WO2020158602A1 - Vehicle display device - Google Patents

Vehicle display device Download PDF

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Publication number
WO2020158602A1
WO2020158602A1 PCT/JP2020/002505 JP2020002505W WO2020158602A1 WO 2020158602 A1 WO2020158602 A1 WO 2020158602A1 JP 2020002505 W JP2020002505 W JP 2020002505W WO 2020158602 A1 WO2020158602 A1 WO 2020158602A1
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Prior art keywords
viewer
light
display panel
vehicle
display
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PCT/JP2020/002505
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French (fr)
Japanese (ja)
Inventor
彰大 後藤
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日本精機株式会社
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Priority to JP2020569581A priority Critical patent/JPWO2020158602A1/en
Publication of WO2020158602A1 publication Critical patent/WO2020158602A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/04—Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle

Definitions

  • the present invention relates to a vehicle display device mounted on a vehicle such as an automobile or a motorcycle.
  • Patent Document 1 Conventionally, as a vehicle display device of this type, one described in Patent Document 1 below is known.
  • the vehicle display device described in Patent Document 1 is a vehicle instrument mounted in front of a driver's seat of a vehicle, and is a liquid crystal display panel (display means) for displaying various vehicle information such as the traveling speed of the vehicle. And a resin housing that constitutes an exterior case of the display device.
  • an object of the present invention is to provide a vehicular display device capable of detecting the state of a viewer in order to address the above-mentioned problems.
  • the present invention is capable of capturing an image of a display unit that displays vehicle information and a state of a viewer who visually recognizes the display unit, and is arranged on the side opposite to the viewer side of the display unit that is opposite to the viewer side.
  • Image pickup means an infrared irradiating section for irradiating infrared light toward the viewer, an optical member arranged on the side opposite to the viewer of the display means, and a light source for supplying illumination light to the optical member.
  • the optical member is provided with a missing portion or a through hole portion at a position corresponding to the image pickup means.
  • the present invention is also characterized in that the infrared irradiating section is arranged on the side opposite to the viewer of the display means.
  • the present invention is also characterized in that a plurality of the optical members are provided.
  • the present invention is characterized in that the infrared light emitted from the infrared irradiation unit is emitted toward the viewer side through the display means, and the infrared light after irradiating the viewer is the display. It is characterized in that it is possible to enter the imaging means through the means.
  • a vehicle display device that can achieve a desired purpose and can detect a state of a viewer.
  • FIG. 1 is a front view of a vehicle display device according to an embodiment of the present invention.
  • FIG. 2 is a sectional view taken along line AA of FIG.
  • FIG. 2 is a sectional view taken along line BB in FIG. 1.
  • CC sectional drawing of FIG. The top view which shows typically the positional relationship of the camera module and optical member by the same embodiment.
  • the block diagram which shows the electric constitution of the display device for vehicles by the same embodiment.
  • the top view which shows typically the positional relationship of the camera module and optical member by 2nd Embodiment of this invention.
  • a vehicle instrument D as a vehicle display device includes a display panel (display means) 10 for displaying various vehicle information (predetermined information) such as vehicle speed information, and this display panel.
  • a circuit board 20 located on the back side of the circuit board 10, a plurality of light sources 30 mounted on the front side of the circuit board 20, a protective member 40 covering the front side of the display panel 10, and a driver's seat of the vehicle.
  • the housing 70 is mainly composed of a housing 70 and an instrument panel (instrument panel) 80 that covers the outer edge of the protection member 40.
  • a well-known liquid crystal display panel in which a front polarizing plate and a rear polarizing plate are attached to the front and back surfaces of a liquid crystal cell in which liquid crystal is sealed between a pair of insulating substrates (glass substrates) may be applied. it can.
  • the display panel 10 has a flat display surface 11 on which the viewer E can directly look, and the vehicle information is displayed on the display surface 11.
  • FIG. 1 shows an example in which a vehicle speed display unit 12 indicating the traveling speed of the vehicle is displayed as visual information on the display surface 11 as an example of the vehicle information.
  • the circuit board 20 is, for example, a hard wiring board in which a wiring pattern is formed on a glass epoxy base material, and performs display control of the display panel 10 and lighting control of the light source 30, as well as the camera module 50 (imaging means and infrared rays described later).
  • a control unit 21 as a microcomputer for controlling the operation of the irradiation unit), a light source 30, and various circuit components such as resistors and capacitors are electrically connected to the wiring pattern.
  • the circuit board 20 is electrically connected to the display panel 10 using a flexible wiring board (not shown). Further, the circuit board 20 is provided with a notch 22 having substantially the same shape as a later-described notch at the center of the lower side of the display panel 10.
  • the light source 30 is a light emitting body to which a plurality of chip type light emitting diodes which emit light of an appropriate color can be applied and which emits (provides) light (visible light) toward the optical member 60.
  • the protective member 40 is a substantially flat protective panel member formed of a translucent synthetic resin material and provided so as to cover the front side of the display panel 10.
  • a light shielding portion 41 is formed on the rear surface side peripheral edge of the protection member 40.
  • the light shielding part 41 is formed of, for example, a black print layer.
  • the protective member 40 may be joined to the display panel 10 with a translucent adhesive, and the outermost surface of the protective member 40 on the front side is not a flat flat surface but a convex surface toward the front side. It may be a curved shape (curved shape).
  • the camera module 50 images the face of the viewer E sitting in the driver's seat and detects the state (behavior) of the viewer E from the motion of the face of the viewer E, and the lower center of the display panel 10. Is located behind the display panel 10.
  • the camera module 50 is arranged on the back side of the display panel 10 (the front side polarizing plate and the back side polarizing plate are attached to the front and back sides) and is invisible from the front side. Therefore, the presence of the camera module 50 is less noticeable, and it is possible to enhance the commercial property (design property) of the vehicle instrument D.
  • the camera module 50 includes an image pickup unit 51 capable of picking up an image of the state of the viewer E who visually recognizes the display panel 10, and an infrared irradiation unit 52 which irradiates the viewer E with infrared light (near infrared light). And the image pickup means 51 and the infrared irradiation section 52 are provided so as to be integrated.
  • the image pickup means 51 is a camera having sensitivity in the near infrared region, and is arranged at the position corresponding to the lower center of the display panel 10 and behind the display panel 10.
  • the infrared irradiation unit 52 is arranged behind the display panel 10 so as to irradiate the viewer E with infrared light.
  • a pair of infrared light sources infrared LEDs
  • the optical member 60 is arranged behind the display panel 10 so as to guide the illumination light (visible light) to the display panel 10.
  • a plurality of optical members 60 are provided, and in this example, the optical member 60 is composed of the prism sheet 61 and the light diffusion sheet 62.
  • the prism sheet 61 and the light diffusing sheet 62 are stacked in this order from the rear side to the front side.
  • the prism sheet 61 plays a role of condensing light in one direction to improve brightness, and is an optical sheet in which a plurality of prisms having a condensing function are arranged.
  • the light emitted from the light source 30 is aligned by the prism sheet 61 in a predetermined direction (a direction substantially orthogonal to the sheet surface of the prism sheet 61), efficient light irradiation is performed, and as a result, brightness is improved.
  • the prism sheet 61 which is a component of the optical member 60, is provided with a missing portion 61a at a location corresponding to the image pickup means 51 and the infrared irradiation section 52 (that is, the camera module 50) as shown in FIG. ..
  • the cutout portion 61a is configured as a cutout portion obtained by cutting out a portion corresponding to the lower center of the display panel 10 in a substantially U-shape.
  • the light diffusion sheet 62 plays a role of diffusing and homogenizing the light (visible light) emitted from the prism sheet 61.
  • the light diffusion sheet 62 for example, an optical film in which light diffusion particles are dispersed in a light transmissive resin film can be adopted.
  • the outer shape of the light diffusion sheet 62 is substantially the same as the outer shape of the prism sheet 61. That is, this means that in the light diffusion sheet 62, which is one component of the optical member 60, the light diffusion sheet 62 is communicated with a portion (corresponding to the missing portion 61a) corresponding to the imaging unit 51 and the infrared irradiation unit 52 (that is, the camera module 50). ) It means that the missing portion 62a is provided.
  • the cutout portion 62a is configured as a cutout portion obtained by cutting out a portion corresponding to the lower center of the display panel 10 into a substantially U shape.
  • the housing 70 is a resin instrument housing that constitutes an exterior case of the vehicle instrument D, and has a substantially box shape with an opening on the display panel 10 side. Further, the housing 70 has a bottom wall portion 71 that covers the back side of the circuit board 20 and a peripheral wall portion 72 that surrounds the side of the display panel 10, and the bottom wall portion 71 surrounds the camera module 50. A substantially U-shaped partition wall 73 is provided.
  • the instrument panel 80 is formed of, for example, a black (light-shielding) synthetic resin material, and mainly covers the outer edge portion of the protection member 40.
  • the instrument panel 80 has an opening wall 81 for making the vehicle information visible from the viewer E side.
  • the vehicle instrument D is composed of the above components.
  • the infrared light emitted from the infrared irradiation unit 52 is emitted toward the front side through the display panel 10 (that is, through the display panel 10 and the protection member 40), and the viewer E To reach the face.
  • the infrared light after irradiating the viewer E (face of the viewer E) is reflected in the opposite direction (back side) and passes through the display panel 10 (that is, passes through the protection member 40 and the display panel 10) to be imaged. It is configured such that it can enter the means 51.
  • the imaging unit 51 can image the face of the viewer E illuminated by infrared light, and acquires the reflected light reflected in the opposite direction as an image.
  • the vehicle instrument D includes a control unit 21, a display panel 10, a light source 30, an image pickup unit 51, and an infrared irradiation unit 52.
  • the control unit 21 includes a ROM (Read Only Memory) in which an operation program of the control unit 21 is stored, a CPU (Central Processing Unit) that executes the operation processing of the control unit 21 by executing the operation program, a work such as a CPU. It has a RAM (Random Access Memory) used as an area.
  • ROM Read Only Memory
  • CPU Central Processing Unit
  • RAM Random Access Memory
  • the control unit 21 executes processing for displaying the vehicle speed display unit 12 and the like on the display surface 11 based on information from an in-vehicle ECU (Electronic Control Unit) not shown.
  • the control unit 21 executes a process of turning on the light source 30 based on, for example, an ON operation of a headlight switch (not shown), whereby the vehicle speed display unit 12 is backlit.
  • the control unit 21 also determines the state of the viewer E based on the image captured by the image capturing unit 51. Specifically, the control unit 21 determines whether or not the viewer E is in a drowsiness state based on the image captured by the image capturing unit 51, in a state in which the viewer E is performing a side-looking drive. A process of determining the state of the viewer E, such as whether or not, is executed.
  • control unit 21 determines that the viewer E is in a drowsiness state
  • the control unit 21 causes a speaker (not shown) mounted on the vehicle instrument D to warn the viewer E of a warning sound ( A process for operating the speaker is performed so that a “sound effect” is emitted.
  • a warning message may be displayed on the display surface 11 of the display panel 10 to call attention under the control of the control unit 21.
  • the state of the viewer E who visually recognizes the display panel 10 can be imaged, and the imaging unit 51 arranged on the rear side of the display panel 10 and the infrared light are transmitted to the viewer E.
  • the optical member 60 (prism sheet 61 and light diffusing sheet 62), and the optical member 60 (prism sheet 61 and light diffusing sheet 62) is provided with missing portions 61a and 62a at locations corresponding to the imaging means 51 and the infrared irradiation section 52. It is provided. Further, the infrared light emitted from the infrared irradiation unit 52 is emitted toward the front side through the display panel 10, and the infrared light after being emitted to the viewer E can enter the image pickup means 51 through the display panel 10. Has become.
  • the camera module 50 including the image pickup means 51 and the infrared irradiation section 52 is arranged behind the display panel 10 so as to avoid the optical member 60, so that the optical member 60 is provided behind the display panel 10. Even in the case where is provided, there is an advantage that the state of the viewer E can be detected based on the image captured by the image capturing unit 51.
  • the prism sheet 61 and the light diffusing sheet 62 are provided with the cutout portions 61a and 62a formed of cutout portions in the lower center, but instead of this, the second embodiment of the present invention is used.
  • the prism sheet 61 is provided with through holes 61b at locations corresponding to the image pickup means 51 and the infrared irradiation section 52
  • the light diffusion sheet 62 is provided with the image pickup means 51 and the infrared irradiation section 52.
  • a through-hole portion 62b (which communicates with the through-hole portion 61b) may be provided at the location where the through-hole portion 62b is formed.
  • the through-hole portions 61b and 62b are provided as substantially rectangular through-holes that penetrate the front and back sides at the lower center of the prism sheet 61 and the light diffusion sheet 62.
  • the camera module 50 in which the image pickup unit 51 and the infrared irradiation unit 52 are integrated is adopted, but the image pickup unit 51 and the infrared irradiation unit 52 are integrated.
  • the infrared irradiation unit 52 may be provided at any position as long as the infrared light can be emitted toward the viewer E.
  • (one or more) translucent portions 82 are provided at appropriate portions (for example, the opening wall 81) of the instrument panel 80, and the translucent portions are provided.
  • the infrared irradiation unit 52 may be arranged in the internal space S of the instrument panel 80 so as to correspond to the light transmitting unit 82 so that the infrared light is emitted toward the viewer E through 82.
  • the optical member 60 (the prism sheet 61 and the light diffusing member) is used.
  • the sheet 62 is provided with missing portions 61a and 62a (or through hole portions 61b and 62b) at locations corresponding to the image pickup means 51.
  • the optical member 60 is configured by the two optical sheets (the prism sheet 61 and the light diffusion sheet 62), but the number of the optical sheets may be one or three or more. But it's okay.
  • the optical member 60 may be configured only by the light diffusion sheet 62 which is a single optical sheet, or by the prism sheet 61, the light diffusion sheet 62, and the reflective polarization sheet (not shown) as the double brightness enhancement film.
  • the optical member 60 may be configured.
  • This reflective polarizing sheet is an optical sheet that transmits only light that vibrates in a specific polarization direction out of incident light (visible light) that vibrates in all directions and reflects light that vibrates in other polarization directions.
  • a not-shown missing portion which is disposed so as to be interposed between the light diffusion sheet 62 and the light source 30 and corresponds to the above-mentioned missing portions 61a and 62a (or above-mentioned through hole portions 61b and 62b). Section).
  • the configuration of the third embodiment described above can be applied when the number of the optical members 60 is appropriately changed.
  • the light source 30 is located directly below the light diffusion sheet 62, but instead of this, the light diffusion is performed as shown in FIG. 9 as the fourth embodiment of the present invention.
  • a substantially flat plate-shaped light guide member 90 (an example of an optical member described in the claims below) formed of a translucent synthetic resin material is arranged directly below the sheet 62, and the upper side in FIG.
  • the plurality of light sources 30 may be arranged so as to face the one side surface portion 91 of the light guide member 90 located at.
  • FIG. 9 is a longitudinal sectional view corresponding to FIG. 4 disclosed in the first embodiment.
  • the printed board 92 electrically connected to the circuit board 20 is arranged on the inner wall surface of the peripheral wall portion 72 located on the upper side, and the light source 30 is mounted on the printed board 92 so as to face the one side surface portion 91.
  • the light guide member 90 is arranged in the illumination path of light (visible light) from the light source 30 to the optical member 60, and the outer shape thereof is substantially the same as the outer shape of the prism sheet 61 or the light diffusion sheet 62. Has become. That is, this means that the light guide member 90 is provided with the missing portion 90a having the same shape and the same function as the missing portions 61a and 62a at positions corresponding to the missing portions 61a and 62a.
  • a reflective layer (not shown) having high light reflectivity may be formed on the surface facing the rear side of the light guide member 90.
  • the number of optical members 60 may be changed as appropriate, the optical members 60 may be omitted, or the configuration of the second embodiment or the configuration of the third embodiment described above. It goes without saying that may be combined as appropriate.
  • Display panel 11 Display surface 12
  • Vehicle speed display 20 circuit board 21
  • Control unit 22 Notch 30 light sources 40
  • Protective material 50 camera module 51
  • Imaging means 52 Infrared irradiation unit 60
  • Light diffusion sheet 70 housing 80 instrument panel 81 Opening wall 82 Translucent part 90
  • Light guide member 91 One side part E Viewer (driver)

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

Abstract

Provided is a vehicle display device capable of detecting the state of a viewer. The vehicle display device is provided with: an imaging means 51 capable of imaging the state of a viewer viewing a display panel 10, and disposed on the back side of the display panel 10; an infrared illuminator unit 52 disposed on the back side of the display panel 10 to emit infrared light toward the viewer; and an optical member 60 (a prism sheet 61 and a light diffusion sheet 62) disposed on the back side of the display panel 10 to guide visible light to the display panel 10. The optical member 60 (the prism sheet 61 and the light diffusion sheet 62) has missing portions 61a, 62a at locations corresponding to the imaging means 51 and the infrared illuminator unit 52.

Description

車両用表示装置Vehicle display device
　本発明は、例えば自動車や自動２輪車等の車両に搭載される車両用表示装置に関するものである。  The present invention relates to a vehicle display device mounted on a vehicle such as an automobile or a motorcycle. 
　従来より、この種の車両用表示装置にあっては、例えば下記特許文献１に記載されているものが知られている。この特許文献１に記載の車両用表示装置は、車両の運転席前方に搭載された車両用計器であり、車両の走行速度等をはじめとする各種車両情報を表示する液晶表示パネル（表示手段）と、表示装置の外装ケースを構成する樹脂製の筐体とから主に構成される。 Conventionally, as a vehicle display device of this type, one described in Patent Document 1 below is known. The vehicle display device described in Patent Document 1 is a vehicle instrument mounted in front of a driver's seat of a vehicle, and is a liquid crystal display panel (display means) for displaying various vehicle information such as the traveling speed of the vehicle. And a resin housing that constitutes an exterior case of the display device.
特開２０１８－５４２９１号公報Japanese Patent Laid-Open No. 2018-54291
　近年、車両の運転席に着座するとともに前記液晶表示パネルを視認する運転者（視認者）の顔を撮像するとともに、運転者の顔の動作等から運転者の状態（挙動）を検知するカメラモジュールを前記車両用計器に搭載するという技術の実用化が注目されつつある。ところで、特許文献１に記載の車両用表示装置にあっては、運転者の状態を検出すべく、カメラモジュールを車両用表示装置に搭載するような構成は想定されていないため、この点で更なる改良の余地があった。
　そこで本発明は、前述の課題に対して対処するため、視認者の状態を検出することが可能な車両用表示装置の提供を目的とするものである。 In recent years, a camera module that images the face of a driver (viewer) who is seated in the driver's seat of a vehicle and visually recognizes the liquid crystal display panel, and detects the state (behavior) of the driver from the movement of the driver's face and the like. Practical application of the technology of installing the above-mentioned in the vehicle instrument is attracting attention. By the way, in the vehicle display device described in Patent Document 1, a configuration in which the camera module is mounted on the vehicle display device in order to detect the state of the driver is not assumed. There was room for improvement.
Therefore, an object of the present invention is to provide a vehicular display device capable of detecting the state of a viewer in order to address the above-mentioned problems.
　本発明は、車両情報を表示する表示手段と、前記表示手段を視認する視認者の状態を撮像可能であって、前記視認者側とは反対側となる前記表示手段の反視認者側に配置される撮像手段と、赤外光を前記視認者に向けて照射する赤外線照射部と、前記表示手段の前記反視認者側に配置される光学部材と、前記光学部材に照明光を供給する光源とを備え、前記光学部材には、前記撮像手段に対応する箇所に欠落部もしくは貫通孔部が設けられていることを特徴とする。 The present invention is capable of capturing an image of a display unit that displays vehicle information and a state of a viewer who visually recognizes the display unit, and is arranged on the side opposite to the viewer side of the display unit that is opposite to the viewer side. Image pickup means, an infrared irradiating section for irradiating infrared light toward the viewer, an optical member arranged on the side opposite to the viewer of the display means, and a light source for supplying illumination light to the optical member. And the optical member is provided with a missing portion or a through hole portion at a position corresponding to the image pickup means.
　また本発明は、前記赤外線照射部は、前記表示手段の前記反視認者側に配置されることを特徴とする。  The present invention is also characterized in that the infrared irradiating section is arranged on the side opposite to the viewer of the display means. 
　また本発明は、前記光学部材は、複数個設けられていることを特徴とする。  The present invention is also characterized in that a plurality of the optical members are provided. 
　また本発明は、前記赤外線照射部から照射される前記赤外光は、前記表示手段を介して前記視認者側に向けて照射され、前記視認者を照射後の前記赤外光は、前記表示手段を経て前記撮像手段に入射可能となっていることを特徴とする。 Further, the present invention is characterized in that the infrared light emitted from the infrared irradiation unit is emitted toward the viewer side through the display means, and the infrared light after irradiating the viewer is the display. It is characterized in that it is possible to enter the imaging means through the means.
　本発明によれば、所期の目的を達成でき、視認者の状態を検出することが可能な車両用表示装置を提供できる。  According to the present invention, it is possible to provide a vehicle display device that can achieve a desired purpose and can detect a state of a viewer. 
本発明の実施形態による車両用表示装置の正面図。1 is a front view of a vehicle display device according to an embodiment of the present invention. 図１のＡ－Ａ断面図。FIG. 2 is a sectional view taken along line AA of FIG. 図１のＢ－Ｂ断面図。FIG. 2 is a sectional view taken along line BB in FIG. 1. 図１のＣ－Ｃ断面図。CC sectional drawing of FIG. 同実施形態によるカメラモジュールと光学部材との位置関係を模式的に示す平面図。The top view which shows typically the positional relationship of the camera module and optical member by the same embodiment. 同実施形態による車両用表示装置の電気的構成を示すブロック図。The block diagram which shows the electric constitution of the display device for vehicles by the same embodiment. 本発明の第２実施形態によるカメラモジュールと光学部材との位置関係を模式的に示す平面図。The top view which shows typically the positional relationship of the camera module and optical member by 2nd Embodiment of this invention. 本発明の第３実施形態による車両用表示装置の断面図。Sectional drawing of the vehicle display apparatus by 3rd Embodiment of this invention. 本発明の第４実施形態による車両用表示装置の断面図。Sectional drawing of the vehicle display apparatus by 4th Embodiment of this invention.
（第１実施形態）以下、図１～図６に基づいて、本発明の車両用表示装置を自動車の運転席前方に搭載される車両用計器に適用した場合を例に挙げて説明する。なお、以下の説明では、車両用計器を正視（視認）する視認者側を前方側（前側）とし、当該視認者側とは反対側である反視認者側を背後側（後側）とする。 (First Embodiment) A case in which the vehicle display device of the present invention is applied to a vehicle instrument mounted in front of a driver's seat of an automobile will be described below with reference to FIGS. 1 to 6. In addition, in the following description, the viewer side who directly looks (visually recognizes) the vehicle instrument is the front side (front side), and the anti-viewer side opposite to the viewer side is the rear side (rear side). ..
　図１～図４において、本実施形態による車両用表示装置としての車両用計器Ｄは、車速情報等の各種の車両情報（所定情報）を表示する表示パネル（表示手段）１０と、この表示パネル１０の背後側に位置する回路基板２０と、この回路基板２０の前方側に実装された複数個の光源３０と、表示パネル１０の前方側を覆う保護部材４０と、車両の運転席に着座する運転者Ｅ（以下、視認者Ｅとも言う）を監視するカメラモジュール５０と、表示パネル１０と光源３０との間に配置される光学部材６０と、回路基板２０とカメラモジュール５０と光学部材６０とを収容する筐体７０と、保護部材４０の外縁部を隠蔽するインストルメントパネル（インパネ）８０とから主に構成されている。 1 to 4, a vehicle instrument D as a vehicle display device according to the present embodiment includes a display panel (display means) 10 for displaying various vehicle information (predetermined information) such as vehicle speed information, and this display panel. A circuit board 20 located on the back side of the circuit board 10, a plurality of light sources 30 mounted on the front side of the circuit board 20, a protective member 40 covering the front side of the display panel 10, and a driver's seat of the vehicle. A camera module 50 for monitoring a driver E (hereinafter, also referred to as a viewer E), an optical member 60 arranged between the display panel 10 and the light source 30, a circuit board 20, a camera module 50, and an optical member 60. The housing 70 is mainly composed of a housing 70 and an instrument panel (instrument panel) 80 that covers the outer edge of the protection member 40.
　表示パネル１０は、例えば一対の絶縁基板（ガラス基板）間に液晶を封入した液晶セルの表裏面に表側偏光板、後側偏光板が各々貼り付けられた周知の液晶表示パネルを適用することができる。 As the display panel 10, for example, a well-known liquid crystal display panel in which a front polarizing plate and a rear polarizing plate are attached to the front and back surfaces of a liquid crystal cell in which liquid crystal is sealed between a pair of insulating substrates (glass substrates) may be applied. it can.
　また、表示パネル１０は、視認者Ｅが直視可能な平坦な表示面１１を有し、この表示面１１に前記車両情報が表示される。例えば図１では、前記車両情報の一例として車両の走行速度を示す車速表示部１２が表示面１１に視覚情報として表示された例を示している。 Further, the display panel 10 has a flat display surface 11 on which the viewer E can directly look, and the vehicle information is displayed on the display surface 11. For example, FIG. 1 shows an example in which a vehicle speed display unit 12 indicating the traveling speed of the vehicle is displayed as visual information on the display surface 11 as an example of the vehicle information.
　回路基板２０は、例えばガラスエポキシ系基材に配線パターンが施された硬質配線基板であり、表示パネル１０の表示制御や光源３０の点灯制御を行うとともに、カメラモジュール５０（後述する撮像手段や赤外線照射部）の動作を制御するマイクロコンピュータとしての制御部２１と、光源３０と、抵抗、コンデンサ等の各種回路部品とが前記配線パターンに導通接続されている。 The circuit board 20 is, for example, a hard wiring board in which a wiring pattern is formed on a glass epoxy base material, and performs display control of the display panel 10 and lighting control of the light source 30, as well as the camera module 50 (imaging means and infrared rays described later). A control unit 21 as a microcomputer for controlling the operation of the irradiation unit), a light source 30, and various circuit components such as resistors and capacitors are electrically connected to the wiring pattern.
　なお、回路基板２０は、フレキシブル配線板（図示省略）を用いて表示パネル１０と電気的に接続される。また、回路基板２０には、表示パネル１０の下側中央において、後述する欠落部と略同一形状の切欠部２２が設けられている。 The circuit board 20 is electrically connected to the display panel 10 using a flexible wiring board (not shown). Further, the circuit board 20 is provided with a notch 22 having substantially the same shape as a later-described notch at the center of the lower side of the display panel 10.
　光源３０は、適宜色の光を発する複数個のチップ型発光ダイオードを適用することができ、光学部材６０に向けて光（可視光）を発する（供給する）発光体である。 The light source 30 is a light emitting body to which a plurality of chip type light emitting diodes which emit light of an appropriate color can be applied and which emits (provides) light (visible light) toward the optical member 60.
　保護部材４０は、透光性合成樹脂材料によって形成され、表示パネル１０の前方側を覆うように設けられた略平板状の保護パネル部材である。この保護部材４０の後面側周縁には遮光部４１が形成されている。遮光部４１は、例えば黒色の印刷層によって形成されている。なお、保護部材４０は透光性の接着剤によって表示パネル１０と接合してもよく、さらには前方側となる保護部材４０の最表面はフラットな平坦面ではなく前方側に向けて凸となる曲面形状（湾曲形状）でもよい。 The protective member 40 is a substantially flat protective panel member formed of a translucent synthetic resin material and provided so as to cover the front side of the display panel 10. A light shielding portion 41 is formed on the rear surface side peripheral edge of the protection member 40. The light shielding part 41 is formed of, for example, a black print layer. The protective member 40 may be joined to the display panel 10 with a translucent adhesive, and the outermost surface of the protective member 40 on the front side is not a flat flat surface but a convex surface toward the front side. It may be a curved shape (curved shape).
　カメラモジュール５０は、運転席に着座する視認者Ｅの顔を撮像し、視認者Ｅの顔の動作等から視認者Ｅの状態（挙動）を検知するものであり、表示パネル１０の下側中央に対応する位置であって、表示パネル１０の背後側に配置される。 The camera module 50 images the face of the viewer E sitting in the driver's seat and detects the state (behavior) of the viewer E from the motion of the face of the viewer E, and the lower center of the display panel 10. Is located behind the display panel 10.
　このように、本例の場合、カメラモジュール５０は（表裏面に表側偏光板、裏側偏光板が貼られた）表示パネル１０の背後側に配置され、前方側からは視認不可能な状態となるので、カメラモジュール５０の存在が目立ちにくくなり、車両用計器Ｄの商品性（デザイン性）を高めることが可能となる。 As described above, in the case of this example, the camera module 50 is arranged on the back side of the display panel 10 (the front side polarizing plate and the back side polarizing plate are attached to the front and back sides) and is invisible from the front side. Therefore, the presence of the camera module 50 is less noticeable, and it is possible to enhance the commercial property (design property) of the vehicle instrument D.
　また、カメラモジュール５０は、表示パネル１０を視認する視認者Ｅの状態を撮像可能である撮像手段５１と、赤外光（近赤外光）を視認者Ｅに向けて照射する赤外線照射部５２とを有し、撮像手段５１と赤外線照射部５２とが一体となるように設けられる。 Further, the camera module 50 includes an image pickup unit 51 capable of picking up an image of the state of the viewer E who visually recognizes the display panel 10, and an infrared irradiation unit 52 which irradiates the viewer E with infrared light (near infrared light). And the image pickup means 51 and the infrared irradiation section 52 are provided so as to be integrated.
　撮像手段５１は、近赤外領域に感度を持つカメラであり、表示パネル１０の前記下側中央に対応する位置であって、表示パネル１０の背後側に配置される。 The image pickup means 51 is a camera having sensitivity in the near infrared region, and is arranged at the position corresponding to the lower center of the display panel 10 and behind the display panel 10.
　赤外線照射部５２は、赤外光を視認者Ｅに向けて照射するように表示パネル１０の背後側に配置される。赤外線照射部５２は、表示パネル１０の板面方向において、撮像手段５１を挟むように撮像手段５１の両隣に配置された一対の赤外線光源（赤外線ＬＥＤ）を適用することができる。 The infrared irradiation unit 52 is arranged behind the display panel 10 so as to irradiate the viewer E with infrared light. As the infrared irradiation unit 52, a pair of infrared light sources (infrared LEDs) arranged on both sides of the image pickup unit 51 so as to sandwich the image pickup unit 51 in the plate surface direction of the display panel 10 can be applied.
　光学部材６０は、前記照明光（可視光）を表示パネル１０へと導くように表示パネル１０の背後側に配置される。光学部材６０は、複数個設けられ、本例の場合、プリズムシート６１と光拡散シート６２とで光学部材６０が構成されるものとする。 The optical member 60 is arranged behind the display panel 10 so as to guide the illumination light (visible light) to the display panel 10. A plurality of optical members 60 are provided, and in this example, the optical member 60 is composed of the prism sheet 61 and the light diffusion sheet 62.
　ここで、プリズムシート６１と光拡散シート６２との位置関係に着目すると、背後側から前方側に向かうに従って、プリズムシート６１、光拡散シート６２の順に積層配置される。 Here, focusing on the positional relationship between the prism sheet 61 and the light diffusing sheet 62, the prism sheet 61 and the light diffusing sheet 62 are stacked in this order from the rear side to the front side.
　プリズムシート６１は、光を一方向に集光して輝度を向上する役割を果たすものであり、集光機能を有する複数個のプリズムが配列された光学シートである。光源３０から発せられる光は、このプリズムシート６１によって所定の方向（プリズムシート６１のシート面に対して略直交する方向）に揃えられ、効率的な光照射が行われ、結果として輝度向上が図られる。 The prism sheet 61 plays a role of condensing light in one direction to improve brightness, and is an optical sheet in which a plurality of prisms having a condensing function are arranged. The light emitted from the light source 30 is aligned by the prism sheet 61 in a predetermined direction (a direction substantially orthogonal to the sheet surface of the prism sheet 61), efficient light irradiation is performed, and as a result, brightness is improved. To be
　そして、光学部材６０の一構成部品であるプリズムシート６１には、図５に示すように撮像手段５１及び赤外線照射部５２（つまりカメラモジュール５０）に対応する箇所に欠落部６１ａが設けられている。欠落部６１ａは、表示パネル１０の前記下側中央に対応する部分を、略コの字形に切り欠くことで得られる切り欠き部として構成される。 The prism sheet 61, which is a component of the optical member 60, is provided with a missing portion 61a at a location corresponding to the image pickup means 51 and the infrared irradiation section 52 (that is, the camera module 50) as shown in FIG. .. The cutout portion 61a is configured as a cutout portion obtained by cutting out a portion corresponding to the lower center of the display panel 10 in a substantially U-shape.
　また、光拡散シート６２は、プリズムシート６１から照射される光（可視光）光を拡散して均一化する役割を果たすものである。光拡散シート６２としては、例えば光透過性の樹脂フィルム中に光拡散粒子を分散した光学フィルム等を採用することができる。 Further, the light diffusion sheet 62 plays a role of diffusing and homogenizing the light (visible light) emitted from the prism sheet 61. As the light diffusion sheet 62, for example, an optical film in which light diffusion particles are dispersed in a light transmissive resin film can be adopted.
　また、本例の場合、光拡散シート６２は、その外形形状がプリズムシート６１の外形形状と略一致している。つまり、このことは、光学部材６０の一構成部品である光拡散シート６２には、撮像手段５１及び赤外線照射部５２（つまりカメラモジュール５０）に対応する箇所に（欠落部６１ａに連通するような）欠落部６２ａが設けられていることを意味する。欠落部６２ａは、表示パネル１０の前記下側中央に対応する部分を略コの字形に切り欠くことで得られる切り欠き部として構成される。 Further, in the case of this example, the outer shape of the light diffusion sheet 62 is substantially the same as the outer shape of the prism sheet 61. That is, this means that in the light diffusion sheet 62, which is one component of the optical member 60, the light diffusion sheet 62 is communicated with a portion (corresponding to the missing portion 61a) corresponding to the imaging unit 51 and the infrared irradiation unit 52 (that is, the camera module 50). ) It means that the missing portion 62a is provided. The cutout portion 62a is configured as a cutout portion obtained by cutting out a portion corresponding to the lower center of the display panel 10 into a substantially U shape.
　筐体７０は、車両用計器Ｄの外装ケースを構成する樹脂製の計器ハウジングであり、表示パネル１０側が開口した略箱型形状となっている。また、筐体７０は、回路基板２０の背後側を覆う底壁部７１と、表示パネル１０の側方を囲む周壁部７２とを有し、底壁部７１にはカメラモジュール５０を包囲するような略コの字状の仕切壁７３が設けられている。 The housing 70 is a resin instrument housing that constitutes an exterior case of the vehicle instrument D, and has a substantially box shape with an opening on the display panel 10 side. Further, the housing 70 has a bottom wall portion 71 that covers the back side of the circuit board 20 and a peripheral wall portion 72 that surrounds the side of the display panel 10, and the bottom wall portion 71 surrounds the camera module 50. A substantially U-shaped partition wall 73 is provided.
　インストルメントパネル８０は、例えば黒色（遮光性）の合成樹脂材料によって形成され、主に保護部材４０の外縁部を覆うものである。インストルメントパネル８０は、前記車両情報を視認者Ｅ側から視認可能とするための開口壁８１を有する。 The instrument panel 80 is formed of, for example, a black (light-shielding) synthetic resin material, and mainly covers the outer edge portion of the protection member 40. The instrument panel 80 has an opening wall 81 for making the vehicle information visible from the viewer E side.
　以上の各部により、車両用計器Ｄが構成される。このような構成において、赤外線照射部５２から照射される赤外光は、表示パネル１０を介して（つまり表示パネル１０及び保護部材４０を通過して）前方側に向けて照射され、視認者Ｅの顔に到達する。 The vehicle instrument D is composed of the above components. In such a configuration, the infrared light emitted from the infrared irradiation unit 52 is emitted toward the front side through the display panel 10 (that is, through the display panel 10 and the protection member 40), and the viewer E To reach the face.
　さらに、視認者Ｅ（視認者Ｅの顔）を照射後の赤外光は逆方向（背後側）に反射して表示パネル１０を経て（つまり保護部材４０及び表示パネル１０を通過して）撮像手段５１に入射可能な構成となっている。この結果、撮像手段５１は、赤外光に照らされた視認者Ｅの顔を撮像することができ、当該逆方向に反射した反射光を画像として取得する。 Further, the infrared light after irradiating the viewer E (face of the viewer E) is reflected in the opposite direction (back side) and passes through the display panel 10 (that is, passes through the protection member 40 and the display panel 10) to be imaged. It is configured such that it can enter the means 51. As a result, the imaging unit 51 can image the face of the viewer E illuminated by infrared light, and acquires the reflected light reflected in the opposite direction as an image.
　次に、図６に基づいて、車両用計器Ｄの電気的な構成について説明する。車両用計器Ｄは、制御部２１と、表示パネル１０と、光源３０と、撮像手段５１と、赤外線照射部５２とを備える。 Next, the electrical configuration of the vehicle instrument D will be described with reference to FIG. The vehicle instrument D includes a control unit 21, a display panel 10, a light source 30, an image pickup unit 51, and an infrared irradiation unit 52.
　制御部２１は、制御部２１の動作プログラムが記憶されたＲＯＭ(Read Only Memory)、前記動作プログラムを実行することで制御部２１の動作処理を実行するＣＰＵ(Central Processing Unit)、ＣＰＵ等のワークエリアとして利用されるＲＡＭ(Random Access Memory)等を有する。  The control unit 21 includes a ROM (Read Only Memory) in which an operation program of the control unit 21 is stored, a CPU (Central Processing Unit) that executes the operation processing of the control unit 21 by executing the operation program, a work such as a CPU. It has a RAM (Random Access Memory) used as an area. 
　制御部２１は、図示省略した車載ＥＣＵ（Electronic Control Unit）からの情報に基づいて、表示面１１に車速表示部１２等を表示させる処理を実行する。制御部２１は、例えば図示省略した前照灯スイッチのオン操作に基づいて、光源３０を点灯させる処理を実行し、これにより車速表示部１２がバックライト照明される。 The control unit 21 executes processing for displaying the vehicle speed display unit 12 and the like on the display surface 11 based on information from an in-vehicle ECU (Electronic Control Unit) not shown. The control unit 21 executes a process of turning on the light source 30 based on, for example, an ON operation of a headlight switch (not shown), whereby the vehicle speed display unit 12 is backlit.
　また、制御部２１は、撮像手段５１が撮像した画像に基づいて、視認者Ｅの状態を判断する。具体的には、制御部２１は、撮像手段５１が撮像した画像に基づいて、視認者Ｅが眠気を催している状態であるか否か、視認者Ｅが脇見運転をしている状態であるか否か等の視認者Ｅの状態を判断する処理を実行する。 The control unit 21 also determines the state of the viewer E based on the image captured by the image capturing unit 51. Specifically, the control unit 21 determines whether or not the viewer E is in a drowsiness state based on the image captured by the image capturing unit 51, in a state in which the viewer E is performing a side-looking drive. A process of determining the state of the viewer E, such as whether or not, is executed.
　制御部２１は、例えば視認者Ｅが眠気を催している状態であると判断した場合、車両用計器Ｄに搭載されたスピーカ（図示省略）から視認者Ｅに対する注意喚起を促すための警告音（「ピー」という効果音）が吹鳴されるように、当該スピーカを動作させる処理を実行する。なお、警告音の吹鳴に代えて、制御部２１による制御のもと、表示パネル１０の表示面１１に注意喚起を促すための警告メッセージを表示してもよい。 For example, when the control unit 21 determines that the viewer E is in a drowsiness state, the control unit 21 causes a speaker (not shown) mounted on the vehicle instrument D to warn the viewer E of a warning sound ( A process for operating the speaker is performed so that a “sound effect” is emitted. Note that instead of the warning sound being emitted, a warning message may be displayed on the display surface 11 of the display panel 10 to call attention under the control of the control unit 21.
　以上のように本実施形態では、表示パネル１０を視認する視認者Ｅの状態を撮像可能であって、表示パネル１０の背後側に配置される撮像手段５１と、赤外光を視認者Ｅに向けて照射するように表示パネル１０の背後側に配置される赤外線照射部５２と、前記照明光（可視光）を表示パネル１０へと導くように表示パネル１０の背後側に配置される光学部材６０（プリズムシート６１及び光拡散シート６２）とを備え、光学部材６０（プリズムシート６１及び光拡散シート６２）には、撮像手段５１及び赤外線照射部５２に対応する箇所に欠落部６１ａ、６２ａが設けられているものである。また、赤外線照射部５２から照射される赤外光は表示パネル１０を介して前方側に向けて照射され、視認者Ｅを照射後の赤外光は表示パネル１０を経て撮像手段５１に入射可能となっているものである。 As described above, in the present embodiment, the state of the viewer E who visually recognizes the display panel 10 can be imaged, and the imaging unit 51 arranged on the rear side of the display panel 10 and the infrared light are transmitted to the viewer E. An infrared irradiating section 52 arranged on the rear side of the display panel 10 so as to irradiate toward the display panel, and an optical member arranged on the rear side of the display panel 10 so as to guide the illumination light (visible light) to the display panel 10. 60 (prism sheet 61 and light diffusing sheet 62), and the optical member 60 (prism sheet 61 and light diffusing sheet 62) is provided with missing portions 61a and 62a at locations corresponding to the imaging means 51 and the infrared irradiation section 52. It is provided. Further, the infrared light emitted from the infrared irradiation unit 52 is emitted toward the front side through the display panel 10, and the infrared light after being emitted to the viewer E can enter the image pickup means 51 through the display panel 10. Has become.
　従って、撮像手段５１と赤外線照射部５２とからなるカメラモジュール５０が、光学部材６０を避けるように表示パネル１０の背後側に配置される構成となるため、表示パネル１０の背後側に光学部材６０が設けられた場合であっても、撮像手段５１が撮像した画像に基づき視認者Ｅの状態を検出することができるという利点がある。 Therefore, the camera module 50 including the image pickup means 51 and the infrared irradiation section 52 is arranged behind the display panel 10 so as to avoid the optical member 60, so that the optical member 60 is provided behind the display panel 10. Even in the case where is provided, there is an advantage that the state of the viewer E can be detected based on the image captured by the image capturing unit 51.
　なお、本発明は、上述の実施形態及び図面によって限定されるものではない。本発明の要旨を変更しない範囲で、適宜、実施形態及び図面に変更（構成要素の削除も含む）を加えることが可能である。 Note that the present invention is not limited to the above embodiment and drawings. Modifications (including deletion of components) can be appropriately added to the embodiments and the drawings without changing the gist of the present invention.
　例えば上述した第１実施形態では、プリズムシート６１、光拡散シート６２の前記下側中央に切欠部からなる欠落部６１ａ、６２ａを設けたものであったが、これに代えて本発明の第２実施形態として図７に示すようにプリズムシート６１には撮像手段５１及び赤外線照射部５２に対応する箇所に貫通孔部６１ｂを設け、光拡散シート６２には撮像手段５１及び赤外線照射部５２に対応する箇所に（貫通孔部６１ｂに連通するような）貫通孔部６２ｂを設けてもよい。これら貫通孔部６１ｂ、６２ｂは、プリズムシート６１及び光拡散シート６２の前記下側中央にて、表裏を貫通する略矩形の貫通孔として設けられる。 For example, in the above-described first embodiment, the prism sheet 61 and the light diffusing sheet 62 are provided with the cutout portions 61a and 62a formed of cutout portions in the lower center, but instead of this, the second embodiment of the present invention is used. As an embodiment, as shown in FIG. 7, the prism sheet 61 is provided with through holes 61b at locations corresponding to the image pickup means 51 and the infrared irradiation section 52, and the light diffusion sheet 62 is provided with the image pickup means 51 and the infrared irradiation section 52. A through-hole portion 62b (which communicates with the through-hole portion 61b) may be provided at the location where the through-hole portion 62b is formed. The through- hole portions 61b and 62b are provided as substantially rectangular through-holes that penetrate the front and back sides at the lower center of the prism sheet 61 and the light diffusion sheet 62.
　また、上述した第１実施形態では、撮像手段５１と赤外線照射部５２とが一体となっているカメラモジュール５０を採用したものであったが、撮像手段５１と赤外線照射部５２とは一体となっていなくてもよく、赤外線照射部５２は、赤外光を視認者Ｅに向けて照射可能な位置であれば、あらゆる位置に設けることが可能である。 Further, in the above-described first embodiment, the camera module 50 in which the image pickup unit 51 and the infrared irradiation unit 52 are integrated is adopted, but the image pickup unit 51 and the infrared irradiation unit 52 are integrated. The infrared irradiation unit 52 may be provided at any position as long as the infrared light can be emitted toward the viewer E.
　具体的には、本発明の第３実施形態として図８に示すようにインストルメントパネル８０の適宜箇所（例えば開口壁８１）に（１つ以上の）透光部８２を設け、当該透光部８２を通じて赤外光が視認者Ｅに向けて照射されるようにインストルメントパネル８０の内部空間Ｓにて透光部８２に対応させて赤外線照射部５２を配置してもよい。 Specifically, as shown in FIG. 8 as a third embodiment of the present invention, (one or more) translucent portions 82 are provided at appropriate portions (for example, the opening wall 81) of the instrument panel 80, and the translucent portions are provided. The infrared irradiation unit 52 may be arranged in the internal space S of the instrument panel 80 so as to correspond to the light transmitting unit 82 so that the infrared light is emitted toward the viewer E through 82.
　そして、このようにインストルメントパネル８０の内部空間Ｓに設置される赤外線照射部５２が視認者Ｅに向けて赤外光を照射する構成を採用する場合、光学部材６０（プリズムシート６１及び光拡散シート６２）には、撮像手段５１に対応する箇所に欠落部６１ａ、６２ａ（もしくは貫通孔部６１ｂ、６２ｂ）が設けられることになる。 When the infrared irradiating section 52 installed in the internal space S of the instrument panel 80 irradiates the viewer E with infrared light as described above, the optical member 60 (the prism sheet 61 and the light diffusing member) is used. The sheet 62) is provided with missing portions 61a and 62a (or through hole portions 61b and 62b) at locations corresponding to the image pickup means 51.
　また、上述した第１実施形態では、２つの光学シート（プリズムシート６１、光拡散シート６２）によって光学部材６０が構成されていたが、前記光学シートの個数は、１つでもよいし３つ以上でもよい。例えば単一の光学シートである光拡散シート６２のみによって光学部材６０を構成してもよいし、プリズムシート６１と光拡散シート６２と２重輝度向上フィルムとしての反射偏光シート（図示省略）とによって光学部材６０を構成してもよい。 Further, in the above-described first embodiment, the optical member 60 is configured by the two optical sheets (the prism sheet 61 and the light diffusion sheet 62), but the number of the optical sheets may be one or three or more. But it's okay. For example, the optical member 60 may be configured only by the light diffusion sheet 62 which is a single optical sheet, or by the prism sheet 61, the light diffusion sheet 62, and the reflective polarization sheet (not shown) as the double brightness enhancement film. The optical member 60 may be configured.
　この反射偏光シートは、あらゆる方向に振動しながら入射する光（可視光）のうち、特定の偏光方向に振動する光のみ透過させて、他の偏光方向に振動する光は反射する光学シートであり、例えば光拡散シート６２と光源３０との間に介在するように配置され、上述した欠落部６１ａ、６２ａ（あるいは上述した貫通孔部６１ｂ、６２ｂ）に相当する図示省略した欠落部（あるいは貫通孔部）を備える。なお、このように光学部材６０の個数を適宜、変化させた場合において、上述した第３実施形態の構成を適用できることは言うまでもない。 This reflective polarizing sheet is an optical sheet that transmits only light that vibrates in a specific polarization direction out of incident light (visible light) that vibrates in all directions and reflects light that vibrates in other polarization directions. For example, a not-shown missing portion (or through hole) which is disposed so as to be interposed between the light diffusion sheet 62 and the light source 30 and corresponds to the above-mentioned missing portions 61a and 62a (or above-mentioned through hole portions 61b and 62b). Section). Needless to say, the configuration of the third embodiment described above can be applied when the number of the optical members 60 is appropriately changed.
　さらに、上述した第１実施形態では、光拡散シート６２の真下に光源３０が位置している構成であったが、これに代えて本発明の第４実施形態として図９に示すように光拡散シート６２の真下に透光性の合成樹脂材料によって形成された略平板状の導光部材９０（後述する特許請求の範囲に記載された光学部材の一例）を配置するとともに、図１中、上側に位置する導光部材９０の一側面部９１に対向するように（複数個の）光源３０を配置してもよい。図９は、第１実施形態にて開示した図４に対応する縦断面図面となっている。 Further, in the above-described first embodiment, the light source 30 is located directly below the light diffusion sheet 62, but instead of this, the light diffusion is performed as shown in FIG. 9 as the fourth embodiment of the present invention. A substantially flat plate-shaped light guide member 90 (an example of an optical member described in the claims below) formed of a translucent synthetic resin material is arranged directly below the sheet 62, and the upper side in FIG. The plurality of light sources 30 may be arranged so as to face the one side surface portion 91 of the light guide member 90 located at. FIG. 9 is a longitudinal sectional view corresponding to FIG. 4 disclosed in the first embodiment.
　この場合、図１中、上側に位置する周壁部７２の内壁面に回路基板２０と導通接続されたプリント基板９２を配置し、一側面部９１と向かい合うようにプリント基板９２に光源３０が実装される。一方、導光部材９０は、光源３０から光学部材６０へと至る光（可視光）の照明経路中に配置され、その外形形状は、プリズムシート６１や光拡散シート６２の外形形状と略同一形状となっている。つまり、このことは導光部材９０には、欠落部６１ａ、６２ａに対応する位置に欠落部６１ａ、６２ａと同一形状、同一機能を有する欠落部９０ａが設けられることを意味する。 In this case, in FIG. 1, the printed board 92 electrically connected to the circuit board 20 is arranged on the inner wall surface of the peripheral wall portion 72 located on the upper side, and the light source 30 is mounted on the printed board 92 so as to face the one side surface portion 91. It On the other hand, the light guide member 90 is arranged in the illumination path of light (visible light) from the light source 30 to the optical member 60, and the outer shape thereof is substantially the same as the outer shape of the prism sheet 61 or the light diffusion sheet 62. Has become. That is, this means that the light guide member 90 is provided with the missing portion 90a having the same shape and the same function as the missing portions 61a and 62a at positions corresponding to the missing portions 61a and 62a.
　なお、必要に応じて、導光部材９０の後側を向く面に光反射性の高い反射層（図示省略）を形成してもよい。そして、この第４実施形態において、光学部材６０の個数を適宜、変えてもよいし、光学部材６０を廃止してもよいし、もしくは上述した第２実施形態の構成または第３実施形態の構成を適宜組み合わせてもよいことは言うまでもない。 If necessary, a reflective layer (not shown) having high light reflectivity may be formed on the surface facing the rear side of the light guide member 90. In the fourth embodiment, the number of optical members 60 may be changed as appropriate, the optical members 60 may be omitted, or the configuration of the second embodiment or the configuration of the third embodiment described above. It goes without saying that may be combined as appropriate.
　１０　　表示パネル 
　１１　　表示面 
　１２　　車速表示部 
　２０　　回路基板 
　２１　　制御部 
　２２　　切欠部 
　３０　　光源 
　４０　　保護部材 
　５０　　カメラモジュール 
　５１　　撮像手段 
　５２　　赤外線照射部 
　６０　　光学部材 
　６１　　プリズムシート 
　６１ａ、６２ａ　欠落部 
　６１ｂ、６２ｂ　貫通孔部 
　６２　　光拡散シート 
　７０　　筐体 
　８０　　インストルメントパネル 
　８１　　開口壁 
　８２　　透光部 
　９０　　導光部材 
　９１　　一側面部 
　　Ｅ　　視認者（運転者）  10 Display panel
11 Display surface
12 Vehicle speed display
20 circuit board
21 Control unit
22 Notch
30 light sources
40 Protective material
50 camera module
51 imaging means
52 Infrared irradiation unit
60 Optical member
61 prism sheet
61a, 62a Missing part
61b, 62b Through hole portion
62 Light diffusion sheet
70 housing
80 instrument panel
81 Opening wall
82 Translucent part
90 Light guide member
91 One side part
E Viewer (driver)

Claims (4)

  1. 車両情報を表示する表示手段と、 
    前記表示手段を視認する視認者の状態を撮像可能であって、前記視認者側とは反対側となる前記表示手段の反視認者側に配置される撮像手段と、
    赤外光を前記視認者に向けて照射する赤外線照射部と、 
    可視光を前記表示手段へと導くように前記表示手段の前記反視認者側に配置される光学部材とを備え、 
    前記光学部材には、前記撮像手段に対応する箇所に欠落部もしくは貫通孔部が設けられていることを特徴とする車両用表示装置。      Display means for displaying vehicle information,
    An image pickup means capable of picking up an image of a state of a viewer visually recognizing the display means, the image pickup means being arranged on a side opposite to the viewer side of the display means, which is opposite to the viewer side.
    An infrared irradiation unit that irradiates the viewer with infrared light,
    An optical member arranged on the side opposite to the viewer of the display means so as to guide visible light to the display means,
    A display device for a vehicle, wherein the optical member is provided with a missing portion or a through hole portion at a position corresponding to the image pickup means.
  2. 車両情報を表示する表示手段と、 
    前記表示手段を視認する視認者の状態を撮像可能であって、前記視認者側とは反対側となる前記表示手段の反視認者側に配置される撮像手段と、
    赤外光を前記視認者に向けて照射するように前記表示手段の前記反視認者側に配置される赤外線照射部と、 
    可視光を前記表示手段へと導くように前記表示手段の前記反視認者側に配置される光学部材とを備え、 
    前記光学部材には、前記撮像手段及び前記赤外線照射部に対応する箇所に欠落部もしくは貫通孔部が設けられていることを特徴とする車両用表示装置。     Display means for displaying vehicle information,
    An image pickup means capable of picking up an image of a state of a viewer visually recognizing the display means, the image pickup means being arranged on a side opposite to the viewer side of the display means, which is opposite to the viewer side.
    An infrared irradiation unit arranged on the side of the viewer opposite to the display unit so as to irradiate the viewer with infrared light,
    An optical member arranged on the side opposite to the viewer of the display means so as to guide visible light to the display means,
    A display device for a vehicle, wherein the optical member is provided with a missing portion or a through hole portion at a position corresponding to the image pickup means and the infrared irradiation portion.
  3. 前記光学部材は、複数個設けられていることを特徴とする請求項１または請求項２記載の車両用表示装置。  The vehicle display device according to claim 1, wherein a plurality of the optical members are provided. 
  4. 前記赤外線照射部から照射される前記赤外光は、前記表示手段を介して前記視認者側に向けて照射され、 
    前記視認者を照射後の前記赤外光は、前記表示手段を経て前記撮像手段に入射可能となっていることを特徴とする請求項２または請求項３記載の車両用表示装置。     The infrared light radiated from the infrared radiating unit is radiated toward the viewer side through the display means,
    4. The vehicle display device according to claim 2, wherein the infrared light after irradiating the viewer is allowed to enter the image pickup means via the display means.
PCT/JP2020/002505 2019-01-30 2020-01-24 Vehicle display device WO2020158602A1 (en)

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