having a screen 21a that is an example of a display surface that is directly viewed by the driver, and an infrared light source that irradiates the driver with infrared light.
  • 11L and a hot mirror 13 that is an example of an optical panel that is inclined with respect to the screen 21a at a position overlapping with a part of the screen 21a, reflects at least part of infrared light, and transmits at least part of visible light.
  • an infrared camera 11a provided on the side of the hot mirror 13 so as to receive the infrared light reflected from the hot mirror 13 from the driver side at a position that does not overlap the screen 21a.
  • the infrared camera 11a is provided on the side of the hot mirror 13, the depth direction (rear direction) of the vehicular display device 1 can be configured more compactly. Moreover, since the sub display area 21b overlapping the hot mirror 13 in the screen 21a is also visible by the driver, even if the hot mirror 13 is provided for driver monitoring, the display area of the screen 21a is damaged. Is suppressed. Further, since the infrared camera 11a is provided on the side of the hot mirror 13, the infrared camera 11a is suppressed from being visually recognized by the driver. Furthermore, by using the infrared camera 11a and the infrared light source 11L, the driver can be monitored accurately and without being noticed by the driver even in a dark situation.
  • the hot mirror 13 is located at the lower end of the screen 21a in the height direction, and tilts away from the screen 21a as it approaches the center O (see FIG. 2) of the screen 21a. According to this configuration, the hot mirror 13 overlaps a part of the screen 21a. Therefore, the hot mirror 13 can be reduced in size and it can suppress that the visibility of the screen 21a is impaired by the hot mirror 13.
  • FIG. 1 The hot mirror 13 is located at the lower end of the screen 21a in the height direction, and tilts away from the screen 21a as it approaches the center O (see FIG. 2) of the screen 21a. According to this configuration, the hot mirror 13 overlaps a part of the screen 21a. Therefore, the hot mirror 13 can be reduced in size and it can suppress that the visibility of the screen 21a is impaired by the hot mirror 13.
  • the vehicle display device 1 includes a light shielding wall 12 that stands on the screen 21a and surrounds the hot mirror 13 from the periphery so as to open toward the infrared camera 11a.
  • the light shielding wall 12 prevents external light from entering the optical path between the infrared camera 11a, the hot mirror 13, and the driver. Therefore, the monitoring accuracy in the driver monitoring device 10 can be increased. Further, the light shielding wall 12 can suppress the reflection of light at the edge portion of the hot mirror 13.
  • the infrared camera 11 a is provided in the steering column 5. According to this configuration, the space in the steering column 5 can be used effectively. Therefore, the vehicle display device 1 can be configured more compactly. Further, the infrared camera 11a can be hidden from the driver's line of sight. Furthermore, since the pair of infrared light sources 11L are also provided in the steering column 5, the space in the steering column 5 can be used more effectively.
  • the vehicle display device 1 includes a display control unit 81 that displays independent information in the sub display area 21b that overlaps the hot mirror 13 when viewed from the driver in the screen 21a.
  • a display control unit 81 that displays independent information in the sub display area 21b that overlaps the hot mirror 13 when viewed from the driver in the screen 21a.
  • the driver monitoring device 10 is provided at the upper end of the screen 21 a of the display 21.
  • the instrument device 20 includes a plurality of indicators 40 that perform a warning by turning on an icon indicating the state of the vehicle.
  • the plurality of indicators 40 are arranged along the vehicle width direction.
  • the indicator 40 is an example of a display surface.
  • the indicator 40 includes a light source 42 composed of LEDs and a light guide tube 41 that guides light from the light source 42 to the cover glass 22.
  • the light source 42 is provided on the surface of the circuit board 23 that faces the cover glass 22.
  • the light guide tube 41 is formed in a cylindrical shape with a light-shielding resin and extends between the circuit board 23 and the cover glass 22.
  • the light shielding layer 22a is not applied only to the portion showing the icon in the light shielding layer 22a. In other words, only the part showing the icon in the light shielding layer 22a is cut out. Thereby, the light from the light source 42 is irradiated to the site
  • the hot mirror 13 is positioned so as to overlap the upper portion of the screen 21a and the indicator 40 when viewed from the driver.
  • the hot mirror 13 is tilted away from the front surface 22b of the cover glass 22 as it goes downward.
  • the vehicle display device 1 includes a visor 50 that covers the instrument device 20 from above.
  • the visor 50 is formed of a light-shielding resin and is curved along the vehicle width direction to form a hollow shape.
  • the camera unit 11 is provided in the visor 50. According to this configuration, the space in the visor 50 can be used effectively.
  • the hot mirror 13 is positioned so as to overlap a part of the screen 21a of the display 21. However, as shown in FIGS. 9 and 10, the hot mirror 13 is positioned over the entire area of the screen 21a. It may be.
  • the camera unit 11 is formed so that the infrared camera 11a and the infrared light source 11L are integrated.
  • the infrared camera 11a and the infrared light source 11L may be provided at positions separated from each other.
  • the pair of infrared light sources 11L may be arranged so as to sandwich the screen 21a of the display device 21 in the vehicle width direction.
  • Each infrared light source 11 ⁇ / b> L may be mounted on the circuit board 23 similarly to the light source 42 of FIG. 8 and surrounded by the light guide tube 41.
  • the light shielding layer 22a is not formed in the portion that receives the infrared light from the infrared light source 11L. In this configuration, since it is not necessary to reflect the infrared light from the infrared light source 11L by the hot mirror 13, the size of the hot mirror 13 in the vehicle width direction can be reduced.
  • the driver monitoring device 10 includes the hot mirror 13, but may include a half mirror instead of the hot mirror 13.
  • the display device 21 is composed of a TFT liquid crystal panel, but may be composed of an organic EL display (OELD: Organic Electro-Luminescence Display). Further, the display device 21 may include an analog pointer meter that drives a pointer by a motor.
  • OELD Organic Electro-Luminescence Display
  • the driver monitoring device 10 is provided at the upper end or the lower end of the screen 21a, but is not limited thereto, and may be provided at the right end or the left end of the screen 21a.
  • the vehicular display device 1 includes the pair of infrared light sources 11L, but the number of the infrared light sources 11L is not limited thereto, and may be one or three or more.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

A vehicular display device with a driver-monitoring function is provided that can be configured more compactly. The vehicular display device 1 comprises: a display 21 that displays vehicle information, and has a screen 21a that is one example of a display screen directly visible by a driver; an infrared light source that radiates infrared light on the driver; a hot mirror 13 that is inclined in relation to the screen 21a at a position overlapping a portion of the screen 21a, the hot mirror being one example of an optical panel that reflects at least a portion of the infrared light and transmits at least a portion of visible light; and an infrared camera 11a provided in a position not overlapping the screen 21a and to the side of the hot mirror 13 so as to receive the infrared light reflected from the hot mirror 13 from the driver side.

Description

車両用表示装置Vehicle display device
　本発明は、車両用表示装置に関する。 The present invention relates to a vehicle display device.
　従来から、ドライバーをカメラによりモニタリングする装置が知られている。例えば、特許文献１に記載の車両用ユーザ認識装置は、ドライバーの視線方向に対して傾斜するハーフミラーと、ハーフミラーの後方に位置しハーフミラーを介してドライバーを撮影するカメラと、ハーフミラーの上方に位置し画像光をハーフミラーを介してドライバーに向けて照射する表示用ＬＣＤ（Liquid Crystal Display）と、を備える。 Conventionally, a device for monitoring a driver with a camera is known. For example, a vehicle user recognition device described in Patent Document 1 includes a half mirror that is inclined with respect to the driver's line-of-sight direction, a camera that is located behind the half mirror and photographs the driver via the half mirror, And a display LCD (Liquid Crystal Display) that radiates image light toward the driver via a half mirror.
特開２０００－１６８５０２号公報JP 2000-168502 A
　上記特許文献１に記載の構成においては、ハーフミラー、カメラ及び表示用ＬＣＤが互いに離れた位置に設けられるため、装置の大型化を招いていた。特に、カメラがハーフミラーの後方に位置するため、奥行き方向において装置の大型化を招いていた。 In the configuration described in Patent Document 1, since the half mirror, the camera, and the display LCD are provided at positions apart from each other, the apparatus is increased in size. In particular, since the camera is located behind the half mirror, the size of the apparatus is increased in the depth direction.
　本発明は、上記実状を鑑みてなされたものであり、よりコンパクトに構成できるドライバーモニタリング機能付きの車両用表示装置を提供することを目的とする。 This invention is made in view of the said actual condition, and aims at providing the display apparatus for vehicles with the driver monitoring function which can be comprised more compactly.
　上記目的を達成するため、本発明に係る車両用表示装置は、車両情報を表示し、ドライバーにより直視される表示面を有する表示器と、赤外線光をドライバーに照射する赤外線光源と、前記表示面の少なくとも一部に重なる位置にて前記表示面に対して傾斜し、赤外線光の少なくとも一部を反射させ、可視光の少なくとも一部を透過させる光学パネルと、前記表示面に重ならない位置であって、前記光学パネルを反射した赤外線光を受光するように前記光学パネルの側方に設けられる赤外線カメラと、を備える。 In order to achieve the above object, a display device for a vehicle according to the present invention displays a vehicle information and has a display surface that is directly viewed by a driver, an infrared light source that irradiates the driver with infrared light, and the display surface. An optical panel that is inclined with respect to the display surface at a position that overlaps at least a portion of the light, reflects at least a portion of infrared light, and transmits at least a portion of visible light, and a position that does not overlap the display surface. And an infrared camera provided on a side of the optical panel so as to receive infrared light reflected from the optical panel.
　本発明によれば、車両用表示装置において、よりコンパクトに構成できる。 According to the present invention, the vehicle display device can be configured more compactly.
本発明の第１実施形態に係る車両用表示装置の正面図である。It is a front view of the display apparatus for vehicles concerning a 1st embodiment of the present invention. 図１のＡ－Ａ’線の断面図である。FIG. 2 is a cross-sectional view taken along line A-A ′ of FIG. 1. 本発明の第１実施形態に係るカメラユニットの平面図である。It is a top view of the camera unit concerning a 1st embodiment of the present invention. 本発明の第１実施形態に係る車両用表示装置のブロック図である。1 is a block diagram of a vehicle display device according to a first embodiment of the present invention. 本発明の第１実施形態に係る車両用表示装置の正面図である。It is a front view of the display apparatus for vehicles concerning a 1st embodiment of the present invention. 本発明の第１実施形態に係る（ａ）～（ｃ）はサブ表示エリアを示す正面図である。(A)-(c) which concerns on 1st Embodiment of this invention is a front view which shows a sub display area. 本発明の第２実施形態に係る車両用表示装置の正面図である。It is a front view of the display apparatus for vehicles concerning a 2nd embodiment of the present invention. 図７のＢ－Ｂ’線の断面図である。FIG. 8 is a sectional view taken along line B-B ′ of FIG. 7. 本発明の変形例に係る車両用表示装置の正面図である。It is a front view of the display apparatus for vehicles concerning the modification of the present invention. 図９のＣ－Ｃ’線の断面図である。FIG. 10 is a sectional view taken along line C-C ′ of FIG. 9. 本発明の変形例に係る車両用表示装置の正面図である。It is a front view of the display apparatus for vehicles concerning the modification of the present invention.
　（第１実施形態）
　本発明に係る車両用表示装置の第１実施形態について図１～図６を参照しつつ説明する。なお、以下では、車両用表示装置を視認するドライバーから見て、ドライバーに近づく方向を前方向と規定し、ドライバーから離れる方向を後方向と規定する。 (First embodiment)
A vehicle display device according to a first embodiment of the present invention will be described with reference to FIGS. In the following description, the direction approaching the driver is defined as the front direction and the direction away from the driver is defined as the rear direction when viewed from the driver viewing the vehicle display device.
　図１及び図２に示すように、車両用表示装置１は、ドライバーをモニタリングするドライバーモニタリング装置１０と、車両情報を表示する計器装置２０と、を備える。 As shown in FIGS. 1 and 2, the vehicle display device 1 includes a driver monitoring device 10 that monitors a driver and an instrument device 20 that displays vehicle information.
　計器装置２０は、表示器２１と、カバーガラス２２と、回路基板２３と、ケース２４と、を備える。 The instrument device 20 includes a display device 21, a cover glass 22, a circuit board 23, and a case 24.
　ケース２４は、遮光性の樹脂により形成され、表示器２１及び回路基板２３を収容し、前方に向けて開口する箱状をなす。
　回路基板２３は、図示しないＬＥＤ（Light Emitting Diode）及び制御部８０（図４参照）等の各種電子部品が実装されたプリント基板である。 The case 24 is formed of a light-shielding resin, accommodates the display device 21 and the circuit board 23, and has a box shape that opens forward.
The circuit board 23 is a printed board on which various electronic components such as an LED (Light Emitting Diode) (not shown) and a control unit 80 (see FIG. 4) are mounted.
　表示器２１は、制御部８０により制御されるＴＦＴ（Thin Film Transistor）液晶パネルから構成され、回路基板２３と平行をなすように回路基板２３よりも前側に位置する。表示器２１は、図示しないＬＥＤからの光を受けて車速等の各種車両情報を含む画像を表示する画面２１ａを有する。画面２１ａは、車幅方向に長い長方形をなす。 The display 21 is composed of a TFT (Thin Film Transistor) liquid crystal panel controlled by the control unit 80, and is positioned in front of the circuit board 23 so as to be parallel to the circuit board 23. The display 21 has a screen 21a that receives light from an LED (not shown) and displays an image including various vehicle information such as vehicle speed. The screen 21a has a long rectangle in the vehicle width direction.
　カバーガラス２２は、無機ガラスにより透明な板状に形成され、ケース２４の開口部を塞ぐように位置する。カバーガラス２２の前面２２ｂには、表示器２１の画面２１ａを除く範囲に遮光層２２ａが形成されている。遮光層２２ａは、ドライバーから見て、下方に向けて開口するコ字状又は凹字状に形成される。遮光層２２ａは、カバーガラス２２の前面２２ｂに黒色系のインクが印刷されることにより形成される。 The cover glass 22 is formed in a transparent plate shape with inorganic glass, and is positioned so as to close the opening of the case 24. On the front surface 22b of the cover glass 22, a light shielding layer 22a is formed in a range excluding the screen 21a of the display 21. The light shielding layer 22a is formed in a U shape or a concave shape that opens downward as viewed from the driver. The light shielding layer 22 a is formed by printing black ink on the front surface 22 b of the cover glass 22.
　図１及び図２に示すように、ドライバーモニタリング装置１０は、カメラユニット１１と、遮光壁１２と、ホットミラー１３と、可視光カット部１４と、を備える。 As shown in FIGS. 1 and 2, the driver monitoring apparatus 10 includes a camera unit 11, a light shielding wall 12, a hot mirror 13, and a visible light cut unit 14.
　遮光壁１２は、遮光性の樹脂により形成され、カメラユニット１１に向けて開口するようにホットミラー１３を周囲から囲む。遮光壁１２は、カバーガラス２２の前面２２ｂから垂直に延び、カバーガラス２２の前面２２ｂにおける車幅方向の中央の下部に位置する。遮光壁１２は、図１に示すように、ホットミラー１３の上面に沿う上壁部１２ａと、ホットミラー１３の２つの側面に沿う２つの側壁部１２ｂと、を備える。上壁部１２ａは車幅方向に延びる。２つの側壁部１２ｂは、それぞれ上壁部１２ａの両端から上壁部１２ａに対して鈍角をなすように下方へ延びる。 The light shielding wall 12 is formed of a light shielding resin and surrounds the hot mirror 13 from the periphery so as to open toward the camera unit 11. The light shielding wall 12 extends perpendicularly from the front surface 22b of the cover glass 22 and is located at the lower center of the front surface 22b of the cover glass 22 in the vehicle width direction. As shown in FIG. 1, the light shielding wall 12 includes an upper wall portion 12 a along the upper surface of the hot mirror 13 and two side wall portions 12 b along two side surfaces of the hot mirror 13. The upper wall portion 12a extends in the vehicle width direction. The two side wall portions 12b extend downward from both ends of the upper wall portion 12a so as to form an obtuse angle with respect to the upper wall portion 12a.
　ホットミラー１３は、可視光を透過し、赤外線光を反射する機能を有する。詳しくは、ホットミラー１３は、カメラユニット１１からの赤外線光をドライバーに向けて反射するとともに、ドライバーの顔からの赤外線光をカメラユニット１１に向けて反射する。また、ホットミラー１３は可視光を透過するため、ドライバーは表示器２１の画面２１ａのうちホットミラー１３に重なる部分を視認できる。 The hot mirror 13 has a function of transmitting visible light and reflecting infrared light. Specifically, the hot mirror 13 reflects infrared light from the camera unit 11 toward the driver and reflects infrared light from the driver's face toward the camera unit 11. In addition, since the hot mirror 13 transmits visible light, the driver can visually recognize the portion of the screen 21 a of the display 21 that overlaps the hot mirror 13.
　詳しくは、ホットミラー１３は、台形板状をなし、カバーガラス２２の前面２２ｂに対して図２に示す角度αにて傾斜した状態で遮光壁１２内に保持される。言い換えると、ホットミラー１３は、ホットミラー１３の下端がカバーガラス２２の下端に対向し、ホットミラー１３の下端から上端に向かうにつれてカバーガラス２２の前面２２ｂから離れるように傾斜する。この角度αは小さすぎると、ホットミラー１３と画面２１ａの距離が近すぎて二重像の発生原因となるおそれがあり、角度αは大きすぎると、カメラユニット１１からの赤外線光をドライバーに向けて反射することが困難となるおそれがある。このような観点から、角度αは、好ましくは、３０°～４５°に設定され、本実施形態の場合、３１°に設定される。 Specifically, the hot mirror 13 has a trapezoidal plate shape, and is held in the light shielding wall 12 in a state where the hot mirror 13 is inclined with respect to the front surface 22b of the cover glass 22 at an angle α shown in FIG. In other words, the hot mirror 13 is inclined so that the lower end of the hot mirror 13 faces the lower end of the cover glass 22 and is separated from the front surface 22 b of the cover glass 22 as it goes from the lower end to the upper end of the hot mirror 13. If the angle α is too small, the distance between the hot mirror 13 and the screen 21a may be too close, causing double images. If the angle α is too large, the infrared light from the camera unit 11 is directed toward the driver. Reflection may be difficult. From such a viewpoint, the angle α is preferably set to 30 ° to 45 °, and is set to 31 ° in the present embodiment.
　詳しくは、図２に示すように、ホットミラー１３は、透明板１３ａと、波長選択反射膜１３ｂと、を備える。
　透明板１３ａは、アクリル又はガラスにより形成される。
　波長選択反射膜１３ｂは、透明板１３ａよりも画面２１ａに近い位置に、透明板１３ａに積層される。波長選択反射膜１３ｂは、屈折率の異なる薄膜を積層したもので、高屈折材料として、例えば酸化チタン（ＴｉＯ２）、低屈折材料として例えば二酸化ケイ素（ＳｉＯ２）等が交互に積層されることで所定の波長の選択反射性能が得られる。本実施形態では、波長選択反射膜１３ｂにおける、可視光（３６０ｎｍ～４００ｎｍ）の透過率が高いほど好ましく、例えば、透過率が５０％以上であることが好ましい。また、波長選択反射膜１３ｂにおける、赤外線領域（８３０ｎｍ以上）の反射率が高いほど好ましく、例えば、反射率が５０％以上、例えば９０％以上であることが好ましい。 Specifically, as shown in FIG. 2, the hot mirror 13 includes a transparent plate 13a and a wavelength selective reflection film 13b.
The transparent plate 13a is made of acrylic or glass.
The wavelength selective reflection film 13b is laminated on the transparent plate 13a at a position closer to the screen 21a than the transparent plate 13a. The wavelength selective reflection film 13b is formed by laminating thin films having different refractive indexes. For example, titanium oxide (TiO2) as a high refraction material, and silicon dioxide (SiO2) as a low refraction material are alternately laminated. The selective reflection performance at a wavelength of 5 nm is obtained. In the present embodiment, the higher the visible light (360 nm to 400 nm) transmittance in the wavelength selective reflection film 13b, the better. For example, the transmittance is preferably 50% or more. Further, the higher the reflectance in the infrared region (830 nm or more) in the wavelength selective reflection film 13b, the better. For example, the reflectance is preferably 50% or more, for example, 90% or more.
　カメラユニット１１は、車両のステアリングと表示器２１との間に設けられ、この場合、図２に示すように、カメラユニット１１は、ホットミラー１３の側方、本例ではホットミラー１３の下方におけるステアリングコラム５内に位置する。カメラユニット１１は、図３に示すように、赤外線カメラ１１ａと、一対の赤外線光源１１Ｌと、を備える。カメラユニット１１は、赤外線カメラ１１ａ及び赤外線光源１１Ｌが一体となるように形成される。 The camera unit 11 is provided between the steering of the vehicle and the display 21. In this case, as shown in FIG. Located in the steering column 5. As shown in FIG. 3, the camera unit 11 includes an infrared camera 11a and a pair of infrared light sources 11L. The camera unit 11 is formed so that the infrared camera 11a and the infrared light source 11L are integrated.
　一対の赤外線光源１１Ｌは、車幅方向において赤外線カメラ１１ａを挟み込むように配置される。赤外線光源１１Ｌは、赤外線ＬＥＤからなり、赤外線光をホットミラー１３の下面に向けて照射する。赤外線光は、ホットミラー１３の下面を反射することによりドライバーの顔に到達する。 The pair of infrared light sources 11L are arranged so as to sandwich the infrared camera 11a in the vehicle width direction. The infrared light source 11 </ b> L includes an infrared LED, and irradiates infrared light toward the lower surface of the hot mirror 13. The infrared light reaches the driver's face by reflecting the lower surface of the hot mirror 13.
　赤外線カメラ１１ａは、図２に示すように、撮影レンズ１１ｂを有し、撮影レンズ１１ｂがホットミラー１３の下面に対向するように配置される。ドライバーの顔に照射された赤外線光は、ドライバーの顔を反射し、その赤外線光の反射光はホットミラー１３の下面を反射して撮影レンズ１１ｂに到達する。よって、赤外線カメラ１１ａは、赤外線光に照らされたドライバーの顔を撮影できる。 As shown in FIG. 2, the infrared camera 11 a has a photographic lens 11 b and is arranged so that the photographic lens 11 b faces the lower surface of the hot mirror 13. The infrared light applied to the driver's face reflects the driver's face, and the reflected light of the infrared light reflects the lower surface of the hot mirror 13 and reaches the photographing lens 11b. Therefore, the infrared camera 11a can photograph the driver's face illuminated by infrared light.
　可視光カット部１４は、光のうち可視光をカットし、赤外線光を透過する可視光カットフィルターである。可視光カット部１４は、赤外線カメラ１１ａとホットミラー１３の間にステアリングコラム５に形成される孔を塞ぐように位置する。可視光カット部１４により、赤外線カメラ１１ａがドライバーにより視認されることを抑制できる。 The visible light cut unit 14 is a visible light cut filter that cuts visible light out of light and transmits infrared light. The visible light cut portion 14 is positioned so as to close a hole formed in the steering column 5 between the infrared camera 11 a and the hot mirror 13. The visible light cut unit 14 can suppress the infrared camera 11a from being visually recognized by a driver.
　次に、図４を参照しつつ、車両用表示装置１の電気的な構成について説明する。
　車両用表示装置１は、制御部８０と、表示器２１と、赤外線カメラ１１ａと、赤外線光源１１Ｌと、を備える。
　制御部８０は、制御部８０の動作プログラムが記憶されるＲＯＭ（Read Only Memory）、記憶される動作プログラムを実行することで制御部８０の動作処理を実行するＣＰＵ（Central Processing Unit）、表示器２１の画面２１ａに表示させる画像を生成するグラフィックコントローラ、及びＣＰＵ等のワークエリアとして利用されるＲＡＭ（Random Access Memory）等を備える。制御部８０は、機能として、表示制御部８１と、ドライバーモニタリング制御部８２と、を備える。 Next, the electrical configuration of the vehicle display device 1 will be described with reference to FIG.
The vehicle display device 1 includes a control unit 80, a display 21, an infrared camera 11a, and an infrared light source 11L.
The control unit 80 includes a ROM (Read Only Memory) in which the operation program of the control unit 80 is stored, a CPU (Central Processing Unit) that executes the operation process of the control unit 80 by executing the stored operation program, and a display A graphic controller that generates an image to be displayed on the screen 21a, and a RAM (Random Access Memory) used as a work area such as a CPU. The control unit 80 includes a display control unit 81 and a driver monitoring control unit 82 as functions.
　表示制御部８１は、図示しない車載ＥＣＵ（Electronic Control Unit）からの情報に基づき、図５に示すように、画面２１ａのうちホットミラー１３と重なるサブ表示エリア２１ｂ及びホットミラー１３と重ならないメイン表示エリア２１ｃにそれぞれ異なる内容の車両情報を表示する。詳しくは、表示制御部８１は、メイン表示エリア２１ｃに車速、車間距離及び車載バッテリの充放電状態に係る車両情報を表示する。また、表示制御部８１は、サブ表示エリア２１ｂにメイン表示エリア２１ｃとは別の独立した情報を表示する。本例では、表示制御部８１は、サブ表示エリア２１ｂに、車両の運転モードを示す情報を表示する。具体的には、表示制御部８１は、サブ表示エリア２１ｂに、図６（ａ）に示すように、車両が自動運転可能な状態になったことを通知する自動運転準備通知１５、図６（ｂ）に示すように、自動運転機能が正常に機能していることを通知する自動運転実行中通知１６、又は図６（ｃ）に示すように、自動運転機能が解除される旨を通知する自動運転権限移譲通知１７を表示する。本例では、自動運転準備通知１５は「ＡＰ　Ｒｅａｄｙ」という文字表示からなり、背景が青色である。自動運転実行中通知１６は「ＡＵＴＯ　ＰＩＬＯＴ」という文字表示からなり、背景が緑色である。自動運転権限移譲通知１７は「ＴＡＫＥ　ＯＶＥＲ」という文字表示からなり、背景が黄色である。 The display control unit 81 is based on information from an in-vehicle ECU (Electronic Control Unit) (not shown), as shown in FIG. 5, the sub display area 21b that overlaps the hot mirror 13 and the main display that does not overlap the hot mirror 13 in the screen 21a. The vehicle information having different contents is displayed in the area 21c. Specifically, the display control unit 81 displays vehicle information related to the vehicle speed, the inter-vehicle distance, and the charge / discharge state of the in-vehicle battery in the main display area 21c. Further, the display control unit 81 displays independent information different from the main display area 21c in the sub display area 21b. In this example, the display control unit 81 displays information indicating the driving mode of the vehicle in the sub display area 21b. Specifically, the display control unit 81 notifies the sub display area 21b that the vehicle is ready for automatic driving, as shown in FIG. As shown in b), the automatic driving in-execution notification 16 for notifying that the automatic driving function is functioning normally, or notifying that the automatic driving function is canceled as shown in FIG. The automatic driving authority transfer notice 17 is displayed. In this example, the automatic driving preparation notification 15 includes a character display “AP Ready” and has a blue background. The automatic operation in-execution notification 16 includes a character display “AUTO PILOT” and has a green background. The automatic driving authority transfer notification 17 is composed of characters “TAKE OVER” and has a yellow background.
　ドライバーモニタリング制御部８２は、赤外線光源１１Ｌを通じて赤外線光を照射するとともに、赤外線カメラ１１ａにより撮像された画像データを取得する。ドライバーモニタリング制御部８２は、取得した画像データに基づき、ドライバーの視線方向、眠気の有無、又はドライバーが自動運転から手動運転に切り替え可能な状態にあるか否かを検出する。表示制御部８１は、ドライバーモニタリング制御部８２による検出結果を画面２１ａに表示してもよい。 The driver monitoring control unit 82 irradiates infrared light through the infrared light source 11L and acquires image data captured by the infrared camera 11a. Based on the acquired image data, the driver monitoring control unit 82 detects the driver's line-of-sight direction, the presence or absence of drowsiness, or whether or not the driver can be switched from automatic driving to manual driving. The display control unit 81 may display the detection result by the driver monitoring control unit 82 on the screen 21a.
　（効果）
　以上、説明した第１実施形態によれば、以下の効果を奏する。 (effect)
As mentioned above, according to 1st Embodiment demonstrated, there exist the following effects.
　（１）ドライバーモニタリング機能付きの車両用表示装置１は、車両情報を表示し、ドライバーにより直視される表示面の一例である画面２１ａを有する表示器２１と、赤外線光をドライバーに照射する赤外線光源１１Ｌと、画面２１ａの一部に重なる位置にて画面２１ａに対して傾斜し、赤外線光の少なくとも一部を反射させ、可視光の少なくとも一部を透過させる光学パネルの一例であるホットミラー１３と、画面２１ａに重ならない位置であって、ドライバー側からのホットミラー１３を反射した赤外線光を受光するようにホットミラー１３の側方に設けられる赤外線カメラ１１ａと、を備える。
　この構成によれば、赤外線カメラ１１ａはホットミラー１３の側方に設けられるため、車両用表示装置１の奥行き方向（後方向）をよりコンパクトに構成することができる。
　また、画面２１ａのうちホットミラー１３と重なるサブ表示エリア２１ｂもドライバーにより視認可能であるため、ドライバーのモニタリングのためにホットミラー１３を設けた場合であっても、画面２１ａの表示領域を損なうことが抑制される。
　また、赤外線カメラ１１ａはホットミラー１３の側方に設けられるため、ドライバーにより赤外線カメラ１１ａが視認されることが抑制される。
　さらに、赤外線カメラ１１ａ及び赤外線光源１１Ｌを利用することにより、暗い状況下であっても、正確に、かつドライバーに気づかれることなく、ドライバーのモニタリングが可能となる。 (1) The vehicle display device 1 with a driver monitoring function displays vehicle information, a display 21 having a screen 21a that is an example of a display surface that is directly viewed by the driver, and an infrared light source that irradiates the driver with infrared light. 11L and a hot mirror 13 that is an example of an optical panel that is inclined with respect to the screen 21a at a position overlapping with a part of the screen 21a, reflects at least part of infrared light, and transmits at least part of visible light. And an infrared camera 11a provided on the side of the hot mirror 13 so as to receive the infrared light reflected from the hot mirror 13 from the driver side at a position that does not overlap the screen 21a.
According to this configuration, since the infrared camera 11a is provided on the side of the hot mirror 13, the depth direction (rear direction) of the vehicular display device 1 can be configured more compactly.
Moreover, since the sub display area 21b overlapping the hot mirror 13 in the screen 21a is also visible by the driver, even if the hot mirror 13 is provided for driver monitoring, the display area of the screen 21a is damaged. Is suppressed.
Further, since the infrared camera 11a is provided on the side of the hot mirror 13, the infrared camera 11a is suppressed from being visually recognized by the driver.
Furthermore, by using the infrared camera 11a and the infrared light source 11L, the driver can be monitored accurately and without being noticed by the driver even in a dark situation.
　（２）ホットミラー１３は、画面２１ａにおける高さ方向の下端部に位置し、画面２１ａの中心Ｏ（図２参照）に近づくにつれて画面２１ａから離れるように傾斜する。
　この構成によれば、ホットミラー１３は画面２１ａの一部に重なる。よって、ホットミラー１３を小型化でき、ホットミラー１３により画面２１ａの視認性が損なわれることを抑制できる。 (2) The hot mirror 13 is located at the lower end of the screen 21a in the height direction, and tilts away from the screen 21a as it approaches the center O (see FIG. 2) of the screen 21a.
According to this configuration, the hot mirror 13 overlaps a part of the screen 21a. Therefore, the hot mirror 13 can be reduced in size and it can suppress that the visibility of the screen 21a is impaired by the hot mirror 13. FIG.
　（３）車両用表示装置１は、画面２１ａに立設し、赤外線カメラ１１ａに向けて開口するようにホットミラー１３を周囲から囲む遮光壁１２を備える。
　この構成によれば、遮光壁１２により外光が、赤外線カメラ１１ａ、ホットミラー１３及びドライバーの間の光路に進入することが抑制される。よって、ドライバーモニタリング装置１０におけるモニタリング精度を高めることができる。また、遮光壁１２によりホットミラー１３のエッジ部分での光の反射を抑制できる。 (3) The vehicle display device 1 includes a light shielding wall 12 that stands on the screen 21a and surrounds the hot mirror 13 from the periphery so as to open toward the infrared camera 11a.
According to this configuration, the light shielding wall 12 prevents external light from entering the optical path between the infrared camera 11a, the hot mirror 13, and the driver. Therefore, the monitoring accuracy in the driver monitoring device 10 can be increased. Further, the light shielding wall 12 can suppress the reflection of light at the edge portion of the hot mirror 13.
　（４）赤外線カメラ１１ａはステアリングコラム５内に設けられる。
　この構成によれば、ステアリングコラム５内のスペースを有効に活用できる。よって、車両用表示装置１をよりコンパクトに構成することができる。また、ドライバーの視線から赤外線カメラ１１ａを隠すことができる。さらに、一対の赤外線光源１１Ｌもステアリングコラム５内に設けられることにより、よりステアリングコラム５内のスペースを有効に活用できる。 (4) The infrared camera 11 a is provided in the steering column 5.
According to this configuration, the space in the steering column 5 can be used effectively. Therefore, the vehicle display device 1 can be configured more compactly. Further, the infrared camera 11a can be hidden from the driver's line of sight. Furthermore, since the pair of infrared light sources 11L are also provided in the steering column 5, the space in the steering column 5 can be used more effectively.
　（５）車両用表示装置１は、画面２１ａのうちドライバーから見てホットミラー１３と重なるサブ表示エリア２１ｂに独立した情報を表示する表示制御部８１を備える。
　この構成によれば、ホットミラー１３はドライバーから見て傾斜しているため、ホットミラー１３と重なるサブ表示エリア２１ｂをホットミラー１３と重ならないメイン表示エリア２１ｃと異なる印象をドライバーに与えることができる。よって、サブ表示エリア２１ｂに表示される内容をドライバーにより確実に通知することができる。 (5) The vehicle display device 1 includes a display control unit 81 that displays independent information in the sub display area 21b that overlaps the hot mirror 13 when viewed from the driver in the screen 21a.
According to this configuration, since the hot mirror 13 is inclined as seen from the driver, the sub display area 21b overlapping the hot mirror 13 can be given an impression different from the main display area 21c not overlapping the hot mirror 13 to the driver. . Therefore, the content displayed in the sub display area 21b can be surely notified by the driver.
　（第２実施形態）
　本発明に係る車両用表示装置の第２実施形態について図７及び図８を参照しつつ説明する。本実施形態では、ドライバーモニタリング装置１０の位置が主に第１実施形態と異なる。以下、第１実施形態との相違点を中心に説明する。 (Second Embodiment)
A second embodiment of the vehicle display device according to the present invention will be described with reference to FIGS. In the present embodiment, the position of the driver monitoring device 10 is mainly different from that in the first embodiment. Hereinafter, the difference from the first embodiment will be mainly described.
　図７に示すように、ドライバーモニタリング装置１０は、表示器２１の画面２１ａの上端部に設けられる。また、計器装置２０は、車両の状態を示すアイコンを点灯させることにより警告を行う複数のインジケータ４０を備える。複数のインジケータ４０は、車幅方向に沿って並べられる。インジケータ４０は表示面の一例である。 As shown in FIG. 7, the driver monitoring device 10 is provided at the upper end of the screen 21 a of the display 21. In addition, the instrument device 20 includes a plurality of indicators 40 that perform a warning by turning on an icon indicating the state of the vehicle. The plurality of indicators 40 are arranged along the vehicle width direction. The indicator 40 is an example of a display surface.
　図８に示すように、インジケータ４０は、ＬＥＤからなる光源４２と、光源４２からの光をカバーガラス２２へと導く導光筒４１と、を備える。光源４２は、回路基板２３におけるカバーガラス２２に対向する面に設けられる。導光筒４１は、遮光性の樹脂により円筒状に形成され、回路基板２３とカバーガラス２２の間を延びる。また、遮光層２２ａのうちアイコンを示す部位のみ遮光層２２ａが施されていない。言い換えると、遮光層２２ａにおいてアイコンを示す部位のみくり抜かれている。これにより、光源４２からの光がこのアイコンを示す部位に照射されることにより、インジケータ４０をアイコンとして点灯させることができる。 As shown in FIG. 8, the indicator 40 includes a light source 42 composed of LEDs and a light guide tube 41 that guides light from the light source 42 to the cover glass 22. The light source 42 is provided on the surface of the circuit board 23 that faces the cover glass 22. The light guide tube 41 is formed in a cylindrical shape with a light-shielding resin and extends between the circuit board 23 and the cover glass 22. In addition, the light shielding layer 22a is not applied only to the portion showing the icon in the light shielding layer 22a. In other words, only the part showing the icon in the light shielding layer 22a is cut out. Thereby, the light from the light source 42 is irradiated to the site | part which shows this icon, and the indicator 40 can be lighted as an icon.
　図８に示すように、ホットミラー１３は、ドライバーから見て画面２１ａの上部及びインジケータ４０と重なるように位置する。ホットミラー１３は、下方に向かうにつれて、カバーガラス２２の前面２２ｂから遠ざかるように傾斜する。 As shown in FIG. 8, the hot mirror 13 is positioned so as to overlap the upper portion of the screen 21a and the indicator 40 when viewed from the driver. The hot mirror 13 is tilted away from the front surface 22b of the cover glass 22 as it goes downward.
　また、車両用表示装置１は、計器装置２０を上方から覆うバイザー５０を備える。バイザー５０は、遮光性の樹脂により形成され、車幅方向に沿って湾曲し中空状をなす。カメラユニット１１はバイザー５０内に設けられる。この構成によれば、バイザー５０内のスペースを有効に利用することができる。 The vehicle display device 1 includes a visor 50 that covers the instrument device 20 from above. The visor 50 is formed of a light-shielding resin and is curved along the vehicle width direction to form a hollow shape. The camera unit 11 is provided in the visor 50. According to this configuration, the space in the visor 50 can be used effectively.
（変形例）
　なお、上記各実施形態は、これを適宜変更した以下の形態にて実施することができる。 (Modification)
In addition, each said embodiment can be implemented with the following forms which changed this suitably.
　上記第２の実施形態においては、ホットミラー１３は、表示器２１の画面２１ａの一部に重なるように位置していたが、図９及び図１０に示すように、画面２１ａの全域にわたって位置していてもよい。 In the second embodiment, the hot mirror 13 is positioned so as to overlap a part of the screen 21a of the display 21. However, as shown in FIGS. 9 and 10, the hot mirror 13 is positioned over the entire area of the screen 21a. It may be.
　上記各実施形態においては、カメラユニット１１は、赤外線カメラ１１ａ及び赤外線光源１１Ｌが一体となるように形成されていたが、赤外線カメラ１１ａ及び赤外線光源１１Ｌは互いに離れた位置に設けられていてもよい。この場合、図１１に示すように、一対の赤外線光源１１Ｌは、車幅方向において表示器２１の画面２１ａを挟み込むように並べられてもよい。各赤外線光源１１Ｌは、図８の光源４２と同様に回路基板２３に実装され、導光筒４１により囲まれていてもよい。また、赤外線光源１１Ｌからの赤外線光を受ける部分には遮光層２２ａが形成されない。この構成では、赤外線光源１１Ｌからの赤外線光をホットミラー１３にて反射させる必要がないことから、ホットミラー１３の車幅方向のサイズを小さくすることができる。 In each of the above embodiments, the camera unit 11 is formed so that the infrared camera 11a and the infrared light source 11L are integrated. However, the infrared camera 11a and the infrared light source 11L may be provided at positions separated from each other. . In this case, as shown in FIG. 11, the pair of infrared light sources 11L may be arranged so as to sandwich the screen 21a of the display device 21 in the vehicle width direction. Each infrared light source 11 </ b> L may be mounted on the circuit board 23 similarly to the light source 42 of FIG. 8 and surrounded by the light guide tube 41. Further, the light shielding layer 22a is not formed in the portion that receives the infrared light from the infrared light source 11L. In this configuration, since it is not necessary to reflect the infrared light from the infrared light source 11L by the hot mirror 13, the size of the hot mirror 13 in the vehicle width direction can be reduced.
　上記各実施形態においては、ドライバーモニタリング装置１０はホットミラー１３を備えていたが、ホットミラー１３に代えてハーフミラーを備えていてもよい。 In each of the embodiments described above, the driver monitoring device 10 includes the hot mirror 13, but may include a half mirror instead of the hot mirror 13.
　上記各実施形態においては、表示器２１は、ＴＦＴ液晶パネルから構成されていたが、有機ＥＬディスプレイ（ＯＥＬＤ：Organic Electro-Luminescence Display）から構成されていてもよい。また、表示器２１は、モータにより指針を駆動させるアナログ指針計を備えていてもよい。 In each of the above embodiments, the display device 21 is composed of a TFT liquid crystal panel, but may be composed of an organic EL display (OELD: Organic Electro-Luminescence Display). Further, the display device 21 may include an analog pointer meter that drives a pointer by a motor.
　上記各実施形態においては、ドライバーモニタリング装置１０は、画面２１ａの上端部又は下端部に設けられていたが、これに限らず、画面２１ａの右端部又は左端部に設けられていてもよい。 In each of the above embodiments, the driver monitoring device 10 is provided at the upper end or the lower end of the screen 21a, but is not limited thereto, and may be provided at the right end or the left end of the screen 21a.
　上記各実施形態においては、車両用表示装置１は一対の赤外線光源１１Ｌを備えていたが、赤外線光源１１Ｌの数はこれに限らず、１つ又は３つ以上であってもよい。 In each of the above embodiments, the vehicular display device 1 includes the pair of infrared light sources 11L, but the number of the infrared light sources 11L is not limited thereto, and may be one or three or more.
１　車両用表示装置
５　ステアリングコラム
１０　ドライバーモニタリング装置
１１　カメラユニット
１１ａ　赤外線カメラ
１１ｂ　撮影レンズ
１１Ｌ　赤外線光源
１２　遮光壁
１３　ホットミラー
１３ａ　透明板
１３ｂ　波長選択反射膜
１４　可視光カット部
２０　計器装置
２１　表示器
２１ａ　画面
２１ｂ　サブ表示エリア
２１ｃ　メイン表示エリア
２２　カバーガラス
２２ａ　遮光層
２３　回路基板
２４　ケース
４０　インジケータ
５０　バイザー
８０　制御部
８１　表示制御部
８２　ドライバーモニタリング制御部 DESCRIPTION OF SYMBOLS 1 Display apparatus for vehicles 5 Steering column 10 Driver monitoring apparatus 11 Camera unit 11a Infrared camera 11b Shooting lens 11L Infrared light source 12 Light-shielding wall 13 Hot mirror 13a Transparent plate 13b Wavelength selective reflection film 14 Visible light cut part 20 Instrument apparatus 21 Indicator 21a Screen 21b Sub display area 21c Main display area 22 Cover glass 22a Light shielding layer 23 Circuit board 24 Case 40 Indicator 50 Visor 80 Control unit 81 Display control unit 82 Driver monitoring control unit

Claims (5)

  1. 　車両情報を表示し、ドライバーにより直視される表示面を有する表示器と、
    　赤外線光をドライバーに照射する赤外線光源と、
    　前記表示面の少なくとも一部に重なる位置にて前記表示面に対して傾斜し、赤外線光の少なくとも一部を反射させ、可視光の少なくとも一部を透過させる光学パネルと、
    　前記表示面に重ならない位置であって、前記光学パネルを反射した赤外線光を受光するように前記光学パネルの側方に設けられる赤外線カメラと、を備える、
    　車両用表示装置。     A display device for displaying vehicle information and having a display surface directly viewed by a driver;
    An infrared light source that irradiates the driver with infrared light;
    An optical panel that is inclined with respect to the display surface at a position overlapping at least a portion of the display surface, reflects at least a portion of infrared light, and transmits at least a portion of visible light;
    An infrared camera provided at a side of the optical panel so as to receive infrared light reflected from the optical panel at a position not overlapping the display surface;
    Vehicle display device.
  2. 　前記光学パネルは、ホットミラーであり、前記表示面における高さ方向の端部に位置し、前記表示面の中心に近づくにつれて前記表示面から離れるように傾斜する、
    　請求項１に記載の車両用表示装置。     The optical panel is a hot mirror, is located at an end of the display surface in the height direction, and is inclined away from the display surface as it approaches the center of the display surface.
    The vehicle display device according to claim 1.
  3. 　前記表示面に立設し、前記赤外線カメラに向けて開口するように前記光学パネルを周囲から囲む遮光壁を備える、
    　請求項１又は２に記載の車両用表示装置。     A light-shielding wall that stands upright on the display surface and surrounds the optical panel from the periphery so as to open toward the infrared camera;
    The vehicle display device according to claim 1 or 2.
  4. 　前記表示面のうち前記光学パネルと重なる表示エリアに独立した情報を表示する表示制御部を備える、
    　請求項１から３の何れか一項に記載の車両用表示装置。     A display control unit that displays independent information in a display area that overlaps the optical panel of the display surface;
    The vehicle display device according to any one of claims 1 to 3.
  5. 　前記赤外線カメラはステアリングコラム内に設けられる、
    　請求項１から４の何れか一項に記載の車両用表示装置。     The infrared camera is provided in a steering column;
    The vehicular display device according to any one of claims 1 to 4.
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