WO2018207630A1 - ヘッドアップディスプレイ装置 - Google Patents

ヘッドアップディスプレイ装置 Download PDF

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Publication number
WO2018207630A1
WO2018207630A1 PCT/JP2018/016896 JP2018016896W WO2018207630A1 WO 2018207630 A1 WO2018207630 A1 WO 2018207630A1 JP 2018016896 W JP2018016896 W JP 2018016896W WO 2018207630 A1 WO2018207630 A1 WO 2018207630A1
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WO
WIPO (PCT)
Prior art keywords
display panel
mirror
reflected
hud device
light
Prior art date
Application number
PCT/JP2018/016896
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English (en)
French (fr)
Japanese (ja)
Inventor
弘侑 小林
Original Assignee
パナソニックＩｐマネジメント株式会社
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.)
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Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2018207630A1 publication Critical patent/WO2018207630A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays

Definitions

  • the present disclosure relates to a head-up display device (HUD device).
  • HUD device head-up display device
  • a display device for displaying an image for example, a head-up display device (HUD device) for a vehicle is known (for example, see Patent Document 1).
  • HUD device head-up display device
  • This HUD device reflects light representing an image by a windshield (display medium) of the vehicle, thereby displaying the image as a virtual image in a space in front of the windshield.
  • the driver can superimpose an image showing information related to driving (such as car navigation information) on the scenery in front of the windshield.
  • the external light When external light (for example, sunlight) is irradiated on the HUD device, the external light may be incident on the optical system inside the HUD device. In this case, external light is reflected by the optical system and can be emitted to the outside of the HUD device again. If the light emitted to the outside is incident on the eyes of the driver, there is a risk of hindering driving.
  • external light for example, sunlight
  • the present disclosure provides a HUD device that suppresses emission of light that hinders operation even when external light is incident while preventing an increase in size.
  • the head-up display device includes a display panel, a mirror, and a low reflection member.
  • the display panel projects an image, and the mirror reflects the image projected from the display panel.
  • the low reflection member is provided between the display panel and the mirror.
  • the reflectance of the low reflection member is lower than the reflectance of the display panel.
  • the display panel is arranged in a posture in which the main optical path projected from the display panel, reflected by the mirror, and directed to the outside is not parallel to the normal line of the display panel.
  • the mirror is disposed on the optical path of the light incident from the outside along the main optical path and reflected by the display panel.
  • This disclosure can suppress the emission of light that hinders operation even when external light is incident while preventing the HUD device from becoming large.
  • FIG. 1 is a schematic diagram of a vehicle illustrating a usage example of a HUD device according to an embodiment of the present disclosure.
  • FIG. 2 is an explanatory diagram illustrating a region of an image displayed by the HUD device according to the embodiment of the present disclosure.
  • FIG. 3 is a schematic diagram illustrating an internal optical system of the HUD device according to the related technique 1, light incident on the HUD device, and light rays emitted from the HUD device.
  • FIG. 4 is an explanatory diagram showing an internal optical system of the HUD device according to Related Technology 2.
  • FIG. 5 is an explanatory diagram showing an internal optical system of the HUD device according to Related Technology 3.
  • FIG. 6 is an explanatory diagram showing an internal optical system of the HUD device according to the embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram showing a usage example of the HUD device 2 shown in FIG.
  • FIG. 2 is an explanatory diagram showing the display area 11 of the image 8 displayed by the HUD device 2.
  • the HUD device 2 is disposed on a dashboard 6 of an automobile 4 (an example of a vehicle), for example.
  • a windshield 10 is disposed above the dashboard 6 of the automobile 4.
  • the windshield 10 is a so-called windshield, and is formed of glass having translucency.
  • the HUD device 2 projects light representing an image 8 that is a virtual image toward the display area 11 on the windshield 10 near the driver's seat, for example.
  • the light projected by the HUD device 2 is reflected toward the driver 12 by the display area 11 of the windshield 10.
  • the driver 12 visually recognizes the image 8 provided by the HUD device 2 with the light reflected by the display area 11.
  • the image 8 which is a virtual image is viewed in the display area 11 and viewed in the space 16 in front of the windshield 10 when viewed from the driver 12.
  • the driver 12 can see the image 8 that is a virtual image superimposed on the scenery in front of the windshield 10.
  • HUD device 2 according to the present embodiment problems solved by the HUD device 2 according to the present embodiment will be described with reference to a plurality of HUD devices according to the related art corresponding to the HUD device 2 according to the present embodiment. That is, the HUD device according to the related technology described below is a comparative example with respect to the HUD device 2 according to the present embodiment.
  • FIG. 3 is a schematic diagram illustrating an internal optical system of the HUD device 2A according to the related technique 1, a light beam incident on the HUD device 2A, and a light beam emitted from the HUD device 2A.
  • HUD device 2 ⁇ / b> A is arranged on dashboard 6 and projects light representing image 8, which is a virtual image, toward windshield 10, similarly to HUD device 2 according to the present embodiment.
  • the HUD device 2A includes a display panel 102A, a mirror 104A, and a mirror 106A.
  • a main optical path 20A shown in FIG. 3 illustrates an optical path in which light representing an image displayed by the HUD device 2A travels from the center of the display panel to the eyes of the driver 12 (more specifically, the pupil). , Is uniquely determined in the optical system of the HUD device 2A.
  • the light traveling in the same optical path as the main optical path 20A is illustrated as being slightly shifted from the main optical path 20A for convenience of explanation. The same applies to the subsequent drawings.
  • the display panel 102A is a display panel that projects an image.
  • the display panel 102A projects light representing the image 8 as a video.
  • the display panel 102A is, for example, a liquid crystal display panel.
  • the mirror 104A is a mirror that reflects the image projected from the display panel 102A.
  • the light representing the image reflected by the mirror 104A is reflected toward the mirror 106A.
  • FIG. 3 shows the case where the mirror 104A is a plane mirror, but it may be a curved mirror such as a concave mirror or a convex mirror.
  • the mirror 106A is a mirror that reflects an image projected from the display panel 102A and reflected by the mirror 104A.
  • the light representing the image reflected by the mirror 106A is emitted to the outside of the HUD device 2A, is reflected by the windshield 10, and enters the eyes of the driver 12.
  • FIG. 3 shows the case where the mirror 106A is a concave mirror, but it may be a curved mirror such as a convex mirror or a plane mirror.
  • the optical path of the incident sunlight S substantially coincides with the optical path of the light representing the video emitted from the HUD device 2A.
  • the sunlight S incident on the HUD device 2A is reflected by the mirrors 106A and 104A and reaches the display panel 102A. Since the surface of the display panel 102A has a reflectance greater than zero, the sunlight S is reflected.
  • the sunlight S reflected by the display panel 102A travels the same optical path as the main optical path 20A. That is, the sunlight S reflected by the display panel 102A is sequentially reflected by the mirrors 104A and 106A and the windshield 10 and enters the eyes of the driver 12.
  • the luminance of sunlight is 1.6 ⁇ 10 9 cd / m 2
  • the reflectance of the surface of the display panel 102A is about 3 to 4%. Therefore, the luminance of light incident on the eyes of the driver 12 is about 10 7 cd / m 2 .
  • the luminance of light emitted from a HUD device or a display device used for normal use is about 10 2 to 10 4 cd / m 2 , and when light with a luminance exceeding this is incident on the human eye , Humans see light more bright than usual.
  • the first problem can be said to be due to the fact that the optical path of the incident sunlight S substantially coincides with the optical path of the light representing the image emitted from the HUD device 2A.
  • the HUD device 2B is an example of a configuration that solves the first problem in the related art 1.
  • FIG. 4 is an explanatory diagram showing an internal optical system of the HUD device 2B according to Related Technology 2.
  • the HUD device 2B has a display panel 102B and mirrors 104B and 106B.
  • a main optical path 20B shown in FIG. 4 illustrates an optical path of light representing an image displayed by the HUD device 2B.
  • the mirrors 104B and 106B are the same as the mirrors 104A and 106A in the HUD device 2A according to the related technique 1, respectively.
  • the display panel 102B is configured such that the display panel 102A in the HUD device 2A according to the related technique 1 is arranged in a posture different from that of the display panel 102A. Specifically, the display panel 102B is arranged in a posture in which the normal line NB of the display panel 102B is not parallel to the main optical path 20B.
  • the first problem is avoided by arranging the display panel 102B in the above-described posture. That is, even if light incident in the opposite direction along the main optical path 20B from the outside of the HUD device 2B is reflected by the mirrors 106B and 104B and reaches the display panel 102B, the reflected light is different from the main optical path 20B. To proceed. Therefore, it is avoided that the reflected light is emitted to the outside of the HUD device 2B along the main optical path 20B.
  • the HUD device 2 ⁇ / b> C is an example of a configuration in which the display panel 102 ⁇ / b> B or the like in the related technology 2 is enlarged.
  • FIG. 5 is an explanatory diagram showing an internal optical system of the HUD device 2C according to Related Technology 3.
  • the HUD device 2C includes a display panel 102C and mirrors 104C and 106C.
  • a main optical path 20C shown in FIG. 5 illustrates an optical path of light representing an image displayed by the HUD device 2C.
  • the display panel 102C and the mirrors 104C and 106C are obtained by increasing the size of the display panel 102B and the mirrors 104B and 106B in the related technique 2 (see FIG. 4), respectively.
  • FIG. 6 is an explanatory diagram showing an internal optical system of the HUD device 2 according to the present embodiment.
  • the HUD device 2 includes a display panel 102, mirrors 104 and 106, and a low reflection member 108.
  • a main optical path 20 shown in FIG. 6 illustrates an optical path of light representing an image displayed by the HUD device 2.
  • the display panel 102 is a display panel that projects an image.
  • the display panel 102 projects light representing the image 8 as a video.
  • the display panel 102 is a relatively large display panel. That is, it is larger than the display panel 102A etc. of the related technologies 1 and 2, and has the same dimensions as the display panel 102C of the related technology 3. Further, the display panel 102 is arranged in a posture in which the normal line N of the display panel 102 is not parallel to the main optical path 20.
  • the low reflection member 108 is a member provided between the display panel 102 and the mirror 104 and having a lower reflectance than the display panel 102.
  • an anti-glare film also referred to as a non-gloss film
  • a reflectance of about 0.1% can be adopted.
  • the position where the low reflection member 108 is provided may be anywhere between the display panel 102 and the mirror 104.
  • the low reflection member 108 is provided on the display panel 102, for example.
  • the low reflection member 108 may be provided via another film or film such as a protective film of the display panel 102, or directly on the display surface of the display panel 102 without passing through another film or the like. May be provided. Further, the low reflection member 108 may be fixed on the display panel 102 by adhesion or adhesion.
  • the mirror 104 is a mirror that reflects the image projected from the display panel 102.
  • the light representing the image reflected by the mirror 104 is reflected toward the mirror 106.
  • the mirror 104 may be a curved mirror such as a concave mirror or a convex mirror, as in the related art 1 and the like.
  • the mirror 106 is a mirror that reflects an image projected from the display panel 102 and reflected by the mirror 104.
  • the mirror 106 may be a curved mirror such as a convex mirror, or may be a plane mirror, as in the related art 1 and the like.
  • the light incident along the main optical path 20 from the outside of the HUD device 2 is reflected by the display panel 102 only once. Traveling in the opposite direction along the optical path 20 is avoided.
  • this light is reflected twice by the low reflection member and the display panel. As a result, the luminance decreases. Therefore, light incident along the main optical path 20 from the outside of the HUD device 2 may be emitted to the outside of the HUD device 2, but the brightness of the emitted light is reduced to such an extent that does not hinder driving. Yes.
  • the display panel 102 and the mirror 104 are arranged in such a positional relationship that light incident from the outside of the HUD device 2 and reflected by the display panel 102 is reflected by the display panel 102 after being reflected by the mirror 104. ing.
  • the display panel 102 and the mirror 104 are arranged in a positional relationship in which the light reflected by the display panel 102 travels in the opposite direction along the main optical path 20 after being reflected by the mirror 104.
  • the light beam is incident on the display panel 102 between the time when it enters from the outside of the HUD device 2 and the time when it exits the HUD device 2 again. Reflected twice.
  • the luminance of the light after the two reflections is a luminance obtained by multiplying the incident light by the reflectance of the low reflection member 108 twice.
  • the brightness of the light is reduced to such an extent that it does not hinder driving when it enters the eyes of the driver 12 after being emitted to the outside of the HUD device 2 and reflected by the windshield 10.
  • the luminance of outgoing light emitted to the outside of the HUD device 2 is 1.6 ⁇ 10 3 cd / m 2 and then reflected by the windshield 10 to about 10 2 cd / m 2 .
  • This level of brightness is generally the same level as the brightness of the light emitted by the HUD device 2 and so on, and is reduced to such an extent that it does not interfere with driving even if it enters the eyes of the driver 12.
  • the HUD device 2 includes the display panel 102, the mirrors 104 and 106, and the low reflection member 108.
  • the display panel 102 projects an image.
  • the mirrors 104 and 106 reflect the image projected from the display panel 102.
  • the low reflection member 108 is provided between the display panel 102 and the mirror 104.
  • the reflectance of the low reflection member 108 is lower than the reflectance of the display panel 102.
  • the display panel 102 is arranged in a posture in which the main optical path 20 projected from the display panel 102 and reflected by the mirrors 104 and 106 to the outside of the HUD device 2 and the normal line N of the display panel 102 are not parallel.
  • the mirrors 104 and 106 are arranged on the optical path of the light incident from the outside of the HUD device 2 along the main optical path 20 and reflected by the display panel 102.
  • the display panel 102 has a posture in which the normal line N is not parallel to the main optical path 20, and therefore, when external light (hereinafter, also simply referred to as light) enters along the main optical path 20 from the outside of the HUD device 2. Even so, it is avoided that the light travels in the opposite direction along the main optical path 20 after being reflected by the display panel 102. As a result, the reflected light is prevented from being emitted from the HUD device 2 along the main optical path 20. In addition, when the light reflected by the display panel 102 travels toward the mirror 104, it may be reflected by the mirror 104 and travel toward the display panel 102 again.
  • external light hereinafter, also simply referred to as light
  • the luminance of this light is reduced by being reflected twice by the low reflection member 108 and the display panel 102 provided between the display panel 102 and the mirror 104.
  • the driving by the driver 12 is hindered. Is avoided.
  • an increase in the size of the HUD device 2 is avoided. In this way, the HUD device 2 can suppress emission of light that hinders operation even when external light is incident while preventing an increase in size.
  • the display panel 102 and the mirror 104 may be arranged in a positional relationship in which light reflected by the display panel 102 is reflected by the display panel 102 after being reflected by the mirror 104.
  • the display panel 102 and the mirror 104 may be arranged in a positional relationship in which light reflected by the display panel 102 travels in the opposite direction along the main optical path 20 after being reflected by the mirror 104.
  • the light reflected by the mirror 104 travels in the opposite direction along the optical path in which the light reflected from the display panel 102 proceeds from the outside of the HUD device 2 toward the mirror 104.
  • This light is reflected twice by the low reflection member 108 and the display panel 102. Due to the two reflections described above, the intensity of the light is reduced to an intensity obtained by multiplying the square of the reflectance of the low reflection member 108 as compared with the incident light. Therefore, even when the HUD device 2 reflects the incident light by the display panel 102 and emits the light to the outside, the HUD device 2 reduces the intensity of the emitted light and interferes with the driving by the driver 12. Emitting can be suppressed.
  • the low reflection member 108 may be provided on the display panel 102.
  • the low reflection member 108 is more easily provided between the display panel 102 and the mirror 104, and the reflectance by the display panel 102 can be reduced.
  • the low reflection member 108 may be an antiglare film.
  • the low reflection member 108 can be realized more easily in the HUD device 2.
  • the present disclosure can be used for a HUD device or the like that can suppress emission of light that hinders driving even when external light is incident while preventing an increase in size. Specifically, it can be used for a HUD device or the like that displays vehicle navigation information and the like.
  • HUD device Head-up display device

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instrument Panels (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
PCT/JP2018/016896 2017-05-11 2018-04-26 ヘッドアップディスプレイ装置 WO2018207630A1 (ja)

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JP2017-094356 2017-05-11
JP2017094356A JP6671041B2 (ja) 2017-05-11 2017-05-11 ヘッドアップディスプレイ装置

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7483355B2 (ja) 2019-11-27 2024-05-15 京セラ株式会社 ヘッドアップディスプレイ、ヘッドアップディスプレイシステム及び移動体
JP7426627B2 (ja) 2020-02-14 2024-02-02 パナソニックＩｐマネジメント株式会社 ヘッドアップディスプレイ
JP7516868B2 (ja) * 2020-05-28 2024-07-17 Ｔｏｐｐａｎホールディングス株式会社 ヘッドアップディスプレイ

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004189112A (ja) * 2002-12-11 2004-07-08 Calsonic Kansei Corp ヘッドアップディスプレイ
JP2006248322A (ja) * 2005-03-09 2006-09-21 Yazaki Corp 車両用表示装置
JP2009115908A (ja) * 2007-11-02 2009-05-28 Fujinon Corp ミラー光学系及びヘッドアップディスプレイ装置
US20090141363A1 (en) * 2006-12-04 2009-06-04 Sung Chul Shin Head up display device
JP2015079227A (ja) * 2013-10-18 2015-04-23 株式会社 オルタステクノロジー 液晶表示装置及びヘッドアップディスプレイ
WO2015093294A1 (ja) * 2013-12-18 2015-06-25 株式会社オルタステクノロジー 液晶表示装置及びヘッドアップディスプレイ装置
JP2015152732A (ja) * 2014-02-13 2015-08-24 株式会社 オルタステクノロジー ヘッドアップディスプレイ装置
JP2016102871A (ja) * 2014-11-27 2016-06-02 日本精機株式会社 ヘッドアップディスプレイ装置及び液晶表示装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004189112A (ja) * 2002-12-11 2004-07-08 Calsonic Kansei Corp ヘッドアップディスプレイ
JP2006248322A (ja) * 2005-03-09 2006-09-21 Yazaki Corp 車両用表示装置
US20090141363A1 (en) * 2006-12-04 2009-06-04 Sung Chul Shin Head up display device
JP2009115908A (ja) * 2007-11-02 2009-05-28 Fujinon Corp ミラー光学系及びヘッドアップディスプレイ装置
JP2015079227A (ja) * 2013-10-18 2015-04-23 株式会社 オルタステクノロジー 液晶表示装置及びヘッドアップディスプレイ
WO2015093294A1 (ja) * 2013-12-18 2015-06-25 株式会社オルタステクノロジー 液晶表示装置及びヘッドアップディスプレイ装置
JP2015152732A (ja) * 2014-02-13 2015-08-24 株式会社 オルタステクノロジー ヘッドアップディスプレイ装置
JP2016102871A (ja) * 2014-11-27 2016-06-02 日本精機株式会社 ヘッドアップディスプレイ装置及び液晶表示装置

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JP2018189901A (ja) 2018-11-29

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