WO2020171044A1 - Vehicle display device - Google Patents

Vehicle display device Download PDF

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Publication number
WO2020171044A1
WO2020171044A1 PCT/JP2020/006186 JP2020006186W WO2020171044A1 WO 2020171044 A1 WO2020171044 A1 WO 2020171044A1 JP 2020006186 W JP2020006186 W JP 2020006186W WO 2020171044 A1 WO2020171044 A1 WO 2020171044A1
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WO
WIPO (PCT)
Prior art keywords
viewer
infrared
display
light
unit
Prior art date
Application number
PCT/JP2020/006186
Other languages
French (fr)
Japanese (ja)
Inventor
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 WO2020171044A1 publication Critical patent/WO2020171044A1/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—Arrangement of adaptations of instruments
    • 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
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/28—Structurally-combined illuminating devices

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 outer 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 provided 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, a light source provided on the anti-viewer side of the display means so as to supply visible light to the display means, and the image pickup And a circuit board on which the light source is arranged.
  • the present invention provides a display means for displaying vehicle information, an image capturing means capable of capturing an image of a state of a viewer visually recognizing the display means, and the viewer so as to irradiate the viewer with infrared light.
  • An infrared irradiation unit provided on the side opposite to the viewer side of the display means, and a light source provided on the side opposite the viewer side of the display means so as to supply visible light to the display means; It is characterized by comprising an infrared irradiation unit and a circuit board on which the light source is arranged.
  • the present invention is capable of capturing an image of a display means for displaying vehicle information and a state of a viewer who visually recognizes the display means, and is provided on the side opposite to the viewer side of the display means which is opposite to the viewer side.
  • An image pickup unit provided, an infrared irradiation unit provided on the counter viewer side of the display unit so as to irradiate the viewer with infrared light, and the display for supplying visible light to the display unit. It is characterized by comprising a light source provided on the side opposite to the viewer of the means, a circuit board on which the image pickup means, the infrared irradiating section and the light source are arranged.
  • a case member is provided between the circuit board and the display means, and the case member includes a first hollow portion corresponding to the image pickup means and a second cavity portion corresponding to the infrared irradiation portion. And a barrier section for partitioning the first cavity section and the second cavity section from each other.
  • the protective member located on the viewer side of the display means is provided with a non-overlapping portion that does not overlap with the display means, and the light source is located on the viewer side of the circuit board.
  • the infrared irradiating section is disposed on the surface section, and the infrared irradiating section is disposed on the other surface section of the circuit board located on the side opposite to the viewer, and the infrared light emitted from the infrared irradiating section uses an optical member. It is characterized in that it is configured to be guided to the non-polymerized portion.
  • a non-overlapping portion which does not overlap with the display means is provided on the protective member located on the viewer side of the display means, and the light source is provided on one surface portion on the display means side and the display means side.
  • 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. FIG. 3 is a plan view schematically showing the positional relationship among the camera module, the optical member, and the case member according to the same embodiment.
  • the block diagram which shows the electric constitution of the display device for vehicles by the same embodiment.
  • Sectional drawing of the display apparatus for vehicles by the modification 2 of the embodiment The block diagram which shows the electric constitution of the display device for vehicles by the same embodiment.
  • FIG. 12 is a sectional view taken along line FF of FIG. 11.
  • FIG. 8 is a vertical cross-sectional view of a vehicle display device according to a modified example 5 of the same embodiment.
  • FIG. 14 is an enlarged sectional view of an essential part showing an enlarged part G in FIG. 13. Sectional drawing of the vehicle display apparatus by the modification 6 of the embodiment.
  • 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 as an example with reference to FIGS. 1 to 6.
  • the viewer side who looks straight (visually) to 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). ..
  • 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 well-known liquid crystal display panel in which a front-side polarizing plate and a rear-side 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 controls display of the display panel 10 and lighting of the light source 30, and also controls the camera module 50 (imaging means and infrared rays described later).
  • the control unit 21 as a microcomputer for controlling the operation of the irradiation unit), the light source 30, the camera module 50 (the imaging unit and the infrared irradiation unit), and various circuit components such as resistors and capacitors are arranged in the wiring pattern. Conductive connection.
  • the circuit board 20 is mounted (disposed) with the light source 30, the image pickup means, and the infrared irradiation section (the control section 21).
  • the light source 30, the imaging unit, and the infrared irradiation unit are mounted (disposed) on the front side of the circuit board 20, and the control unit 21 is mounted (disposed) on the back side of the circuit board 20.
  • the circuit board 20 is electrically connected to the display panel 10 using a flexible wiring board (not shown).
  • the light source 30 a plurality of chip type light emitting diodes that emit light of an appropriate color can be applied, and the display panel emits (provides) light (visible light) toward the optical member 60 (display panel 10). It is provided on the back side of 10.
  • the protective member 40 is a substantially flat plate-shaped 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 peripheral edge of the rear surface of the protective member 40.
  • the light shielding part 41 is formed of, for example, a black print layer.
  • the protective member 40 may be bonded 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 seated 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 like. The corresponding position is arranged behind the display panel 10.
  • the camera module 50 is arranged on the back side of the display panel 10 (the front and back surfaces have the polarizing plates on 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 improve the commercial property (design property) of the vehicle instrument D.
  • the camera module 50 also includes an imaging unit 51 capable of imaging 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 provided at a position corresponding to the upper center of the display panel 10 and behind the display panel 10.
  • the infrared irradiation unit 52 is provided behind the display panel 10 so as to irradiate the viewer E with infrared light.
  • the infrared irradiation unit 52 can apply 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.
  • the light source 30 and the imaging unit 51 are mounted (disposed) on the front side of the circuit board 20.
  • 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 the case of 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 back 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 position corresponding to the image pickup means 51 and the infrared irradiation unit 52 (that is, the camera module 50) as shown in FIG. ..
  • the notch portion 61a is configured as a notch portion obtained by notching the portion corresponding to the center of the upper side of the display panel 10 into 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 diffusing sheet 62 for example, an optical film in which light diffusing particles are dispersed in a light transmissive resin film can be used.
  • 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 a component of the optical member 60, the light diffusion sheet 62 is communicated with the portion corresponding to the imaging unit 51 and the infrared irradiation unit 52 (that is, the camera module 50) (the communication with the missing portion 61a). ) 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 center of the upper side of the display panel 10 in a substantially U shape.
  • the case member 70 is a resin case formed of a synthetic resin material, and is provided between the display panel 10 and the circuit board 20.
  • the case member 70 is a main body portion 71 that is a standing wall portion that is formed in a substantially U shape so as to surround the camera module 50, and a first cavity that is a void provided so as to correspond to the image pickup means 51.
  • the part 72, the second cavity part 73 which is a space provided so as to correspond to the infrared irradiation part 52, and the main body part 71 so as to partition the first cavity part 72 and the second cavity part 73. It is provided with a barrier section 74 which is a partition wall provided integrally, and is fixedly held to the circuit board 20 (or the case 80) by using an appropriate fixing means.
  • the barrier section 74 functions as a light-shielding wall that blocks the infrared light emitted from the infrared irradiation section 52 from being reflected on the rear surface of the display panel 10 to the rear side and invading into the first cavity 72 side.
  • the housing 80 is a resin instrument housing that constitutes an outer case of the vehicle instrument D, and has a substantially box shape with an opening on the display panel 10 side.
  • the housing 80 includes a bottom wall portion 81 that covers the back side of the circuit board 20 and a peripheral wall portion 82 that surrounds the side of the display panel 10.
  • the instrument panel 90 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 90 has an opening wall 91 for making the vehicle information visible from the viewer E side.
  • the vehicle instrument D is configured by the above parts.
  • the infrared light emitted from the infrared emitting unit 52 is emitted toward the front side through the display panel 10 (that is, passing 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 capture 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 an operation process 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 drowsy based on the image captured by the image capturing unit 51, and is in a state where the viewer E is performing a look-aside operation. A process of determining the state of the viewer E such as whether or not is executed.
  • the speaker (not shown) mounted on the vehicle instrument D causes a warning sound (not shown) for calling attention to the viewer E.
  • 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 for calling 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.
  • An infrared irradiating section 52 provided on the back side of the display panel 10 so as to irradiate toward the display panel, and a light source 30 provided on the back side of the display panel 10 for supplying the illumination light (visible light) to the display panel 10.
  • the circuit board 20 is provided with the image pickup means 51, the infrared irradiation section 52, and the light source 30.
  • the camera module 50 can be mounted on the circuit board 20 for mounting the light source 30, and it is not necessary to separately provide a dedicated module board for mounting the camera module 50. There is also an advantage that the number of constituent parts can be reduced and an increase in cost can be suppressed.
  • 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 irradiator 52 may be provided at any position as long as it can irradiate the viewer E with infrared light.
  • translucent parts 92 are provided at appropriate portions (for example, the opening wall 91) of the instrument panel 90, and the translucent parts are provided.
  • the infrared irradiation unit 52 may be arranged in the internal space S of the instrument panel 90 so as to correspond to the light transmitting unit 92 so that infrared light is emitted toward the viewer E through 92.
  • the image pickup means 51 that can image the state of the viewer E and is provided on the back side of the display panel 10, and the infrared irradiation unit 52 that irradiates the viewer E with infrared light.
  • a light source 30 provided on the rear side of the display panel 10 so as to supply the illumination light (visible light) to the display panel 10, and a circuit board 20 on which the image pickup means 51 and the light source 30 are mounted (disposed).
  • the optical member 60 (prism sheet) is used.
  • 61 and the light diffusion sheet 62) are provided with missing portions 61a and 62a (or through-hole portions 61b and 62b which will be described later in detail) at locations corresponding to the image pickup means 51.
  • the barrier portion 74 of the case member 70 can be eliminated, and the image pickup means 51 is arranged inside the main body portion 71.
  • Modification 2 Further, as a further application example of Modification 1, the imaging unit 51 and the infrared irradiation unit 52 may not be integrated, and the imaging unit 51 is in a state of the viewer E who visually recognizes the display panel 10. It can be provided at any position as long as it can capture an image.
  • the image pickup means 51 may be installed on the upper portion 93 of the instrument panel 90 in front of the driver's seat of the vehicle 100.
  • 110 indicates a windshield of the vehicle 100.
  • the image pickup means 51 capable of picking up the state of the viewer E who visually recognizes the display panel 10 and the infrared light are emitted toward the viewer E.
  • the infrared irradiation unit 52 provided on the back side of the display panel 10
  • the light source 30 provided on the back side of the display panel 10 so as to supply the illumination light (visible light) to the display panel 10
  • the infrared irradiation unit 52 The circuit board 20 on which the light source 30 and the light source 30 are mounted (disposed) is provided, and even when the configuration is adopted, the state of the viewer E can be detected based on the image captured by the image capturing unit 51. Is possible.
  • the infrared irradiation unit is provided in the optical member 60 (prism sheet 61 and light diffusion sheet 62). Missing portions 61a and 62a (or through-hole portions 61b and 62b described in detail later) are provided at locations corresponding to 52. Further, the barrier portion 74 of the case member 70 can be omitted, and the infrared irradiation unit 52 is arranged inside the main body 71.
  • the prism sheet 61 and the light diffusing sheet 62 are provided with the cutouts 61a and 62a formed of cutouts at the upper center thereof.
  • the prism sheet 61 is provided with through holes 61b at positions corresponding to the imaging means 51 and the infrared irradiation section 52, and the light diffusion sheet 62 is provided with the imaging means 51.
  • a through hole portion 62b (which communicates with the through hole portion 61b) may be provided at a location corresponding to the infrared irradiation portion 52.
  • the through-hole portions 61b and 62b are provided as substantially rectangular through-holes that penetrate the front and back sides at the upper center of the prism sheet 61 and the light diffusion sheet 62.
  • FIGS. 11 and 12 show Modification 4 of the present invention.
  • the infrared irradiation unit 52 mounted on the front side of the circuit board 20 is mounted on the rear side of the circuit board 20. That is, when the surface located on the front side of the circuit board 20 is one surface portion P1 and the surface located on the back side of the circuit board 20 (the side opposite to the one surface portion P1) is the other surface portion P2, the light source 30 Is mounted on one surface portion P1 located on the front side of the circuit board 20, and the infrared irradiation unit 52 is mounted on the other surface portion P2 located on the back side of the circuit board 20.
  • the case member 70, the instrument panel 90, and the light shielding portion 41 provided on the protection member 40 adopted in the above-described embodiment are omitted.
  • the protective member 40 located on the front side of the display panel 10 has an outer shape slightly larger (slightly) than the outer shape of the display panel 10, and the vehicle instrument D is viewed from the front side. It has a peripheral edge portion 42 located (extruded) outside the display panel 10 when the display panel 10 is opened.
  • the peripheral portion 42 is configured as a non-overlapping portion that does not overlap the display panel 10 when the vehicle instrument D is viewed from the front side. That is, this means that the protective member 40 is provided with the peripheral edge portion 42 as a non-overlapping portion that does not overlap the display panel 10.
  • the infrared irradiation unit 52 in the fourth modification is located at the center of the upper side of the vehicle instrument D in FIG. 11, and the other infrared irradiation unit 52 is arranged so that the infrared light irradiation direction is toward the peripheral wall portion 82 side of the housing 80. It is mounted on the end of the surface portion P2. That is, the infrared irradiation unit 52 is mounted on the end portion of the other surface portion P2 facing the back side of the circuit board 20 so that the irradiation direction of the infrared light is the horizontal direction (direction along the other surface portion P2). ..
  • the image pickup means 51 and the infrared irradiation unit 52 are not mounted on the one surface portion P1, the missing portions 61a and 62a (or the through hole portions 61b and 62b) should be eliminated. It is possible to mount a plurality of light sources 30 on one surface portion P1 corresponding to all the areas of the display surface 11, and the entire area of the display surface 11 can be used as a visual information area (display surface 11 effective display areas can be secured to the maximum).
  • the infrared light emitted from the infrared irradiation unit 52 is configured to be guided to the peripheral edge 42 by using the light guide member 120 as an optical member.
  • the light guide member 120 is provided at the upper center of the vehicle instrument D in order to guide the infrared light emitted from the infrared irradiation unit 52 to the peripheral portion 42.
  • the light guide member 120 is a substantially columnar light guide body formed of, for example, a translucent synthetic resin material, and is fixed to the peripheral wall portion 82 using, for example, an appropriate fixing means.
  • the light guide member 120 receives the infrared light emitted from the infrared irradiator 52 and the infrared light introduced into the light guide member 120 through the light receiver 121 to the front side (peripheral edge 42 side). It has a reflecting portion 122 for reflecting toward the edge portion and an emitting portion 123 for emitting the infrared light reflected by the reflecting portion 122 toward the peripheral edge portion 42.
  • the light receiving section 121 is provided on the back side of the light guide member 120 so as to face the light emitting surface of the infrared irradiation section 52.
  • the reflecting portion 122 is configured as an inclined reflecting surface located on the right side of the light receiving portion 121 in FIG. 12 so as to face the light receiving portion 121.
  • the emitting portion 123 is provided on the front side of the light guide member 120 so as to face the peripheral portion 42, and is configured as an emitting surface from which the infrared light reflected by the reflecting portion 122 is emitted.
  • the infrared light emitted laterally (rightward in FIG. 12) from the infrared irradiation unit 52 is introduced into the light guide member 120 through the light receiving unit 121, and then reflected.
  • the infrared light reflected by the portion 102 is reflected and guided toward the front side (vertical direction when viewed in FIG. 12) and reaches the peripheral portion 42 located right above the emitting portion 123 via the emitting portion 123.
  • the infrared light reaching the peripheral portion 42 is emitted toward the front side through the protective member 40 and reaches the face of the viewer E.
  • the infrared light after irradiating the viewer E face of the viewer E
  • the state of the viewer E can be detected based on the image captured by the imaging unit 51.
  • the number of the infrared irradiation units 52 may be plural, and for example, the infrared irradiation units 52 may be provided at the upper center and the lower center of the vehicle instrument D in FIG. At this time, a plurality of light guide members 120 may be provided so as to correspond to the installation positions of the individual infrared irradiation units 52.
  • the image pickup means 51 is installed on the upper portion 93 of the instrument panel 90, but the image pickup means 51 may be mounted on the front side of the circuit board 20 in the same manner as in the above embodiment. Good.
  • FIGS. 13 and 14 show Modification 5 of the invention.
  • the configuration of the modified example 4 is used as a basic configuration, and a display unit 130 unitized (modularized) with respect to the basic configuration is applied as a display medium.
  • the display unit 130 includes the display panel 10 used in the embodiment, the light guide 131a, the light source 30 used in the embodiment, the flexible wiring board 131b, and the like.
  • a metal frame member 133 that houses at least the mounted flexible wiring board 131b is provided.
  • the flexible wiring board 131b corresponds to the circuit board described in claim 6 of the claims described later.
  • the light guide 131 a is made of a substantially flat plate-shaped translucent synthetic resin, and is arranged along the back surface of the display panel 10. In other words, the light guide 131a is arranged in the illumination optical path from the light source 30 to the display panel 10.
  • the plurality of light sources 30 are visible light sources that are arranged in a line along one side surface Y located on the right side of the light guide 131a in FIG.
  • the flexible wiring board 131b is provided so as to face the one side surface Y of the light guide 131a, and the infrared irradiation section 52 is mounted on the other surface portion T2 opposite to the one surface portion T1.
  • the light source 30 is not mounted on the circuit board 20 adopted in the above-described embodiment, and instead of the prism sheet 61 and the light diffusion sheet 62 adopted in the above-described embodiment, the light guide 131a, The resin case 132 is used.
  • the metal frame member 133 is press-molded into a substantially frame shape, and houses the display panel 10, the light guide 131a, the light source 30, the resin case 132, and the like inside.
  • An opening 133a formed of a substantially rectangular opening window is provided at a portion of the frame member 133 corresponding to the display surface 11.
  • the side wall portion of the frame member 133 is provided with a penetrating portion 133b having a penetrating hole shape that does not interfere with the arrangement position of the infrared irradiating portion 52. That is, this means that the infrared irradiation unit 52 is mounted on the other surface portion T2 of the flexible wiring board 131b so as to correspond to the penetrating portion 133b provided on the frame member 133.
  • the technique disclosed in the modification 4 described above is adopted, and the infrared light emitted from the infrared irradiation unit 52 is transmitted to the frame member 133 (the side wall portion) and the peripheral wall portion 82. It is configured to be guided to the peripheral edge portion 42 by utilizing the light guide member 120 arranged between the two.
  • the infrared light emitted laterally (rightward when viewed in FIG. 14) from the infrared irradiating section 52 sequentially passes through the light receiving section 121, the reflecting section 122, the emitting section 123, and the peripheral section 42 (protective member 40). It is irradiated toward the front side and reaches the face of the viewer E. Further, the infrared light after irradiating the viewer E (face of the viewer E) can be reflected in the opposite direction (back side) and incident on the image pickup means 51 installed on the upper portion 93 of the instrument panel 90. Has become.
  • the state of the viewer E can be detected based on the image captured by the imaging unit 51.
  • the number of the infrared irradiation units 52 may be plural, and for example, the infrared irradiation units 52 may be provided near the upper left corner and near the upper right corner of the vehicle instrument D.
  • a plurality of light guide members 120 may be provided so as to correspond to the installation positions of the individual infrared irradiation units 52.
  • the circuit board 20 can be freely arranged corresponding to the shape of the housing 80.
  • FIG. 15 shows a modification 6 of the invention.
  • the structure of the modified example 4 is used as a basic structure, and in addition to the basic structure, a reflection plate 140 having a function of reflecting infrared light is used as an optical member instead of the light guide member 120. ing.
  • the reflection plate 140 is inclinedly arranged at the position where the reflection portion 122 of the light guide member 120 disclosed in Modification 4 is formed, and is fixed to the peripheral wall portion 82 by using a fixing means as appropriate.
  • Infrared light emitted from the infrared irradiation unit 52 is configured to be guided to the peripheral edge portion 42 by using a reflection plate 140 located on the right side of the infrared irradiation unit 52 as shown by an arrow in FIG. .. Then, the infrared light reaching the peripheral portion 42 is irradiated toward the front side through the protective member 40 and reaches the face of the viewer E. Further, the infrared light after irradiating the viewer E (face of the viewer E) is reflected in the opposite direction and can enter the image pickup means 51 installed on the upper portion 93 of the instrument panel 90.
  • Display panel (display means) 11 Display surface 20 circuit board 21 Control unit 30 light sources 40 Protective material 42 Peripheral part (non-overlapping part) 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 Case member 71 Main body 72 First cavity 73 Second cavity 74 Barrier 80 housing 90 Instrument panel 91 Opening wall 92 Translucent part 120 Light guide member (optical member) 130 display unit 131 Lighting means 131b Flexible wiring board (circuit board) 133 frame member 133b penetration part 140 Reflector (optical member) E Viewer (driver) One side of P1 and T1 P2, T2 The other surface

Abstract

Provided is a vehicle display device capable of detecting the state of a viewer. The vehicle display device is provided with: a display panel 10 that displays vehicle information; an imaging means 51 capable of capturing the state of a viewer who views the display panel 10 and provided on an opposite viewer side of the display panel 10 opposite to the viewer side; an infrared radiation part 52 provided on the opposite viewer side of the display panel 10 so as to radiate infrared light toward the viewer; a light source 30 provided on the opposite viewer side of the display panel 10 so as to supply visible light to the display panel 10; and a circuit board 20 on which the imaging means 51, the infrared radiation part 52, and the light source 30 are disposed.

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 outer case of the display device.
特開２０１８－５４２９１号公報JP, 2018-54291, A
　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 sits 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 motion of the driver's face and the like. Practical application of the technology of installing the above-mentioned in a vehicle instrument is getting attention. By the way, the vehicle display device described in Patent Document 1 does not assume a configuration in which the camera module is mounted on the vehicle display device in order to detect the state of the driver. 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設けられる撮像手段と、赤外光を前記視認者に向けて照射する赤外線照射部と、前記表示手段に可視光を供給するように前記表示手段の前記反視認者側に設けられる光源と、前記撮像手段と前記光源とが配設される回路基板とを備え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 provided 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, a light source provided on the anti-viewer side of the display means so as to supply visible light to the display means, and the image pickup And a circuit board on which the light source is arranged.
　また本発明は、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設けられる赤外線照射部と、前記表示手段に可視光を供給するように前記表示手段の前記反視認者側に設けられる光源と、前記赤外線照射部と前記光源とが配設される回路基板とを備えていることを特徴とする。 Further, the present invention provides a display means for displaying vehicle information, an image capturing means capable of capturing an image of a state of a viewer visually recognizing the display means, and the viewer so as to irradiate the viewer with infrared light. An infrared irradiation unit provided on the side opposite to the viewer side of the display means, and a light source provided on the side opposite the viewer side of the display means so as to supply visible light to the display means; It is characterized by comprising an infrared irradiation unit and a circuit board on which the light source is arranged.
　また本発明は、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設けられる撮像手段と、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設けられる赤外線照射部と、前記表示手段に可視光を供給するように前記表示手段の前記反視認者側に設けられる光源と、前記撮像手段と前記赤外線照射部と前記光源とが配設される回路基板とを備えていることを特徴とする。 Further, the present invention is capable of capturing an image of a display means for displaying vehicle information and a state of a viewer who visually recognizes the display means, and is provided on the side opposite to the viewer side of the display means which is opposite to the viewer side. An image pickup unit provided, an infrared irradiation unit provided on the counter viewer side of the display unit so as to irradiate the viewer with infrared light, and the display for supplying visible light to the display unit. It is characterized by comprising a light source provided on the side opposite to the viewer of the means, a circuit board on which the image pickup means, the infrared irradiating section and the light source are arranged.
　また本発明は、前記回路基板と前記表示手段との間にはケース部材が設けられ、前記ケース部材は、前記撮像手段に対応する第１の空洞部と、前記赤外線照射部に対応する第２の空洞部と、前記第１の空洞部と前記第２の空洞部とを区画するための障壁部とを備えていることを特徴とする。 Further, according to the present invention, a case member is provided between the circuit board and the display means, and the case member includes a first hollow portion corresponding to the image pickup means and a second cavity portion corresponding to the infrared irradiation portion. And a barrier section for partitioning the first cavity section and the second cavity section from each other.
　また本発明は、前記表示手段の前記視認者側に位置する保護部材には前記表示手段と重なり合わない非重合部が設けられ、前記光源が前記回路基板の前記視認者側に位置する一方の面部に配設されるとともに前記赤外線照射部が前記回路基板の前記反視認者側に位置する他方の面部に配設され、前記赤外線照射部から照射される前記赤外光が光学部材を利用して前記非重合部に導かれる構成としたことを特徴とする。 In the present invention, the protective member located on the viewer side of the display means is provided with a non-overlapping portion that does not overlap with the display means, and the light source is located on the viewer side of the circuit board. The infrared irradiating section is disposed on the surface section, and the infrared irradiating section is disposed on the other surface section of the circuit board located on the side opposite to the viewer, and the infrared light emitted from the infrared irradiating section uses an optical member. It is characterized in that it is configured to be guided to the non-polymerized portion.
　また本発明は、前記表示手段の前記視認者側に位置する保護部材には前記表示手段と重なり合わない非重合部が設けられ、前記表示手段と前記表示手段側となる一方の面部に前記光源が配設された前記回路基板とを少なくとも収容するフレーム部材を備え、前記赤外線照射部は、前記フレーム部材に設けられた貫通部に対応するように前記一方の面部とは反対側となる前記回路基板の他方の面部に配設され、前記赤外線照射部から照射される前記赤外光が光学部材を利用して前記非重合部に導かれる構成としたことを特徴とする。 Further, according to the present invention, a non-overlapping portion which does not overlap with the display means is provided on the protective member located on the viewer side of the display means, and the light source is provided on one surface portion on the display means side and the display means side. A circuit member having at least the circuit board provided therein, the infrared irradiating portion being opposite to the one surface portion so as to correspond to a penetrating portion provided in the frame member. It is characterized in that it is arranged on the other surface portion of the substrate, and the infrared light emitted from the infrared irradiation portion is guided to the non-overlapping portion using an optical member.
　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ケース部材との位置関係を模式的に示す平面図。FIG. 3 is a plan view schematically showing the positional relationship among the camera module, the optical member, and the case member according to 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. 同実施形態の変形例１による車両用表示装置の断面図。Sectional drawing of the vehicle display apparatus by the modification 1 of the same embodiment. 同実施形態の変形例２による撮像手段がインストルメントパネルに設置された状態を模式的に示す図。The figure which shows typically the state which the imaging means by the modification 2 of the same embodiment was installed in the instrument panel. 同実施形態の変形例２による車両用表示装置の断面図。Sectional drawing of the display apparatus for vehicles by the modification 2 of the embodiment. 同実施形態の変形例３によるカメラモジュールと光学部材とケース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 by the modification 3 of the embodiment, an optical member, and a case member. 同実施形態の変形例４による車両用表示装置の正面図。The front view of the display device for vehicles by the modification 4 of the embodiment. 図１１のＦ－Ｆ断面図。FIG. 12 is a sectional view taken along line FF of FIG. 11. 同実施形態の変形例５による車両用表示装置の縦断面図。FIG. 8 is a vertical cross-sectional view of a vehicle display device according to a modified example 5 of the same embodiment. 図１３中、Ｇ部を拡大して示す要部拡大断面図。FIG. 14 is an enlarged sectional view of an essential part showing an enlarged part G in FIG. 13. 同実施形態の変形例６による車両用表示装置の断面図。Sectional drawing of the vehicle display apparatus by the modification 6 of the embodiment.
　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。 Hereinafter, a case where 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 as an example with reference to FIGS. 1 to 6. In the following description, the viewer side who looks straight (visually) to 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、表示パネル１０と回路基板２０との間に位置するケース部材７０と、表示パネル１０と回路基板２０とカメラモジュール５０と光学部材６０とケース部材７０とを収容する筐体８０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）９０とを備えている。 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 behind the circuit board 10, a plurality of light sources 30 mounted on the front side of the circuit board 20, a protective member 40 for 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, and a position between the display panel 10 and the circuit board 20. A case member 70, a display panel 10, a circuit board 20, a camera module 50, an optical member 60, and a casing member 80 for accommodating the case member 70, and an instrument panel (instrument panel) 90 for concealing the outer edge of the protective member 40. It has and.
　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-side polarizing plate and a rear-side 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、カメラモジュール５０（前記撮像手段及び前記赤外線照射部）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 controls display of the display panel 10 and lighting of the light source 30, and also controls the camera module 50 (imaging means and infrared rays described later). The control unit 21 as a microcomputer for controlling the operation of the irradiation unit), the light source 30, the camera module 50 (the imaging unit and the infrared irradiation unit), and various circuit components such as resistors and capacitors are arranged in the wiring pattern. Conductive connection.
　つまり、本例の場合、回路基板２０には、（制御部２１と）光源３０と前記撮像手段と前記赤外線照射部とが実装（配設）されている。例えば、光源３０と前記撮像手段と前記赤外線照射部とが回路基板２０の前方側に実装（配設）され、制御部２１が回路基板２０の背後側に実装（配設）されている。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。 That is, in the case of the present example, the circuit board 20 is mounted (disposed) with the light source 30, the image pickup means, and the infrared irradiation section (the control section 21). For example, the light source 30, the imaging unit, and the infrared irradiation unit are mounted (disposed) on the front side of the circuit board 20, and the control unit 21 is mounted (disposed) on the back side of the circuit board 20. The circuit board 20 is electrically connected to the display panel 10 using a flexible wiring board (not shown).
　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（表示パネル１０）に向けて光（可視光）を発する（供給する）ように表示パネル１０の背後側に設けられる。 As the light source 30, a plurality of chip type light emitting diodes that emit light of an appropriate color can be applied, and the display panel emits (provides) light (visible light) toward the optical member 60 (display panel 10). It is provided on the back side of 10.
　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 plate-shaped 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 peripheral edge of the rear surface of the protective member 40. The light shielding part 41 is formed of, for example, a black print layer. The protective member 40 may be bonded 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の上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 seated 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 like. The corresponding position is arranged 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 and back surfaces have the polarizing plates on 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 improve 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。 The camera module 50 also includes an imaging unit 51 capable of imaging 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の前記上側中央に対応する位置であって、表示パネル１０の背後側に設けられる。 The image pickup means 51 is a camera having sensitivity in the near infrared region, and is provided at a position corresponding to the upper 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の背後側に設けられる。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、制御部２１や光源３０、撮像手段５１とともに回路基板２０の前方側に実装（配設）される。 The infrared irradiation unit 52 is provided behind the display panel 10 so as to irradiate the viewer E with infrared light. The infrared irradiation unit 52 can apply 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. The light source 30 and the imaging unit 51 are mounted (disposed) on the front side of the circuit board 20.
　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 the case of 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 back 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の前記上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 position corresponding to the image pickup means 51 and the infrared irradiation unit 52 (that is, the camera module 50) as shown in FIG. .. The notch portion 61a is configured as a notch portion obtained by notching the portion corresponding to the center of the upper side of the display panel 10 into 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 diffusing sheet 62, for example, an optical film in which light diffusing particles are dispersed in a light transmissive resin film can be used.
　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の前記上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 a component of the optical member 60, the light diffusion sheet 62 is communicated with the portion corresponding to the imaging unit 51 and the infrared irradiation unit 52 (that is, the camera module 50) (the communication with the missing portion 61a). ) 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 center of the upper side of the display panel 10 in a substantially U shape.
　ケース部材７０は、合成樹脂材料によって形成された樹脂ケースであり、表示パネル１０と回路基板２０との間に設けられる。  The case member 70 is a resin case formed of a synthetic resin material, and is provided between the display panel 10 and the circuit board 20. 
　また、ケース部材７０は、カメラモジュール５０を取り囲むように略コの字状に形成された立壁部である本体部７１と、撮像手段５１に対応するように設けられる空所である第１の空洞部７２と、赤外線照射部５２に対応するように設けられる空所である第２の空洞部７３と、第１の空洞部７２と第２の空洞部７３とを区画するように本体部７１に一体的に設けられた仕切壁である障壁部７４とを備え、適宜固定手段を用いて回路基板２０（もしくは筐体８０）に固定保持される。 Further, the case member 70 is a main body portion 71 that is a standing wall portion that is formed in a substantially U shape so as to surround the camera module 50, and a first cavity that is a void provided so as to correspond to the image pickup means 51. The part 72, the second cavity part 73 which is a space provided so as to correspond to the infrared irradiation part 52, and the main body part 71 so as to partition the first cavity part 72 and the second cavity part 73. It is provided with a barrier section 74 which is a partition wall provided integrally, and is fixedly held to the circuit board 20 (or the case 80) by using an appropriate fixing means.
　障壁部７４は、赤外線照射部５２から照射される赤外光が表示パネル１０後面で背後側に反射して、それが第１の空洞部７２側に侵入するのを遮る遮光壁としての機能を有している。 The barrier section 74 functions as a light-shielding wall that blocks the infrared light emitted from the infrared irradiation section 52 from being reflected on the rear surface of the display panel 10 to the rear side and invading into the first cavity 72 side. Have
　筐体８０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８０は、回路基板２０の背後側を覆う底壁部８１と、表示パネル１０の側方を囲む周壁部８２とを備えている。 The housing 80 is a resin instrument housing that constitutes an outer case of the vehicle instrument D, and has a substantially box shape with an opening on the display panel 10 side. In addition, the housing 80 includes a bottom wall portion 81 that covers the back side of the circuit board 20 and a peripheral wall portion 82 that surrounds the side of the display panel 10.
　インストルメントパネル９０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９０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９１を有する。 The instrument panel 90 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 90 has an opening wall 91 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 configured by the above parts. In such a configuration, the infrared light emitted from the infrared emitting unit 52 is emitted toward the front side through the display panel 10 (that is, passing 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 capture 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 an operation process 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 drowsy based on the image captured by the image capturing unit 51, and is in a state where the viewer E is performing a look-aside operation. 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。 When the control unit 21 determines that the viewer E is in a drowsiness state, for example, the speaker (not shown) mounted on the vehicle instrument D causes a warning sound (not shown) for calling attention to the viewer E. 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 for calling 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の背後側に設けられる赤外線照射部５２と、表示パネル１０に前記照明光（可視光）を供給するように表示パネル１０の背後側に設けられる光源３０と、撮像手段５１と赤外線照射部５２と光源３０とが実装（配設）される回路基板２０とを備えているものである。 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 provided on the back side of the display panel 10 so as to irradiate toward the display panel, and a light source 30 provided on the back side of the display panel 10 for supplying the illumination light (visible light) to the display panel 10. The circuit board 20 is provided with the image pickup means 51, the infrared irradiation section 52, and the light source 30.
　従って、撮像手段５１と赤外線照射部５２との双方が（単一の）回路基板２０の前方側に実装される構成を適用した場合であっても、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可能となる。また、この場合、カメラモジュール５０を光源３０実装用の回路基板２０に実装することが可能となり、カメラモジュール５０を実装するための専用のモジュール基板を別途設ける必要がなくなるため、車両用計器Ｄを構成する部品点数が削減され、コスト上昇を抑制することができるという利点もある。 Therefore, even when the configuration in which both the image pickup unit 51 and the infrared irradiation unit 52 are mounted on the front side of the (single) circuit board 20 is applied, the viewer based on the image picked up by the image pickup unit 51 It becomes possible to detect the state of E. Further, in this case, the camera module 50 can be mounted on the circuit board 20 for mounting the light source 30, and it is not necessary to separately provide a dedicated module board for mounting the camera module 50. There is also an advantage that the number of constituent parts can be reduced and an increase in cost can be suppressed.
　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。例えば下記に示す変形例１～３を挙げることができる。 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. For example, the following modified examples 1 to 3 can be given.
（変形例１）上述した実施形態では、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。 (Modification 1) In the above-described 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 irradiator 52 may be provided at any position as long as it can irradiate the viewer E with infrared light.
　具体的には、本実施形態の変形例１として図７に示すようにインストルメントパネル９０の適宜箇所（例えば開口壁９１）に（１つ以上の）透光部９２を設け、当該透光部９２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９０の内部空間Ｓにて透光部９２に対応させて赤外線照射部５２を配置してもよい。 Specifically, as a modified example 1 of the present embodiment, as shown in FIG. 7, (one or more) translucent parts 92 are provided at appropriate portions (for example, the opening wall 91) of the instrument panel 90, and the translucent parts are provided. The infrared irradiation unit 52 may be arranged in the internal space S of the instrument panel 90 so as to correspond to the light transmitting unit 92 so that infrared light is emitted toward the viewer E through 92.
　つまり、この変形例１では、視認者Ｅの状態を撮像可能であって表示パネル１０の背後側に設けられる撮像手段５１と、赤外光を視認者Ｅに向けて照射する赤外線照射部５２と、表示パネル１０に前記照明光（可視光）を供給するように表示パネル１０の背後側に設けられる光源３０と、撮像手段５１と光源３０とが実装（配設）される回路基板２０とを備える構成となり、当該構成を採用した場合であっても、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可能となる。 That is, in the first modified example, the image pickup means 51 that can image the state of the viewer E and is provided on the back side of the display panel 10, and the infrared irradiation unit 52 that irradiates the viewer E with infrared light. A light source 30 provided on the rear side of the display panel 10 so as to supply the illumination light (visible light) to the display panel 10, and a circuit board 20 on which the image pickup means 51 and the light source 30 are mounted (disposed). With this configuration, even when the configuration is adopted, the state of the viewer E can be detected based on the image captured by the image capturing unit 51.
　なお、この変形例１のようにインストルメントパネル９０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（もしくは後で詳述する貫通孔部６１ｂ、６２ｂ）が設けられる。また、ケース部材７０の障壁部７４は廃止することができ、本体部７１の内部に撮像手段５１が配置される。 When the configuration in which the infrared irradiating section 52 installed in the internal space S of the instrument panel 90 irradiates the viewer E with infrared light as in the first modification, the optical member 60 (prism sheet) is used. 61 and the light diffusion sheet 62) are provided with missing portions 61a and 62a (or through- hole portions 61b and 62b which will be described later in detail) at locations corresponding to the image pickup means 51. Further, the barrier portion 74 of the case member 70 can be eliminated, and the image pickup means 51 is arranged inside the main body portion 71.
（変形例２）また、変形例１の更なる応用例として撮像手段５１と赤外線照射部５２とは一体となっていなくてもよく、撮像手段５１は表示パネル１０を視認する視認者Ｅの状態を撮像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。例えば本実施形態の変形例２として図８に示すように、撮像手段５１を車両１００の運転席前方となるインストルメントパネル９０の上部９３に設置する構成としてもよい。なお、図８において、１１０は、車両１００のフロントガラス（ウインドシールド）を示す。 (Modification 2) Further, as a further application example of Modification 1, the imaging unit 51 and the infrared irradiation unit 52 may not be integrated, and the imaging unit 51 is in a state of the viewer E who visually recognizes the display panel 10. It can be provided at any position as long as it can capture an image. For example, as a second modification of the present embodiment, as shown in FIG. 8, the image pickup means 51 may be installed on the upper portion 93 of the instrument panel 90 in front of the driver's seat of the vehicle 100. In FIG. 8, 110 indicates a windshield of the vehicle 100.
　つまり、この変形例２では、図８、図９に示すように表示パネル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の背後側に設けられる赤外線照射部５２と、表示パネル１０に前記照明光（可視光）を供給するように表示パネル１０の背後側に設けられる光源３０と、赤外線照射部５２と光源３０とが実装（配設）される回路基板２０とを備える構成となり、当該構成を採用した場合であっても、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可能となる。 That is, in the second modification, as shown in FIGS. 8 and 9, the image pickup means 51 capable of picking up the state of the viewer E who visually recognizes the display panel 10 and the infrared light are emitted toward the viewer E. As described above, the infrared irradiation unit 52 provided on the back side of the display panel 10, the light source 30 provided on the back side of the display panel 10 so as to supply the illumination light (visible light) to the display panel 10, and the infrared irradiation unit 52. The circuit board 20 on which the light source 30 and the light source 30 are mounted (disposed) is provided, and even when the configuration is adopted, the state of the viewer E can be detected based on the image captured by the image capturing unit 51. Is possible.
　なお、この変形例２のように車両１００におけるインストルメントパネル９０の上部９３に撮像手段５１を設け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、赤外線照射部５２に対応する箇所に欠落部６１ａ、６２ａ（もしくは後で詳述する貫通孔部６１ｂ、６２ｂ）が設けられる。また、ケース部材７０の障壁部７４は廃止することができ、本体部７１の内部に赤外線照射部５２が配置される。 When adopting the configuration in which the image pickup means 51 is provided on the upper portion 93 of the instrument panel 90 in the vehicle 100 as in the second modification, the infrared irradiation unit is provided in the optical member 60 (prism sheet 61 and light diffusion sheet 62). Missing portions 61a and 62a (or through- hole portions 61b and 62b described in detail later) are provided at locations corresponding to 52. Further, the barrier portion 74 of the case member 70 can be omitted, and the infrared irradiation unit 52 is arranged inside the main body 71.
（変形例３）上述した実施形態及び変形例１、２では、プリズムシート６１、光拡散シート６２の前記上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、これに代えて本実施形態の変形例３として図１０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の前記上側中央にて、表裏を貫通する略矩形の貫通孔として設けられる。 (Modification 3) In the above-described embodiment and modifications 1 and 2, the prism sheet 61 and the light diffusing sheet 62 are provided with the cutouts 61a and 62a formed of cutouts at the upper center thereof. Instead, as a modified example 3 of the present embodiment, as shown in FIG. 10, the prism sheet 61 is provided with through holes 61b at positions corresponding to the imaging means 51 and the infrared irradiation section 52, and the light diffusion sheet 62 is provided with the imaging means 51. Also, a through hole portion 62b (which communicates with the through hole portion 61b) may be provided at a location corresponding to the infrared irradiation portion 52. The through- hole portions 61b and 62b are provided as substantially rectangular through-holes that penetrate the front and back sides at the upper center of the prism sheet 61 and the light diffusion sheet 62.
（変形例４）図１１、図１２は、本発明の変形例４を示している。この変形例４では上述した変形例２に対して、回路基板２０の前方側に実装されていた赤外線照射部５２を回路基板２０の背後側に実装した構成としている。すなわち、回路基板２０の前方側に位置する面を一方の面部Ｐ１とし、回路基板２０の背後側（一方の面部Ｐ１とは反対側）に位置する面を他方の面部Ｐ２としたとき、光源３０は回路基板２０の前方側に位置する一方の面部Ｐ１に実装され、赤外線照射部５２は回路基板２０の背後側に位置する他方の面部Ｐ２に実装されることになる。なお、この変形例４では、上述した実施形態にて採用したケース部材７０と、インストルメントパネル９０と、保護部材４０に設けた遮光部４１とを廃止した構成としている。 (Modification 4) FIGS. 11 and 12 show Modification 4 of the present invention. In the modified example 4, in contrast to the modified example 2 described above, the infrared irradiation unit 52 mounted on the front side of the circuit board 20 is mounted on the rear side of the circuit board 20. That is, when the surface located on the front side of the circuit board 20 is one surface portion P1 and the surface located on the back side of the circuit board 20 (the side opposite to the one surface portion P1) is the other surface portion P2, the light source 30 Is mounted on one surface portion P1 located on the front side of the circuit board 20, and the infrared irradiation unit 52 is mounted on the other surface portion P2 located on the back side of the circuit board 20. In the fourth modification, the case member 70, the instrument panel 90, and the light shielding portion 41 provided on the protection member 40 adopted in the above-described embodiment are omitted.
　そして、この変形例４において、表示パネル１０の前方側に位置する保護部材４０は、その外形形状が表示パネル１０の外形形状よりも一回り（若干）大きく、車両用計器Ｄを前方側から見たときに表示パネル１０の外側に位置する（はみ出る）周縁部４２を有している。この周縁部４２は、車両用計器Ｄを前方側から見たときに、表示パネル１０と重なり合わない非重合部として構成される。つまり、このことは保護部材４０には表示パネル１０と重なり合わない非重合部としての周縁部４２が設けられていることを意味する。 In the fourth modification, the protective member 40 located on the front side of the display panel 10 has an outer shape slightly larger (slightly) than the outer shape of the display panel 10, and the vehicle instrument D is viewed from the front side. It has a peripheral edge portion 42 located (extruded) outside the display panel 10 when the display panel 10 is opened. The peripheral portion 42 is configured as a non-overlapping portion that does not overlap the display panel 10 when the vehicle instrument D is viewed from the front side. That is, this means that the protective member 40 is provided with the peripheral edge portion 42 as a non-overlapping portion that does not overlap the display panel 10.
　また、この変形例４における赤外線照射部５２は、図１１中、車両用計器Ｄの上側中央に位置し、その赤外光の照射方向が筐体８０の周壁部８２側となるように他方の面部Ｐ２の端部に実装される。つまり、赤外線照射部５２は、その赤外光の照射方向が横方向（他方の面部Ｐ２に沿う方向）となるように回路基板２０の背後側を向く他方の面部Ｐ２の端部に実装される。ここで、変形例４の場合、一方の面部Ｐ１には撮像手段５１及び赤外線照射部５２が未実装状態となることから、欠落部６１ａ、６２ａ（もしくは貫通孔部６１ｂ、６２ｂ）を廃止することができ、表示面１１の全てのエリアに対応する一方の面部Ｐ１箇所に複数個の光源３０を実装することができ、表示面１１の全エリアを視覚情報エリアとして使用することができる（表示面１１の有効表示エリアを最大限に確保することができる）という利点がある。 In addition, the infrared irradiation unit 52 in the fourth modification is located at the center of the upper side of the vehicle instrument D in FIG. 11, and the other infrared irradiation unit 52 is arranged so that the infrared light irradiation direction is toward the peripheral wall portion 82 side of the housing 80. It is mounted on the end of the surface portion P2. That is, the infrared irradiation unit 52 is mounted on the end portion of the other surface portion P2 facing the back side of the circuit board 20 so that the irradiation direction of the infrared light is the horizontal direction (direction along the other surface portion P2). .. Here, in the case of the modified example 4, since the image pickup means 51 and the infrared irradiation unit 52 are not mounted on the one surface portion P1, the missing portions 61a and 62a (or the through hole portions 61b and 62b) should be eliminated. It is possible to mount a plurality of light sources 30 on one surface portion P1 corresponding to all the areas of the display surface 11, and the entire area of the display surface 11 can be used as a visual information area (display surface 11 effective display areas can be secured to the maximum).
　また、赤外線照射部５２から照射される赤外光は、光学部材としての導光部材１２０を利用して周縁部４２に導かれる構成となっている。換言すると、この変形例４では、赤外線照射部５２から照射される赤外光を周縁部４２に導くために車両用計器Ｄの上側中央に導光部材１２０が設けられた構成となっている。 In addition, the infrared light emitted from the infrared irradiation unit 52 is configured to be guided to the peripheral edge 42 by using the light guide member 120 as an optical member. In other words, in the fourth modification, the light guide member 120 is provided at the upper center of the vehicle instrument D in order to guide the infrared light emitted from the infrared irradiation unit 52 to the peripheral portion 42.
　導光部材１２０は、例えば透光性の合成樹脂材料によって形成された略柱状の導光体であり、例えば適宜固定手段を用いて周壁部８２に固定される。導光部材１２０は、赤外線照射部５２から照射される赤外光を受光する受光部１２１と、受光部１２１を通じて導光部材１２０の内部に採り入れた赤外光を前方側（周縁部４２側）に向けて反射するための反射部１２２と、この反射部１２２によって反射した赤外光を周縁部４２に向けて出射するための出射部１２３とを有している。受光部１２１は、赤外線照射部５２の発光面と対向するように導光部材１２０の背後側に設けられる。反射部１２２は、受光部１２１と対峙するように図１２中、受光部１２１の右側に位置する傾斜形状の反射面として構成される。出射部１２３は、周縁部４２と対峙するように導光部材１２０の前方側に設けられ、反射部１２２によって反射した赤外光が出射する出射面として構成される。 The light guide member 120 is a substantially columnar light guide body formed of, for example, a translucent synthetic resin material, and is fixed to the peripheral wall portion 82 using, for example, an appropriate fixing means. The light guide member 120 receives the infrared light emitted from the infrared irradiator 52 and the infrared light introduced into the light guide member 120 through the light receiver 121 to the front side (peripheral edge 42 side). It has a reflecting portion 122 for reflecting toward the edge portion and an emitting portion 123 for emitting the infrared light reflected by the reflecting portion 122 toward the peripheral edge portion 42. The light receiving section 121 is provided on the back side of the light guide member 120 so as to face the light emitting surface of the infrared irradiation section 52. The reflecting portion 122 is configured as an inclined reflecting surface located on the right side of the light receiving portion 121 in FIG. 12 so as to face the light receiving portion 121. The emitting portion 123 is provided on the front side of the light guide member 120 so as to face the peripheral portion 42, and is configured as an emitting surface from which the infrared light reflected by the reflecting portion 122 is emitted.
　このような構成によれば、赤外線照射部５２から横方向（図１２で見ると右方向）に照射される赤外光は、受光部１２１を通じて導光部材１２０の内部に採り入れられ、その後、反射部１０２で反射した赤外光が前方側（図１２で見ると縦方向）に向けて反射導光され、出射部１２３を経て出射部１２３の真上に位置する周縁部４２へと至る。その結果、周縁部４２に至った赤外光は保護部材４０を通じて前方側に向けて照射され、視認者Ｅの顔に到達する。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）に反射してインストルメントパネル９０の上部９３に設置された撮像手段５１に入射可能な構成となっている。 According to such a configuration, the infrared light emitted laterally (rightward in FIG. 12) from the infrared irradiation unit 52 is introduced into the light guide member 120 through the light receiving unit 121, and then reflected. The infrared light reflected by the portion 102 is reflected and guided toward the front side (vertical direction when viewed in FIG. 12) and reaches the peripheral portion 42 located right above the emitting portion 123 via the emitting portion 123. As a result, the infrared light reaching the peripheral portion 42 is emitted toward the front side through the protective member 40 and reaches the face of the viewer E. Further, the infrared light after irradiating the viewer E (face of the viewer E) can be reflected in the opposite direction (back side) and incident on the image pickup means 51 installed on the upper portion 93 of the instrument panel 90. Has become.
　これにより他方の面部Ｐ２に実装された赤外線照射部５２と導光部材１２０とを用いた場合であっても、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可能となる。赤外線照射部５２の個数は複数でもよく、例えば図１１中、車両用計器Ｄの上側中央と下側中央に赤外線照射部５２を設けてもよい。この際、導光部材１２０は個々の赤外線照射部５２の設置位置に対応させて複数個設ければよい。なお、この変形例４では撮像手段５１がインストルメントパネル９０の上部９３に設置された例を説明したが、撮像手段５１を前記実施形態と同様にして回路基板２０の前方側に実装してもよい。 As a result, even when the infrared irradiation unit 52 and the light guide member 120 mounted on the other surface P2 are used, the state of the viewer E can be detected based on the image captured by the imaging unit 51. Become. The number of the infrared irradiation units 52 may be plural, and for example, the infrared irradiation units 52 may be provided at the upper center and the lower center of the vehicle instrument D in FIG. At this time, a plurality of light guide members 120 may be provided so as to correspond to the installation positions of the individual infrared irradiation units 52. In the modification 4, the image pickup means 51 is installed on the upper portion 93 of the instrument panel 90, but the image pickup means 51 may be mounted on the front side of the circuit board 20 in the same manner as in the above embodiment. Good.
（変形例５）図１３、図１４は、本発明の変形例５を示している。この変形例５では前記変形例４の構成を基本構成として、当該基本構成に対してユニット化（モジュール化）された表示ユニット１３０を表示媒体として適用した例を示している。表示ユニット１３０は、図１３に示すように前記実施形態にて採用した表示パネル１０と、導光体１３１ａや前記実施形態にて採用した光源３０、フレキシブル配線板１３１ｂ等から構成され、表示パネル１０に照明光を導くための照明手段１３１と、導光体１３１ａを保持する略平板状の白色樹脂からなる樹脂ケース１３２と、表示パネル１０と表示パネル１０側となる一方の面部Ｔ１に光源３０が実装されたフレキシブル配線板１３１ｂとを少なくとも収容する金属製のフレーム部材１３３とを備えている。なお、フレキシブル配線板１３１ｂは後述する特許請求の範囲の請求項６に記載された回路基板に相当する。 (Modification 5) FIGS. 13 and 14 show Modification 5 of the invention. In this modified example 5, the configuration of the modified example 4 is used as a basic configuration, and a display unit 130 unitized (modularized) with respect to the basic configuration is applied as a display medium. As shown in FIG. 13, the display unit 130 includes the display panel 10 used in the embodiment, the light guide 131a, the light source 30 used in the embodiment, the flexible wiring board 131b, and the like. The illuminating means 131 for guiding the illuminating light, the resin case 132 made of a substantially flat plate-shaped white resin for holding the light guide 131a, and the light source 30 on the display panel 10 and one surface portion T1 on the display panel 10 side. A metal frame member 133 that houses at least the mounted flexible wiring board 131b is provided. The flexible wiring board 131b corresponds to the circuit board described in claim 6 of the claims described later.
　導光体１３１ａは、略平板状の透光性合成樹脂からなり、表示パネル１０の背面に沿うように配置される。換言すれば、導光体１３１ａは、光源３０から表示パネル１０へと至る照明光路中に配置されることになる。光源３０は、図１４中、導光体１３１ａの右側に位置する一側面Ｙに沿うように列状に複数個配置され、表示パネル１０に照明光を供給する可視光源である。フレキシブル配線板１３１ｂは、導光体１３１ａの一側面Ｙと対峙するように設けられ、その一方の面部Ｔ１とは反対側となる他方の面部Ｔ２には赤外線照射部５２が実装される。従って、この場合、前記実施形態にて採用した回路基板２０には光源３０が実装されておらず、また前記実施形態にて採用したプリズムシート６１や光拡散シート６２に代えて導光体１３１ａや樹脂ケース１３２が用いられた構成としている。 The light guide 131 a is made of a substantially flat plate-shaped translucent synthetic resin, and is arranged along the back surface of the display panel 10. In other words, the light guide 131a is arranged in the illumination optical path from the light source 30 to the display panel 10. The plurality of light sources 30 are visible light sources that are arranged in a line along one side surface Y located on the right side of the light guide 131a in FIG. The flexible wiring board 131b is provided so as to face the one side surface Y of the light guide 131a, and the infrared irradiation section 52 is mounted on the other surface portion T2 opposite to the one surface portion T1. Therefore, in this case, the light source 30 is not mounted on the circuit board 20 adopted in the above-described embodiment, and instead of the prism sheet 61 and the light diffusion sheet 62 adopted in the above-described embodiment, the light guide 131a, The resin case 132 is used.
　金属製のフレーム部材１３３は、略枠状にプレス成形され、その内部に表示パネル１０や導光体１３１ａ、光源３０、樹脂ケース１３２等を収容している。フレーム部材１３３の表示面１１に対応する部位には略矩形状の開口窓からなる開口部１３３ａが設けられている。また、フレーム部材１３３の側壁部分には赤外線照射部５２の配設位置と干渉しないような貫通孔形状からなる貫通部１３３ｂが設けられている。つまり、このことは、赤外線照射部５２はフレーム部材１３３に設けられた貫通部１３３ｂに対応するようにフレキシブル配線板１３１ｂの他方の面部Ｔ２に実装されていることを意味する。 The metal frame member 133 is press-molded into a substantially frame shape, and houses the display panel 10, the light guide 131a, the light source 30, the resin case 132, and the like inside. An opening 133a formed of a substantially rectangular opening window is provided at a portion of the frame member 133 corresponding to the display surface 11. Further, the side wall portion of the frame member 133 is provided with a penetrating portion 133b having a penetrating hole shape that does not interfere with the arrangement position of the infrared irradiating portion 52. That is, this means that the infrared irradiation unit 52 is mounted on the other surface portion T2 of the flexible wiring board 131b so as to correspond to the penetrating portion 133b provided on the frame member 133.
　また、この変形例５においても、上述した変形例４にて開示した技術を採用して、赤外線照射部５２から照射される赤外光が、フレーム部材１３３（前記側壁部分）と周壁部８２との間に配置された導光部材１２０を利用して周縁部４２に導かれる構成としている。 Also in this modification 5, the technique disclosed in the modification 4 described above is adopted, and the infrared light emitted from the infrared irradiation unit 52 is transmitted to the frame member 133 (the side wall portion) and the peripheral wall portion 82. It is configured to be guided to the peripheral edge portion 42 by utilizing the light guide member 120 arranged between the two.
　つまり、赤外線照射部５２から横方向（図１４で見ると右方向）に照射される赤外光は、受光部１２１、反射部１２２、出射部１２３、周縁部４２（保護部材４０）を順次経て前方側に向けて照射され、視認者Ｅの顔に到達する。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）に反射してインストルメントパネル９０の上部９３に設置された撮像手段５１に入射可能な構成となっている。これにより他方の面部Ｔ２に実装された赤外線照射部５２と導光部材１２０とを用いた場合であっても、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可能となる。赤外線照射部５２の個数は複数でもよく、例えば車両用計器Ｄの左上角部近傍と右上角部近傍に赤外線照射部５２設けてもよい。この際、導光部材１２０は個々の赤外線照射部５２の設置位置に対応させて複数個設ければよい。なお、変形例５の構成を採用した場合、回路基板２０を筐体８０の形状に対応させて自由に配置することが可能となる。 That is, the infrared light emitted laterally (rightward when viewed in FIG. 14) from the infrared irradiating section 52 sequentially passes through the light receiving section 121, the reflecting section 122, the emitting section 123, and the peripheral section 42 (protective member 40). It is irradiated toward the front side and reaches the face of the viewer E. Further, the infrared light after irradiating the viewer E (face of the viewer E) can be reflected in the opposite direction (back side) and incident on the image pickup means 51 installed on the upper portion 93 of the instrument panel 90. Has become. Accordingly, even when the infrared irradiation unit 52 and the light guide member 120 mounted on the other surface T2 are used, the state of the viewer E can be detected based on the image captured by the imaging unit 51. Become. The number of the infrared irradiation units 52 may be plural, and for example, the infrared irradiation units 52 may be provided near the upper left corner and near the upper right corner of the vehicle instrument D. At this time, a plurality of light guide members 120 may be provided so as to correspond to the installation positions of the individual infrared irradiation units 52. When the configuration of the modified example 5 is adopted, the circuit board 20 can be freely arranged corresponding to the shape of the housing 80.
（変形例６）図１５は、本発明の変形例６を示している。この変形例６では前記変形例４の構成を基本構成として、当該基本構成に対し、光学部材として導光部材１２０に代えて赤外光を反射する機能を有する反射板１４０を採用した例を示している。反射板１４０は、上記変形例４に開示した導光部材１２０の反射部１２２が形成されたいた位置に傾斜配置され、適宜固定手段を用いて周壁部８２に固定される。  (Modification 6) FIG. 15 shows a modification 6 of the invention. In this modified example 6, the structure of the modified example 4 is used as a basic structure, and in addition to the basic structure, a reflection plate 140 having a function of reflecting infrared light is used as an optical member instead of the light guide member 120. ing. The reflection plate 140 is inclinedly arranged at the position where the reflection portion 122 of the light guide member 120 disclosed in Modification 4 is formed, and is fixed to the peripheral wall portion 82 by using a fixing means as appropriate. 
　赤外線照射部５２から照射される赤外光は、図１５中、矢印で示すように赤外線照射部５２の右方に位置する反射板１４０を利用して周縁部４２に導かれる構成となっている。そして、周縁部４２に至った赤外光は保護部材４０を通じて前方側に向けて照射され、視認者Ｅの顔に到達する。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に反射してインストルメントパネル９０の上部９３に設置された撮像手段５１に入射可能な構成となっている。これにより他方の面部Ｐ２に実装された赤外線照射部５２と反射板１４０とを用いた場合であっても、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可能となる。なお、変形例５の構成と変形例６の構成を組み合わせて、図１４中、導光部材１２０の反射部１２２が形成されたいた位置に反射板１２０を傾斜配置してもよい。  Infrared light emitted from the infrared irradiation unit 52 is configured to be guided to the peripheral edge portion 42 by using a reflection plate 140 located on the right side of the infrared irradiation unit 52 as shown by an arrow in FIG. .. Then, the infrared light reaching the peripheral portion 42 is irradiated toward the front side through the protective member 40 and reaches the face of the viewer E. Further, the infrared light after irradiating the viewer E (face of the viewer E) is reflected in the opposite direction and can enter the image pickup means 51 installed on the upper portion 93 of the instrument panel 90. This makes it possible to detect the state of the viewer E based on the image captured by the image capturing unit 51 even when the infrared irradiation unit 52 and the reflector 140 mounted on the other surface P2 are used. .. It should be noted that the configuration of Modification 5 and the configuration of Modification 6 may be combined to arrange the reflection plate 120 at a position where the reflection portion 122 of the light guide member 120 was formed in FIG. 
　１０　　表示パネル（表示手段） 
　１１　　表示面 
　２０　　回路基板 
　２１　　制御部 
　３０　　光源 
　４０　　保護部材 
　４２　　周縁部（非重合部） 
　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　　ケース部材 
　７１　　本体部 
　７２　　第１の空洞部 
　７３　　第２の空洞部 
　７４　　障壁部 
　８０　　筐体 
　９０　　インストルメントパネル 
　９１　　開口壁 
　９２　　透光部 
１２０　　導光部材（光学部材） 
１３０　　表示ユニット 
１３１　　照明手段 
１３１ｂ　フレキシブル配線板（回路基板） 
１３３　　フレーム部材 
１３３ｂ　貫通部 
１４０　　反射板（光学部材） 
　　Ｅ　　視認者（運転者） 
　Ｐ１、Ｔ１　一方の面部 
　Ｐ２、Ｔ２　他方の面部  10 Display panel (display means)
11 Display surface
20 circuit board
21 Control unit
30 light sources
40 Protective material
42 Peripheral part (non-overlapping part)
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 Case member
71 Main body
72 First cavity
73 Second cavity
74 Barrier
80 housing
90 Instrument panel
91 Opening wall
92 Translucent part
120 Light guide member (optical member)
130 display unit
131 Lighting means
131b Flexible wiring board (circuit board)
133 frame member
133b penetration part
140 Reflector (optical member)
E Viewer (driver)
One side of P1 and T1
P2, T2 The other surface

Claims (6)

  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設けられる撮像手段と、
    赤外光を前記視認者に向けて照射する赤外線照射部と、 
    前記表示手段に可視光を供給するように前記表示手段の前記反視認者側に設けられる光源と、 
    前記撮像手段と前記光源とが配設される回路基板とを備え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 capturing unit that is capable of capturing an image of a state of a viewer who visually recognizes the display unit and that is provided on the side opposite to the viewer side of the display unit that is opposite to the viewer side.
    An infrared irradiation unit that irradiates the viewer with infrared light,
    A light source provided on the anti-viewer side of the display means so as to supply visible light to the display means,
    A display device for a vehicle, comprising: a circuit board on which the image pickup means and the light source are arranged.
  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設けられる赤外線照射部と、
    前記表示手段に可視光を供給するように前記表示手段の前記反視認者側に設けられる光源と、 
    前記赤外線照射部と前記光源とが配設される回路基板とを備え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 unit capable of picking up an image of a state of a viewer who visually recognizes the display unit;
    An infrared irradiator provided on the side of the viewer opposite to the viewer so as to irradiate infrared light toward the viewer,
    A light source provided on the anti-viewer side of the display means so as to supply visible light to the display means,
    A display device for a vehicle, comprising: a circuit board on which the infrared irradiation unit and the light source are arranged.
  3. 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設けられる撮像手段と、
    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設けられる赤外線照射部と、 
    前記表示手段に可視光を供給するように前記表示手段の前記反視認者側に設けられる光源と、 
    前記撮像手段と前記赤外線照射部と前記光源とが配設される回路基板とを備え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 capturing unit that is capable of capturing an image of a viewer who visually recognizes the display unit and that is provided on the side opposite to the viewer side of the display unit that is opposite to the viewer.
    An infrared irradiating section provided on the counter viewer side of the display means so as to irradiate infrared light toward the viewer,
    A light source provided on the anti-viewer side of the display means so as to supply visible light to the display means,
    A vehicle display device comprising: a circuit board on which the image pickup means, the infrared irradiation section, and the light source are arranged.
  4. 前記回路基板と前記表示手段との間にはケース部材が設けられ、 
    前記ケース部材は、前記撮像手段に対応する第１の空洞部と、前記赤外線照射部に対応する第２の空洞部と、前記第１の空洞部と前記第２の空洞部とを区画するための障壁部とを備えていることを特徴とする請求項３記載の車両用表示装置。     A case member is provided between the circuit board and the display means,
    The case member divides the first hollow portion corresponding to the image pickup unit, the second hollow portion corresponding to the infrared irradiation unit, the first hollow portion and the second hollow portion. 4. The vehicle display device according to claim 3, further comprising:
  5. 前記表示手段の前記視認者側に位置する保護部材には前記表示手段と重なり合わない非重合部が設けられ、 
    前記光源が前記回路基板の前記視認者側に位置する一方の面部に配設されるとともに前記赤外線照射部が前記回路基板の前記反視認者側に位置する他方の面部に配設され、
    前記赤外線照射部から照射される前記赤外光が光学部材を利用して前記非重合部に導かれる構成とした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 protective member located on the viewer side of the display unit is provided with a non-overlapping portion that does not overlap with the display unit,
    The light source is disposed on one surface portion of the circuit board located on the viewer side, and the infrared irradiation portion is disposed on the other surface portion of the circuit board located on the anti-viewer side,
    The vehicle display device according to claim 2 or 3, wherein the infrared light emitted from the infrared irradiation unit is guided to the non-overlapping part using an optical member.
  6. 前記表示手段の前記視認者側に位置する保護部材には前記表示手段と重なり合わない非重合部が設けられ、 
    前記表示手段と前記表示手段側となる一方の面部に前記光源が配設された前記回路基板とを少なくとも収容するフレーム部材を備え、
    前記赤外線照射部は、前記フレーム部材に設けられた貫通部に対応するように前記一方の面部とは反対側となる前記回路基板の他方の面部に配設され、
    前記赤外線照射部から照射される前記赤外光が光学部材を利用して前記非重合部に導かれる構成としたことを特徴とする請求項２記載の車両用表示装置。     The protective member located on the viewer side of the display unit is provided with a non-overlapping portion that does not overlap with the display unit,
    A frame member accommodating at least the display means and the circuit board on which the light source is disposed on one surface portion on the display means side;
    The infrared irradiator is disposed on the other surface of the circuit board opposite to the one surface so as to correspond to the penetrating portion provided on the frame member,
    The vehicle display device according to claim 2, wherein the infrared light emitted from the infrared irradiation section is guided to the non-overlapping section by using an optical member.
PCT/JP2020/006186 2019-02-21 2020-02-18 Vehicle display device WO2020171044A1 (en)

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