WO2021241498A1 - Dispositif d'affichage de véhicule - Google Patents

Dispositif d'affichage de véhicule Download PDF

Info

Publication number
WO2021241498A1
WO2021241498A1 PCT/JP2021/019601 JP2021019601W WO2021241498A1 WO 2021241498 A1 WO2021241498 A1 WO 2021241498A1 JP 2021019601 W JP2021019601 W JP 2021019601W WO 2021241498 A1 WO2021241498 A1 WO 2021241498A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarizing plate
grid polarizing
wire grid
infrared light
vehicle
Prior art date
Application number
PCT/JP2021/019601
Other languages
English (en)
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 WO2021241498A1 publication Critical patent/WO2021241498A1/fr

Links

Images

Classifications

    • 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
    • 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
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/26—Windows; Cover glasses; Sealings therefor
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements

Definitions

  • the present invention relates to a vehicle display device mounted on a vehicle such as an automobile or a motorcycle.
  • Patent Document 1 As a vehicle display device mounted on a vehicle such as an automobile or a motorcycle, as described in Patent Document 1, a visual image (driver) who sits in the driver's seat of the vehicle and visually recognizes the liquid crystal display panel is imaged.
  • the infrared light emitted from the infrared irradiation unit irradiates the viewer's face, and the infrared light reflected on the viewer's face is used as an imaging means (in the near infrared region).
  • the viewer is imaged by incident on a camera having sensitivity). From the captured image of the viewer, for example, whether or not the viewer is drowsy by detecting the eyes of the viewer, whether or not the viewer is driving aside, etc. You can judge.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle display device capable of preventing a situation in which the image pickup of a viewer is obstructed by strong reflected light.
  • the vehicle display device has a display means for displaying information about a vehicle and infrared light irradiation for irradiating the display means toward a visible viewer.
  • a means and an image pickup means for imaging the viewer with the infrared light are provided, a first wire grid polarizing plate is provided on the side of the viewer of the image pickup means, and the infrared light irradiation means is visually recognized.
  • a second wire grid polarizing plate is provided on the side of the person, and the polarization direction of the first wire grid polarizing plate and the polarization direction of the second wire grid polarizing plate are orthogonal to each other.
  • the display means is a liquid crystal display panel, and a retardation plate is provided on the side of the display means and the viewer of the image pickup means, and the phase-advancing axis or the slow-phase axis of the retardation plate is the first wire grid. It may be parallel to the polarization direction of the polarizing plate.
  • a protective member made of a material that does not affect the polarization characteristics of the infrared light may be provided on the side of the display means, the infrared light irradiation means, and the viewer of the image pickup means.
  • the protective member is preferably made of inorganic glass or cast material.
  • the vehicle display device According to the vehicle display device according to the present invention, it is possible to prevent a situation in which the image pickup of the viewer is obstructed by strong reflected light.
  • FIG. 3 is a cross-sectional view taken along the line AA of the vehicle instrument of FIG. It is explanatory drawing which shows the arrangement relation of the retardation film of the vehicle instrument of FIG. 1 and a wire grid polarizing plate. It is explanatory drawing which shows the path of the infrared light at the time of image pickup by the vehicle instrument of FIG.
  • the vehicle instrument 1 includes a case 2, a display panel 3 housed in the case 2, a backlight 4 and a camera 5 provided on the back side of the display panel 3, and left and right sides of the case 2.
  • Two LEDs are provided in each, a cover glass 7 that covers the case 2 from the front side, a retardation film 8 as a retardation plate provided on the front side of the display panel 3, and a retardation film 8 provided on the front side of the camera 5.
  • the wire grid polarizing plate 9 as the first polarizing plate and the wire grid polarizing plate 10 as the second polarizing plate provided on the front side of each LED 6 are provided.
  • Case 2 is a box-shaped, resin-made instrument housing with an open front side, and has a bottom wall portion 2a and a peripheral wall portion 2b.
  • the display panel 3 is a TFT (thin film transistor) type liquid crystal display panel, and displays various information about the vehicle such as vehicle speed, shift indicator, mileage, remaining fuel (remaining charge amount), outside air temperature, and direction of travel by navigation. indicate.
  • the display panel 3 is provided with an infrared light transmitting portion 3a in which an image is not displayed and visible light is reflected or absorbed to transmit infrared light.
  • the backlight 4 has, for example, a diffusion sheet, a prism sheet, a visible light source capable of supplying visible light to these sheets, and the like, and illuminates the display panel 3 substantially uniformly from the back side.
  • the backlight 4 is provided with a hole 4a, and the camera 5 is arranged at the position of the hole 4a.
  • the camera 5 is provided on the bottom wall portion 2a of the case 2, is located on the back surface side of the infrared light transmitting portion 3a of the display panel 3 so as to face the infrared light transmitting portion 3a, and is irradiated from the LED 6 described later.
  • An image pickup device having sensitivity to infrared light in a certain wavelength band and a lens capable of transmitting infrared light to form an image on the image pickup device are provided, and a near-infrared image of driver D (see FIG. 4) is captured.
  • a total of four LEDs 6 are provided on the peripheral wall portion 2b of the case 2 and are infrared light irradiation means for irradiating the driver D with infrared light (near infrared rays).
  • the cover glass 7 is attached to the front side of the peripheral wall portion 2b of the case 2, covers the display panel 3, the camera 5, the LED 6, the wire grid polarizing plate 9 and the wire grid polarizing plate 10, and protects them from dust and the like.
  • the cover glass 7 is made of a material that does not affect the polarization characteristics of the infrared light emitted by the LED 6, for example, inorganic glass or a cast material of a resin such as acrylic or polycarbonate, and is a transmissive portion that transmits visible light and infrared light.
  • a black non-transmissive portion 7b that is provided around the transmissive portion 7a and abuts on the peripheral wall portion 2b and does not transmit light, and an infrared light transmission that transmits infrared light at the front side portion of the four LEDs 6. It has a portion 7c.
  • the retardation film 8 is made of a retardation film (SRF film), and is provided between the retardation film (SRF film) and the display panel 3 on the back surface side of the transmission portion 7a of the cover glass 7.
  • the retardation film 8 slows the film passing speed of either the P wave or the S wave to change the linearly polarized light to circularly polarized light, thereby eliminating rainbow unevenness in the liquid crystal display and improving the brightness, and also by the driver. It solves the problem that the liquid crystal display disappears when D wears polarized sunglasses.
  • the wire grid polarizing plate 9 is provided between the camera 5 and the display panel 3, and the wire grid polarizing plate 10 is provided between the LED 6 and the cover glass 7. Both the wire grid polarizing plate 9 and the wire grid polarizing plate 10 transmit only polarized light vibrating in a specific direction, and the polarization direction of the wire grid polarizing plate 9 (the vibration direction of the polarized light transmitted by the wire grid polarizing plate). And the polarization direction of the wire grid polarizing plate 10 are arranged so as to be orthogonal to each other.
  • phase advance axis or the slow phase axis of the retardation film 8 is parallel to the polarization direction of the wire grid polarizing plate 9 and / or the polarization direction of the wire grid polarizing plate 10, and as shown in FIG. 3, the retardation film
  • the phase-advancing axis of 8 is the width direction of the vehicle (horizontal direction in FIG. 3) and the slow-phase axis is the height direction of the vehicle (vertical direction in FIG. 3)
  • the polarization direction of the wire grid polarizing plate 9 is the vehicle.
  • the wire grid polarizing plate 10 When installed so as to be in the width direction of, the wire grid polarizing plate 10 becomes parallel to the phase advance axis of the retardation film 8, and the wire grid polarizing plate 10 is installed so that the polarization direction is in the height direction of the vehicle. It becomes parallel to the slow axis of the phase difference film 8.
  • the backlight 4 is turned on to display various information on the display panel 3, and the LED 6 is turned on to irradiate infrared light.
  • the LED 6 is turned on to irradiate infrared light.
  • FIG. 4 only the P wave of the infrared light from the LED 6 passes through the wire grid polarizing plate 10 and is emitted from the infrared light transmitting portion 7c of the cover glass 7 to the outside of the vehicle instrument 1 for operation. Reach the face of person D.
  • the strongly reflected light (normally reflected light) by the glasses G returns to the vehicle instrument 1 as a P wave, and the transmission portion 7a of the cover glass 7, the retardation film 8 and the display panel. It passes through the infrared light transmitting portion 3a of 3 and heads toward the camera 5 (because the polarization direction of the P wave transmitted through the wire grid polarizing plate 10 is parallel to the phase-advancing axis or the slow-phase axis of the retardation film 8). , Passing through the retardation film 8 with linearly polarized light.) Since the wire grid polarizing plate 9 transmits only the S wave and cuts the P wave, strong reflected light is not incident on the camera 5.
  • the reflected light diffusely reflected by the driver D's eyes and other facial parts instead of the glasses G is divided into P waves and S waves and returned to the vehicle instrument 1, so that the S waves press the wire grid polarizing plate 9.
  • the face of the driver D is imaged by the camera 5 through transmission.
  • the captured image of the driver D is input to the control unit (not shown), and the state of the driver D is detected from the movement of the face and the like.
  • the control unit detects where the driver D is looking from the position of the eyes of the driver D, that is, the viewpoint position of the driver D, and the display panel 3 is adjusted to the viewpoint position.
  • the display can be controlled, and if the driver D is drowsy or inattentive driving, a warning can be issued by sound, display, vibration, or the like.
  • the vehicle instrument 1 is operated by a display panel 3 for displaying information about the vehicle, an LED 6 for irradiating the display panel 3 with infrared light toward a visible driver D, and infrared light.
  • a camera 5 for photographing the person D is provided, a wire grid polarizing plate 10 is provided on the side of the driver D of the LED 6, and a wire grid polarizing plate 9 is provided on the side of the driver D of the camera 5, and the wire grid polarizing plate is provided.
  • the polarization direction of the plate 9 and the polarization direction of the wire grid polarizing plate 10 are orthogonal to each other, the infrared light emitted from the LED 6 is linearly polarized by the wire grid polarizing plate 10 on the front side of the LED 6, and the driver D's Even if the wire grid polarizing plate 9 on the front side of the camera 5 is positively reflected by the glasses G or the like and returned as strongly reflected light, the polarization direction of the wire grid polarizing plate 9 is orthogonal to the polarization direction of the wire grid polarizing plate 10, and the strongly reflected light thereof. To cut.
  • a part of the reflected light diffusely reflected by the driver D passes through the wire grid polarizing plate 9 and is incident on the camera 5, so that the situation where the image pickup of the driver D is hindered by the strong reflected light is prevented. be able to.
  • the polarization direction of the wire grid polarizing plate 9 (and the polarization direction of the wire grid polarizing plate 10 orthogonal to the polarization direction) forms an angle that diagonally intersects the phase-advancing axis or the slow-phase axis of the retardation film 8.
  • the infrared light polarized by the wire grid polarizing plate 9 passes through the retardation film 8, it returns to circularly polarized light, irradiates the driver D with the P wave, and the S wave cannot enter the camera 5.
  • the phase-advancing axis or the slow-phase axis of the retardation film 8 is parallel to the polarization direction of the wire grid polarizing plate 9, the performance of the wire grid polarizing plate and the retardation film is not impaired. , Both can be mounted on the vehicle instrument 1 at the same time.
  • the cover glass 7 is made of an inorganic glass or a cast material that does not affect the polarization characteristics of infrared light, it is possible to install the cover glass without impairing the performance of the wire grid polarizing plate. It will be possible.
  • the retardation film 8 is not provided on the front side of the LED 6, and the camera 5 is provided on the back side of the display panel 3, but the retardation film 8 is provided on the front side of the LED 6.
  • the camera 5 may not be provided on the back side of the display panel 3, and the arrangement of each component of the vehicle display device is such that the arrangement of the wire grid polarizing plate is suitable for the gist of the present invention. It doesn't matter what it is.
  • the phase-advancing axis of the retardation film 8 is in the width direction of the vehicle, and the slow-phase axis of the retardation film 8 is in the height direction of the vehicle.
  • the axis may be the width direction of the vehicle, and the phase advance axis may be the height direction of the vehicle.
  • Vehicle instrument vehicle display device
  • Display panel display means, liquid crystal display panel
  • Camera imaging means
  • Infrared light irradiation means LED
  • Cover glass protecting member
  • Phase difference film phase difference plate
  • Wire grid polarizing plate first wire grid polarizing plate
  • Wire grid polarizing plate second wire grid polarizing plate
  • D Driver visual person

Abstract

L'invention concerne un dispositif d'affichage de véhicule avec lequel il est possible d'empêcher des situations dans lesquelles une image du spectateur est entravée par une lumière réfléchie intense. Une jauge de véhicule (1) comprend un panneau d'affichage (3) qui affiche des informations concernant le véhicule, des diodes électroluminescentes (6) qui projettent de la lumière infrarouge vers un conducteur (D) pour lequel le panneau d'affichage (3) est visible, et une caméra (5) qui capture une image du conducteur (D) à l'aide d'une lumière infrarouge, une plaque de polarisation de grille métallique (9) étant disposée sur le côté conducteur (D) de la caméra (5), des plaques de polarisation de grille métallique (10) étant disposées sur les côtés conducteur (D) des DEL (6) et la direction de polarisation de la plaque de polarisation de grille métallique (9) et la direction de polarisation des plaques de polarisation de grille métallique (10) étant orthogonales.
PCT/JP2021/019601 2020-05-27 2021-05-24 Dispositif d'affichage de véhicule WO2021241498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020092165 2020-05-27
JP2020-092165 2020-05-27

Publications (1)

Publication Number Publication Date
WO2021241498A1 true WO2021241498A1 (fr) 2021-12-02

Family

ID=78744401

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/019601 WO2021241498A1 (fr) 2020-05-27 2021-05-24 Dispositif d'affichage de véhicule

Country Status (1)

Country Link
WO (1) WO2021241498A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011257610A (ja) * 2010-06-09 2011-12-22 Hayashi Technical Kenkyusho:Kk 車載用表示装置
EP3193318A1 (fr) * 2016-01-18 2017-07-19 Autoliv Development AB Système de surveillance de conducteur et procédé de surveillance de conducteur pour un véhicule automobile
WO2017175627A1 (fr) * 2016-04-05 2017-10-12 林テレンプ株式会社 Dispositif d'affichage et élément optique
JP2018072219A (ja) * 2016-10-31 2018-05-10 株式会社ファルテック 車両用夜間監視装置及び車両用外装部品
JP2019020991A (ja) * 2017-07-14 2019-02-07 シャープ株式会社 撮像装置、認証装置、および撮像方法
JP2020032825A (ja) * 2018-08-29 2020-03-05 日本精機株式会社 車両用表示装置
JP2020036144A (ja) * 2018-08-29 2020-03-05 日本精機株式会社 乗員監視装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011257610A (ja) * 2010-06-09 2011-12-22 Hayashi Technical Kenkyusho:Kk 車載用表示装置
EP3193318A1 (fr) * 2016-01-18 2017-07-19 Autoliv Development AB Système de surveillance de conducteur et procédé de surveillance de conducteur pour un véhicule automobile
WO2017175627A1 (fr) * 2016-04-05 2017-10-12 林テレンプ株式会社 Dispositif d'affichage et élément optique
JP2018072219A (ja) * 2016-10-31 2018-05-10 株式会社ファルテック 車両用夜間監視装置及び車両用外装部品
JP2019020991A (ja) * 2017-07-14 2019-02-07 シャープ株式会社 撮像装置、認証装置、および撮像方法
JP2020032825A (ja) * 2018-08-29 2020-03-05 日本精機株式会社 車両用表示装置
JP2020036144A (ja) * 2018-08-29 2020-03-05 日本精機株式会社 乗員監視装置

Similar Documents

Publication Publication Date Title
JP5919724B2 (ja) 車両用ヘッドアップディスプレイ装置
JP6131766B2 (ja) 車両用ヘッドアップディスプレイ装置
JP4895324B2 (ja) ヘッドアップディスプレイ装置
US10036890B2 (en) Head-up display device
JP6825903B2 (ja) ドライバー撮像装置
US20160320624A1 (en) Head-up display device
US5291184A (en) Head up display for a vehicle having a liquid crystal indicator and a reflecting prism
JP7008267B2 (ja) ヘッドアップディスプレイ装置
JP2015222337A (ja) 表示装置
JP2011213184A (ja) シースルー表示装置
CN111301166A (zh) 投影设备
JP2010139938A (ja) タッチパネル及びタッチパネル付き液晶表示装置
WO2021241498A1 (fr) Dispositif d'affichage de véhicule
JP2009056932A (ja) 車両用後写鏡
JP2019152795A (ja) ヘッドアップディスプレイ装置
JP6354771B2 (ja) 表示装置
WO2020158602A1 (fr) Dispositif d'affichage de véhicule
JPH0299427A (ja) ヘツドアツプデイスプレイ装置
JPH11194702A (ja) 表示装置および表示装置におけるホログラム再生方法
KR101440682B1 (ko) 헤드업 디스플레이
JP2020032999A (ja) 車両用表示装置
JPH02282784A (ja) スクリーン
JP2017181555A (ja) 表示装置
JPWO2019102775A1 (ja) ヘッドアップディスプレイ装置
JP2020032825A (ja) 車両用表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21813977

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21813977

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP