WO2018116896A1 - Head-up display device - Google Patents

Head-up display device Download PDF

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Publication number
WO2018116896A1
WO2018116896A1 PCT/JP2017/044469 JP2017044469W WO2018116896A1 WO 2018116896 A1 WO2018116896 A1 WO 2018116896A1 JP 2017044469 W JP2017044469 W JP 2017044469W WO 2018116896 A1 WO2018116896 A1 WO 2018116896A1
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WO
WIPO (PCT)
Prior art keywords
screen
display
projector
image
light
Prior art date
Application number
PCT/JP2017/044469
Other languages
French (fr)
Japanese (ja)
Inventor
芽久実 佐藤
一夫 諸橋
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
Priority to JP2018557691A priority Critical patent/JP7076065B2/en
Publication of WO2018116896A1 publication Critical patent/WO2018116896A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the present invention relates to a head-up display device.
  • a conventional head-up display device projects a part of display light from a single projector onto a nearby display screen, and another part of the display light is disposed closer to the projector than the nearby display screen.
  • the viewer can display the near display projected on the near display screen and the far display displayed on the far display screen at a position farther from the viewer than the near display.
  • the conventional head-up display device may be configured such that the distant display appears to be inclined toward the far side as viewed from the viewer.
  • the distant display screen has been arranged so as to be greatly inclined with respect to the display light. That is, when the distant display screen is arranged to be inclined with respect to the display light, the distant side of the distant display screen is arranged close to the projector side, and the vicinity side is arranged apart from the projector side, There is a problem in that unevenness in display luminance occurs because the far side is viewed brightly and the near side is viewed dark in the far display plane viewed by the viewer.
  • the present invention focuses on the above-mentioned problems and provides a head-up display device capable of suppressing unevenness in display luminance even when a screen is arranged to be inclined with respect to display light.
  • the head-up display device includes a projector that projects display light, an image control unit that controls the projector, a proximity portion that projects the display light and is close to the projector, and the projector.
  • the display light is projected from the projector in which the brightness of the adjacent part is dark with respect to the part.
  • the present invention can provide a head-up display device that can suppress unevenness in display luminance even when the screen is arranged to be inclined with respect to the display light.
  • a head-up display device (hereinafter referred to as a HUD device) 100 is mounted on, for example, an automobile, and as shown in FIG. 1, a housing 10, a projection device 20, a first screen 30, A second screen 40, a plane mirror (relay optical system) 50, a concave mirror (relay optical system) 60, and an image control unit 80 are provided.
  • the HUD device 100 uses a plane mirror 50 and a concave mirror 60 to display a first display image M1 projected on the first screen 30 by the projection device 20 and a second display image M2 projected on the second screen 40 by the projection device 20.
  • the first virtual image V1 of the first display image M1 and the second virtual image V2 of the second display image M2 are displayed to the user E.
  • the housing 10 is formed of, for example, black light-shielding synthetic resin, and houses the projection device 20, the first screen 30, the second screen 40, the plane mirror 50, and the concave mirror 60 inside, and includes an image control unit 80 outside. ing.
  • the housing 10 has an opening 10a that allows display light N to be described later to pass through the windshield 200, and the opening 10a is covered with a translucent cover 10b.
  • the projection device 20 emits the first projection light L1 indicating the first display image M1 and the second projection light L2 indicating the second display image M2 toward the first screen 30 and the second screen 40,
  • the first display image M1 and the second display image M2 are formed on the first screen 30 and the second screen 40.
  • the detailed configuration of the projection device 20 will be described in detail later.
  • the first screen 30 is a screen arranged close to a projector 21 (to be described later) of the projection device 20 and corresponds to the proximity placement screen of the present invention.
  • the first screen 30 receives the first projection light L1 emitted from the projection device 20 on the back surface,
  • This is a transmission screen that displays the first display image M1 on the front surface side, and is configured by, for example, a holographic diffuser, a microlens array, a diffusion plate, or the like.
  • the first screen 30 displays the first display image M1
  • the first display light N1 indicating the first display image M1 is projected onto the windshield 200 by the plane mirror 50 and the concave mirror 60, and the direction of the user E by the windshield 200. Reflected by (eye box).
  • the user E can visually recognize the 1st virtual image V1 on the other side of the windshield 200.
  • FIG. 2 the first screen 30 has a concave display area provided with a cutout portion 30a obtained by cutting out a part of a substantially rectangular outer edge portion into a rectangular shape. Therefore, the first virtual image V1 also has a concave display area.
  • the second projection light L2 reaches the second screen 40 described later through the notch 30a of the first screen 30 as shown in FIG.
  • the second screen 40 is a screen arranged on the projector 21 of the projection apparatus 20 which will be described later, spaced from the first screen 30, corresponds to the spaced arrangement screen of the present invention, and matches the notch 30 a of the first screen 30.
  • it is constituted by a holographic diffuser, a microlens array, a diffusion plate, or the like.
  • the second display light N2 indicating the second display image M2 is projected onto the windshield 200 by the plane mirror 50 and the concave mirror 60, and the windshield 200 viewed from the user E is displayed.
  • the second virtual image V2 is displayed on the other side.
  • the first screen 30 is arranged closer to the projection device 20 than the second screen 40. That is, the optical path length of the first display light N1 traveling from the first screen 30 toward the user E is longer than the optical path length of the second display light N2 traveling from the second screen 40 toward the user E. Therefore, the distance (display distance) from the user E to the position where the first virtual image V1 is displayed is longer than the distance (display distance) from the user E to the position where the second virtual image V2 is displayed.
  • the HUD device 100 can display the first virtual image V1 so that it is at a position farther than the second virtual image V2.
  • the first virtual image V1 is inclined, its display distance is 3 to 5 m, and the display distance of the second virtual image V2 is 2 m.
  • the first screen 30 is arranged to be inclined at a predetermined angle or more with respect to the optical axis of the first display light N1.
  • the curved surface shape of the first reflection surface 231 is gradually changed to connect the first projection light L1.
  • the image distance can be gradually changed. Therefore, even when the first screen 30 is tilted by a predetermined angle or more with respect to the optical axis, the first display image M1 can be formed in a wide range (including the entire area) of the first screen 30, and from the user E
  • the first virtual image V1 that has a sense of depth and is not blurred can be visually recognized.
  • the second screen 40 is disposed so as to have a predetermined angle (including 0 degrees) with respect to the optical axis of the second display light N2 that travels from the second screen 40 toward the user E.
  • the plane mirror (relay optical system) 50 is formed by, for example, forming a reflective film on the surface of a base material made of synthetic resin or glass material by means of vapor deposition or the like, and emitted from the first screen 30 and the second screen 40.
  • the first display light N1 and the second display light N2 are reflected toward the concave mirror 60.
  • the first display image M1 illustrated in the vicinity of the plane mirror 50 shows an image projected on the plane mirror 50, and is illustrated in order to facilitate understanding of which is the top and bottom when displayed as the first virtual image V1. It is a thing.
  • the concave mirror (relay optical system) 60 is formed, for example, by forming a reflective film on the surface of a base material made of a synthetic resin material by means such as vapor deposition.
  • the first display light N1 reflected by the plane mirror 50, the second display It is a mirror having a concave free-form surface that further reflects the light N2 and emits it toward the windshield 200.
  • 61 is an electric motor that adjusts the angle of the concave mirror 60, and its operation is controlled by an image control unit 80 described later.
  • the first display light N1 and the second display light N2 reflected by the concave mirror 60 pass through the translucent cover 10b provided in the opening 10a of the housing 10 and reach the windshield 200.
  • the first display light N1 and the second display light N2 reflected by the windshield 200 form a first virtual image V1 and a second virtual image V2 at a front position of the windshield 200.
  • the 1st display image M1 illustrated in the vicinity of the concave mirror 60 and the windshield 200 shows the image projected on the concave mirror 60 and the windshield 200, respectively, and when it displays as the 1st virtual image V1, which is up-down It is shown for ease of understanding.
  • the HUD device 100 can cause the user E to visually recognize both the virtual image V (the first virtual image V1 and the second virtual image V2) and the outside scene that actually exists in front of the windshield 200.
  • the concave mirror 60 has a function as a magnifying glass, and magnifies the display image M displayed on the projection device 20 and reflects it to the windshield 200 side. That is, the first virtual image V1 and the second virtual image V2 visually recognized by the user E are images in which the first display image M1 and the second display image M2 displayed by the projection device 20 are enlarged.
  • the concave mirror 60 also has a function of reducing the distortion of the first virtual image V1 and the second virtual image V2 caused by the windshield 200 being a curved surface.
  • the projection apparatus 20 includes a projector 21 that generates and emits first projection light L1 and second projection light L2, and first projection light L1 and second projection incident from the projector 21.
  • a first screen 30 that includes a fold mirror 22 that reflects and reflects the light L2 and an imaging position adjustment mirror 23 that adjusts the imaging distance of the light incident from the fold mirror 22, and is separated from the projection apparatus 20 by a different distance.
  • the first projection light L1 and the second projection light L2 are imaged on the second screen 40 and the second screen 40, respectively.
  • the projector 21 has a reflective display element such as DMD (Digital MicroMirror Device) and LCOS (registered trademark: Liquid Crystal On Silicon), and a transmissive display element such as a TFT (Thin Film Transistor) liquid crystal panel, and an image control unit. Based on the control signal from 80, the first projection light L1 and the second projection light L2 for displaying the first display image M1 and the second display image M2 are emitted toward the fold mirror 22.
  • DMD Digital MicroMirror Device
  • LCOS registered trademark: Liquid Crystal On Silicon
  • TFT Thin Film Transistor
  • the distorted virtual image V (first virtual image V1, first
  • the display image M (first display image M1, second display image M2) distorted in advance in consideration of the optical characteristics and arrangement of the respective optical members is controlled so as not to become two virtual images V2).
  • the fold mirror 22 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin or a glass material by means such as vapor deposition, and the first projection light L1 and the second projection emitted from the projector 21. This is a plane mirror that reflects the light L2 to an imaging position adjusting mirror 23 described later.
  • the package of the projection device 20 can be made more compact.
  • a plurality of fold mirrors 22 may be provided between the projector 21 and the imaging position adjusting mirror 23, or the fold mirror 22 may be omitted.
  • the imaging position adjusting mirror 23 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin material or a glass material by means such as vapor deposition, and the first projection light L1 is applied on the same base material. It has the 1st reflective surface 231 which receives light, and the 2nd reflective surface 232 which receives the 2nd projection light L2.
  • the first reflecting surface 231 is formed by a flat reflecting surface, and the received first projection light L1 is reflected on the first screen 30 without changing the imaging distance.
  • a first display image M1 is formed on the surface side of the image.
  • the second reflection surface 232 is formed by a free-form surface having a convex reflection surface, and the received second projection light L2 is reflected on the second screen 40 by changing the imaging distance to be longer.
  • a second display image M2 is formed on the surface side of the image.
  • the imaging position adjusting mirror 23 in the present embodiment is different in the curved shape of the first reflecting surface 231 that reflects the first projection light L1 and the second reflecting surface 232 that reflects the second projection light L2.
  • the imaging distance can be made different between the first projection light L1 and the second projection light L2 simply by receiving the projection light L from one projector 21. Therefore, the first virtual image V1 and the second virtual image V2 visually recognized by the user E can be displayed at different display distances, and the information displayed as the first virtual image V1 and the information displayed as the second virtual image V2. It can be differentiated, and the identifiability of information can be improved.
  • the imaging distance between at least the first projection light L1 and the second projection light L2 emitted from the same projector 21 can be made different, the cost can be reduced compared with the case where a plurality of projectors 21 are provided. be able to.
  • the projection light L from the projector 21 is applied to the imaging position adjusting mirror 23. Since at least the imaging distance between the first projection light L1 and the second projection light L2 can be made different by simply irradiating, space saving can be realized without complicating the optical path of the projection light L. Further, the relative positions of the first reflecting surface 231 and the second reflecting surface 232 are not easily shifted due to an assembly error or the like, and the first projection light L1 and the second projection light L2 are accurately transmitted to the first screen 30 and the second screen. 40 can be imaged.
  • the projector 21 of the present embodiment does not project the projection light L for generating an image near the boundary between the first reflecting surface 231 and the second reflecting surface 232 of the imaging position adjusting mirror 23.
  • the first display image M1 to be displayed on the first screen 30 is the first display image M1. It is possible to prevent the image from being displayed on the second screen 40.
  • the HUD device 100 mainly includes a control unit 81, a storage unit 82, a driving unit 83, a projector 21, and an electric motor 61 that drives the concave mirror 60.
  • the image control unit 80 according to the present embodiment includes a control unit 81 and a storage unit 82.
  • the image controller 80 is mounted on a printed circuit board (not shown) provided outside the housing of the HUD device 100. Note that the image control unit 80 may be built in the housing of the HUD device 100.
  • the control means 81 is composed of a microcomputer, and includes a CPU that executes processing, a RAM that temporarily stores calculation results, display data, and the like, and a ROM that stores processing programs to be described later.
  • the control means 81 is connected to the multiple signal line B, and receives control device information of various control devices connected to the multiple signal line B.
  • control devices connected to the multiple signal line B include a vehicle ECU 90, an air conditioner (hereinafter referred to as an air conditioner) 91, an audio 92 mounted on the vehicle, a navigation device 93, and the like.
  • the control device information input to the control means 81 includes various vehicle travel information relating to the vehicle speed, engine speed, remaining fuel amount and engine coolant temperature of the vehicle ECU 90, seat belt alarm, tire air pressure alarm, ABS (Anti-lock brake system) Vehicle information such as alarm information such as abnormality alarm, engine coolant temperature alarm, half door warning, remaining fuel warning, air conditioner 91 air conditioning management information, audio 92 music selection information or radio reception information And route information of the navigation device 93 and GPS reception information.
  • the control means 81 performs predetermined calculation processing based on the vehicle information input from various control devices and information from the various control devices, and generates image data to be projected by the projector 21.
  • the control unit 81 generates gradation correction image data in which the gradation data (adjustment data related to gradation) stored in the storage unit 82 is superimposed on the image data. Then, the control unit 81 outputs to the projector 21 via the driving unit 15, and the projector 21 projects the projection light L.
  • the superimposition of the image data and the gradation data need not be calculated only by the control means 81, and may be calculated by a graphic display controller different from the control means 81.
  • the storage means 82 uses a storage medium such as an EEPROM, a flash memory, and a backup RAM.
  • the storage means 82 includes image data relating to various display items relating to the vehicle traveling information, the alarm information, and the control device information displayed by the projector 21; Key data is stored in advance.
  • FIG. 4 shows the gradation data TD, which is gradation data TD related to the brightness of the first screen 30.
  • the gradation data TD is set so that the luminance of the first virtual image V1 is uniform when the user E visually recognizes the first virtual image V1 as a virtual image display.
  • the ratio of the luminance of the first projected light L1 between the adjacent portion and the separated portion on the first screen 30 is, for example, , 100: 50
  • the gradation data TD gradually changes from 50% to 100% in transmittance from the neighboring site NP to the separated site FP (the transmittance of 100% means that light is not blocked).
  • the user E visually recognizes the gradation-corrected image data obtained by synthesizing the entire white image data and the gradation data TD as the first virtual image, the proximity part NP and the separation part FP are displayed with a uniform luminance of 50:50. Is done.
  • the gradation data TD is not necessarily proportional to the stepwise change from the proximity part to the separation part.
  • the transmittance of the gradation data TD may be adjusted in accordance with the luminance unevenness of the first screen 30 and set so that display with reduced luminance unevenness is achieved on the entire surface when displaying a virtual image.
  • the gradation data TD may be stored in a rewritable state by an operation by the user E.
  • the drive unit 83 is a drive circuit that operates the electric motor 61 or displays a predetermined display on the projector 21, and is provided in each of the electric motor 61 and the projector 21. In the present embodiment, the description is simplified. To be single.
  • the control means 81 inputs various information and generates image data by performing predetermined calculation processing.
  • control means 81 projects gradation correction image data in which the gradation data TD is superimposed on the generated image data. Therefore, the viewer can clearly grasp the vehicle information by visually recognizing the display with reduced luminance unevenness.
  • the HUD device 100 includes the projector 21 that projects the display light N, the image control unit 80 that controls the projector 21, the proximity portion that is projected to the display light N and is close to the projector 21, and the projector 21.
  • the image control unit 80 includes the screen 30 disposed so as to have a separated portion away from the screen 30.
  • the screen 30 is single, and includes an inclined arrangement screen 30 that is inclined with respect to the display light N so that the projector 21 has a proximity part and a separation part from the projector 21, and the image control unit 80. Is arranged such that a single screen 30 is tilted with respect to the display light N by projecting the display light from the projector with the darkness of the proximity part to the separated part of the inclined arrangement screen 30. Even in such a case, it is possible to provide the HUD device 100 capable of suppressing display luminance unevenness.
  • the image control unit 80 projects the display light N having a lower brightness from the projector 21 toward the adjacent part of the screen 30, thereby arranging the screen 30 to be inclined with respect to the display light N. Even in such a case, it is possible to provide the HUD device 100 capable of suppressing display luminance unevenness.
  • the display luminance unevenness of the proximity portion and the separation portion of the first screen 30 is suppressed, but the first screen 30 and the second screen 40 are employed to suppress display luminance unevenness. Also good.
  • the two screens 30 and 40 are close arrangement screens in which the first screen 30 is arranged in proximity to the projector 21 corresponding to the proximity part, and the second screen 40 is from the projector 21 that is the separation part.
  • the image control unit 80 supplies the display light N having a low luminance of the first screen 30 that is the proximity screen to the second screen 40 that is the separation screen. It is to project from.
  • the HUD device 100 capable of suppressing display luminance unevenness between the screens 30 and 40 is provided. Can do.
  • the number of screens 30 and 40 is not limited to two.
  • the gradation correction image data is generated by superimposing the gradation data TD on the image data.
  • the gradation correction image data is obtained by performing arithmetic processing based on the gradation data.
  • the tone correction image data may be generated by correcting the image data in pixel units of the image data.
  • the present invention is suitable for a head-up display device having a proximity part and a separation part on a screen for projecting an image.

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Abstract

The purpose of the present invention is to provide a head-up display device capable of suppressing display luminance unevenness even when a screen is inclined relative to display light. Provided is a head-up display device 100 that comprises a projector 21 for projecting display light N, an image control unit 80 for controlling the projector 21, and a screen 30 onto which the display light N is projected and that has a proximity portion near the projector 21 and a distant portion away from the projector 21, and in which the display light N is projected onto the screen 30 to display an image that can be viewed as a virtual image, wherein the image control unit 80 causes the projector 21 to project the display light N so that the proximity portion of the screen 30 shows lower luminance compared to the distant portion.

Description

ヘッドアップディスプレイ装置Head-up display device
　本発明は、ヘッドアップディスプレイ装置に関する。 The present invention relates to a head-up display device.
　従来のヘッドアップディスプレイ装置は、単一の投影機からの表示光の一部を近傍表示スクリーンに投影し、前記表示光の他の一部を前記近傍表示スクリーンより前記投影機側に配置される遠方表示スクリーンに投影することで、視認者に、前記近傍表示スクリーンに投影される近傍表示と、前記遠方表示スクリーンに投影され前記近傍表示よりも前記視認者から離れた位置に表示される遠方表示を視認させるものであった（例えば、特許文献１参照）。 A conventional head-up display device projects a part of display light from a single projector onto a nearby display screen, and another part of the display light is disposed closer to the projector than the nearby display screen. By projecting on the far display screen, the viewer can display the near display projected on the near display screen and the far display displayed on the far display screen at a position farther from the viewer than the near display. (For example, refer to Patent Document 1).
特開２０１６－４５２５２号公報Japanese Unexamined Patent Publication No. 2016-45252
　従来のヘッドアップディスプレイ装置は、前記遠方表示を、前記視認者から見て遠方に向かって傾斜して見えるような構成にする場合がある。この場合、前記遠方表示スクリーンを前記表示光に対して大きく傾斜させて配置することによって、前記視認者から見た前記遠方表示に表示輝度のムラが発生するという問題があった。つまり、前記遠方表示スクリーンを前記表示光に対して傾斜させて配置した場合、前記遠方表示スクリーンの遠方側を前記投影機側に近く、近傍側を前記投影機側から離して配置することとなり、前記視認者が視認する前記遠方表示の面内では遠方側が明るく、近傍側が暗く視認されることとなり、表示輝度のムラが発生するという問題があった。 The conventional head-up display device may be configured such that the distant display appears to be inclined toward the far side as viewed from the viewer. In this case, there has been a problem that uneven display brightness occurs in the distant display viewed from the viewer by arranging the distant display screen so as to be greatly inclined with respect to the display light. That is, when the distant display screen is arranged to be inclined with respect to the display light, the distant side of the distant display screen is arranged close to the projector side, and the vicinity side is arranged apart from the projector side, There is a problem in that unevenness in display luminance occurs because the far side is viewed brightly and the near side is viewed dark in the far display plane viewed by the viewer.
　そこで本発明は、前記問題点に着目し、スクリーンを表示光に対して傾斜させて配置した場合でも表示輝度のムラを抑制することが可能なヘッドアップディスプレイ装置を提供することである。 Therefore, the present invention focuses on the above-mentioned problems and provides a head-up display device capable of suppressing unevenness in display luminance even when a screen is arranged to be inclined with respect to display light.
　本発明のヘッドアップディスプレイ装置は、表示光を投影する投影機と、前記投影機を制御する画像制御部と、前記表示光が投影されるとともに前記投影機に近接した近接部位と前記投影機から離れた離間部位とを有するように配置されるスクリーンと、を備え、前記スクリーンに投影された前記表示光が虚像表示として視認可能なヘッドアップディスプレイ装置において、前記画像制御部は前記スクリーンの前記離間部位に対して前記近接部位の輝度が暗い前記表示光を前記投影機から投影させるものである。 The head-up display device according to the present invention includes a projector that projects display light, an image control unit that controls the projector, a proximity portion that projects the display light and is close to the projector, and the projector. A head-up display device in which the display light projected on the screen is visible as a virtual image display, wherein the image controller is configured to separate the screen. The display light is projected from the projector in which the brightness of the adjacent part is dark with respect to the part.
　本発明は、スクリーンを表示光に対して傾斜させて配置した場合でも表示輝度のムラを抑制することが可能なヘッドアップディスプレイ装置を提供することができる。 The present invention can provide a head-up display device that can suppress unevenness in display luminance even when the screen is arranged to be inclined with respect to the display light.
本発明の実施形態を示す概略図。Schematic which shows embodiment of this invention. 同実施形態のスクリーンの配置を示す斜視図。The perspective view which shows arrangement | positioning of the screen of the embodiment. 同実施形態の電気的構成を示すブロック図。The block diagram which shows the electric constitution of the same embodiment. 同実施形態の階調データを示す図。The figure which shows the gradation data of the embodiment. 同実施形態の第一虚像の表示輝度を示す図。The figure which shows the display brightness | luminance of the 1st virtual image of the embodiment.
　以下、本発明に係る実施形態について図面を参照して説明する。なお、本発明は下記の実施形態（図面の内容も含む。）によって限定されるものではない。下記の実施形態に変更（構成要素の削除も含む）を加えることができるのはもちろんである。また、以下の説明では、本発明の理解を容易にするために、公知の技術的事項の説明を適宜省略する。 Embodiments according to the present invention will be described below with reference to the drawings. In addition, this invention is not limited by the following embodiment (The content of drawing is also included). It goes without saying that changes (including deletion of components) can be added to the following embodiments. Moreover, in the following description, in order to make an understanding of this invention easy, description of a known technical matter is abbreviate | omitted suitably.
　ヘッドアップディスプレイ装置（以下、ＨＵＤ装置と記載する）１００は、例えば、自動車に搭載されるものであり、図１に示すように、筐体１０と、投影装置２０と、第一スクリーン３０と、第二スクリーン４０と、平面鏡（リレー光学系）５０と、凹面鏡（リレー光学系）６０と、画像制御部８０と、を備える。ＨＵＤ装置１００は、投影装置２０が第一スクリーン３０に投影した第一表示画像Ｍ１と、同じく投影装置２０が第二スクリーン４０に投影した第二表示画像Ｍ２とを、平面鏡５０と凹面鏡６０とで車両のフロントガラス２００に向けて反射することで、ユーザＥに対して第一表示画像Ｍ１の第一虚像Ｖ１と、第二表示画像Ｍ２の第二虚像Ｖ２とを表示する。 A head-up display device (hereinafter referred to as a HUD device) 100 is mounted on, for example, an automobile, and as shown in FIG. 1, a housing 10, a projection device 20, a first screen 30, A second screen 40, a plane mirror (relay optical system) 50, a concave mirror (relay optical system) 60, and an image control unit 80 are provided. The HUD device 100 uses a plane mirror 50 and a concave mirror 60 to display a first display image M1 projected on the first screen 30 by the projection device 20 and a second display image M2 projected on the second screen 40 by the projection device 20. By reflecting toward the windshield 200 of the vehicle, the first virtual image V1 of the first display image M1 and the second virtual image V2 of the second display image M2 are displayed to the user E.
　筐体１０は、例えば、黒色の遮光性合成樹脂から形成され、投影装置２０、第一スクリーン３０、第二スクリーン４０、平面鏡５０、凹面鏡６０を内部に収納し、外部に画像制御部８０を備えている。 The housing 10 is formed of, for example, black light-shielding synthetic resin, and houses the projection device 20, the first screen 30, the second screen 40, the plane mirror 50, and the concave mirror 60 inside, and includes an image control unit 80 outside. ing.
　筐体１０は、後述する表示光Ｎをフロントガラス２００に通過させる開口部１０ａを有し、この開口部１０ａは、透光性カバー１０ｂに覆われている。 The housing 10 has an opening 10a that allows display light N to be described later to pass through the windshield 200, and the opening 10a is covered with a translucent cover 10b.
　投影装置２０は、第一表示画像Ｍ１を示す第一投影光Ｌ１と、第二表示画像Ｍ２を示す第二投影光Ｌ２とを、第一スクリーン３０と第二スクリーン４０とに向けて出射し、第一スクリーン３０及び第二スクリーン４０上に第一表示画像Ｍ１，第二表示画像Ｍ２を結像するものである。投影装置２０の詳細な構成については、後に詳述する。 The projection device 20 emits the first projection light L1 indicating the first display image M1 and the second projection light L2 indicating the second display image M2 toward the first screen 30 and the second screen 40, The first display image M1 and the second display image M2 are formed on the first screen 30 and the second screen 40. The detailed configuration of the projection device 20 will be described in detail later.
　第一スクリーン３０は、投影装置２０の後述する投影機２１に近接配置したスクリーンで、本発明の近接配置スクリーンに相当し、投影装置２０から出射された第一投影光Ｌ１を背面で受光し、表面側に第一表示画像Ｍ１を表示する透過スクリーンであり、例えば、ホログラフィックディフューザ、マイクロレンズアレイ、拡散板等によって構成される。第一スクリーン３０が第一表示画像Ｍ１を表示すると、この第一表示画像Ｍ１を示す第一表示光Ｎ１は、平面鏡５０、凹面鏡６０によりフロントガラス２００に投影され、フロントガラス２００によりユーザＥの方向（アイボックス）に反射される。これにより、ユーザＥは、フロントガラス２００の向こう側に第一虚像Ｖ１を視認することができる。なお、本実施形態において第一スクリーン３０は、図２に示すように略矩形状の外縁部分の一部を矩形状に切り抜いた切り欠き部３０ａを設けた凹状の表示エリアを有する。従って、第一虚像Ｖ１も凹状の表示エリアを有する。なお、第二投影光Ｌ２は、図２に示すように第一スクリーン３０の切り欠き部３０ａを通って後述する第二スクリーン４０に到達する。 The first screen 30 is a screen arranged close to a projector 21 (to be described later) of the projection device 20 and corresponds to the proximity placement screen of the present invention. The first screen 30 receives the first projection light L1 emitted from the projection device 20 on the back surface, This is a transmission screen that displays the first display image M1 on the front surface side, and is configured by, for example, a holographic diffuser, a microlens array, a diffusion plate, or the like. When the first screen 30 displays the first display image M1, the first display light N1 indicating the first display image M1 is projected onto the windshield 200 by the plane mirror 50 and the concave mirror 60, and the direction of the user E by the windshield 200. Reflected by (eye box). Thereby, the user E can visually recognize the 1st virtual image V1 on the other side of the windshield 200. FIG. In the present embodiment, as shown in FIG. 2, the first screen 30 has a concave display area provided with a cutout portion 30a obtained by cutting out a part of a substantially rectangular outer edge portion into a rectangular shape. Therefore, the first virtual image V1 also has a concave display area. The second projection light L2 reaches the second screen 40 described later through the notch 30a of the first screen 30 as shown in FIG.
　第二スクリーン４０は、投影装置２０の後述する投影機２１に第一スクリーン３０より離間して配置したスクリーンで、本発明の離間配置スクリーンに相当し、第一スクリーン３０の切り欠き部３０ａに合致する形状で矩形状に形成され、投影装置２０から出射された第二投影光Ｌ２を背面で受光し、表面側に第二表示画像Ｍ２を表示する透過スクリーンであり、第一スクリーン３０と同様、例えば、ホログラフィックディフューザ、マイクロレンズアレイ、拡散板等によって構成される。第二スクリーン４０が第二表示画像Ｍ２を表示すると、この第二表示画像Ｍ２を示す第二表示光Ｎ２は、平面鏡５０、凹面鏡６０によりフロントガラス２００に投影され、ユーザＥから見たフロントガラス２００の向こう側に第二虚像Ｖ２を表示する。 The second screen 40 is a screen arranged on the projector 21 of the projection apparatus 20 which will be described later, spaced from the first screen 30, corresponds to the spaced arrangement screen of the present invention, and matches the notch 30 a of the first screen 30. Is a transmission screen that is formed in a rectangular shape and receives the second projection light L2 emitted from the projection device 20 on the back surface and displays the second display image M2 on the front surface side. For example, it is constituted by a holographic diffuser, a microlens array, a diffusion plate, or the like. When the second screen 40 displays the second display image M2, the second display light N2 indicating the second display image M2 is projected onto the windshield 200 by the plane mirror 50 and the concave mirror 60, and the windshield 200 viewed from the user E is displayed. The second virtual image V2 is displayed on the other side.
　図１に示すように、第一スクリーン３０は、第二スクリーン４０よりも投影装置２０の近くに配置される。すなわち、第一スクリーン３０からユーザＥに向けて進行する第一表示光Ｎ１の光路長は、第二スクリーン４０からユーザＥに向けて進行する第二表示光Ｎ２の光路長よりも長くなる。それゆえ、ユーザＥから第一虚像Ｖ１が表示される位置までの距離（表示距離）は、ユーザＥから第二虚像Ｖ２が表示される位置までの距離（表示距離）よりも長くなるので、本実施形態におけるＨＵＤ装置１００は、第一虚像Ｖ１が第二虚像Ｖ２よりも遠くの位置にあるように表示することができる。なお、本実施形態においては、第一虚像Ｖ１は傾斜しており、その表示距離は３～５ｍであり、第二虚像Ｖ２の表示距離は２ｍである。 As shown in FIG. 1, the first screen 30 is arranged closer to the projection device 20 than the second screen 40. That is, the optical path length of the first display light N1 traveling from the first screen 30 toward the user E is longer than the optical path length of the second display light N2 traveling from the second screen 40 toward the user E. Therefore, the distance (display distance) from the user E to the position where the first virtual image V1 is displayed is longer than the distance (display distance) from the user E to the position where the second virtual image V2 is displayed. The HUD device 100 according to the embodiment can display the first virtual image V1 so that it is at a position farther than the second virtual image V2. In the present embodiment, the first virtual image V1 is inclined, its display distance is 3 to 5 m, and the display distance of the second virtual image V2 is 2 m.
　また、第一スクリーン３０は、第一表示光Ｎ１の光軸に対して所定の角度以上傾けて配置してある。傾けて配置した第一スクリーン３０と投影機２１との間の第一投影光Ｌ１の光路長を考慮して、第一反射面２３１の曲面形状を徐変することで第一投影光Ｌ１の結像距離を徐変することができる。従って、第一スクリーン３０を光軸に対して所定の角度以上傾けた場合でも第一スクリーン３０の広い範囲（全領域も含む）で第一表示画像Ｍ１を結像させることができ、ユーザＥから奥行き感があり、ぼやけていない第一虚像Ｖ１を視認させることができる。 Further, the first screen 30 is arranged to be inclined at a predetermined angle or more with respect to the optical axis of the first display light N1. In consideration of the optical path length of the first projection light L1 between the inclined first screen 30 and the projector 21, the curved surface shape of the first reflection surface 231 is gradually changed to connect the first projection light L1. The image distance can be gradually changed. Therefore, even when the first screen 30 is tilted by a predetermined angle or more with respect to the optical axis, the first display image M1 can be formed in a wide range (including the entire area) of the first screen 30, and from the user E The first virtual image V1 that has a sense of depth and is not blurred can be visually recognized.
　第二スクリーン４０は、第二スクリーン４０からユーザＥに向かう第二表示光Ｎ２の光軸に対して所定の角度（０度も含む）を有するように配置されている。 The second screen 40 is disposed so as to have a predetermined angle (including 0 degrees) with respect to the optical axis of the second display light N2 that travels from the second screen 40 toward the user E.
　平面鏡（リレー光学系）５０は、例えば、合成樹脂やガラス材料からなる基材の表面に、蒸着等の手段により反射膜を形成したものであり、第一スクリーン３０，第二スクリーン４０から出射した第一表示光Ｎ１，第二表示光Ｎ２を、凹面鏡６０に向けて反射する。なお、平面鏡５０の近傍に図示した第一表示画像Ｍ１は、平面鏡５０に投影される画像を示し、第一虚像Ｖ１として表示した場合、どちらが上下であるかの理解を容易にするために、図示したものである。 The plane mirror (relay optical system) 50 is formed by, for example, forming a reflective film on the surface of a base material made of synthetic resin or glass material by means of vapor deposition or the like, and emitted from the first screen 30 and the second screen 40. The first display light N1 and the second display light N2 are reflected toward the concave mirror 60. The first display image M1 illustrated in the vicinity of the plane mirror 50 shows an image projected on the plane mirror 50, and is illustrated in order to facilitate understanding of which is the top and bottom when displayed as the first virtual image V1. It is a thing.
　凹面鏡（リレー光学系）６０は、例えば、合成樹脂材料からなる基材の表面に、蒸着等の手段により反射膜を形成したものであり、平面鏡５０で反射した第一表示光Ｎ１，第二表示光Ｎ２をさらに反射させ、フロントガラス２００に向けて出射する凹状の自由曲面を有するミラーである。６１は、凹面鏡６０の角度を調整する電動機であり、後述する画像制御部８０によって、動作を制御される。凹面鏡６０で反射した第一表示光Ｎ１，第二表示光Ｎ２は、筐体１０の開口部１０ａに設けられた透光性カバー１０ｂを透過して、フロントガラス２００に到達する。フロントガラス２００で反射された第一表示光Ｎ１，第二表示光Ｎ２は、フロントガラス２００の前方位置に第一虚像Ｖ１及び第二虚像Ｖ２を形成する。なお、凹面鏡６０、フロントガラス２００の近傍に図示した第一表示画像Ｍ１は、それぞれ凹面鏡６０、フロントガラス２００に投影される画像を示し、第一虚像Ｖ１として表示した場合、どちらが上下であるかの理解を容易にするために、図示したものである。 The concave mirror (relay optical system) 60 is formed, for example, by forming a reflective film on the surface of a base material made of a synthetic resin material by means such as vapor deposition. The first display light N1 reflected by the plane mirror 50, the second display It is a mirror having a concave free-form surface that further reflects the light N2 and emits it toward the windshield 200. 61 is an electric motor that adjusts the angle of the concave mirror 60, and its operation is controlled by an image control unit 80 described later. The first display light N1 and the second display light N2 reflected by the concave mirror 60 pass through the translucent cover 10b provided in the opening 10a of the housing 10 and reach the windshield 200. The first display light N1 and the second display light N2 reflected by the windshield 200 form a first virtual image V1 and a second virtual image V2 at a front position of the windshield 200. In addition, the 1st display image M1 illustrated in the vicinity of the concave mirror 60 and the windshield 200 shows the image projected on the concave mirror 60 and the windshield 200, respectively, and when it displays as the 1st virtual image V1, which is up-down It is shown for ease of understanding.
　これにより、ＨＵＤ装置１００は、虚像Ｖ（第一虚像Ｖ１及び第二虚像Ｖ２）とフロントガラス２００の前方に実際に存在する外景等の双方を、ユーザＥに視認させることができる。なお、凹面鏡６０は拡大鏡としての機能を有し、投影装置２０に表示された表示画像Ｍを拡大してフロントガラス２００側へ反射する。すなわち、ユーザＥに視認される第一虚像Ｖ１，第二虚像Ｖ２は投影装置２０が表示する第一表示画像Ｍ１，第二表示画像Ｍ２が拡大した像である。また、凹面鏡６０は、フロントガラス２００が曲面であることに起因する第一虚像Ｖ１及び第二虚像Ｖ２の歪みを軽減する機能も有する。 Thereby, the HUD device 100 can cause the user E to visually recognize both the virtual image V (the first virtual image V1 and the second virtual image V2) and the outside scene that actually exists in front of the windshield 200. The concave mirror 60 has a function as a magnifying glass, and magnifies the display image M displayed on the projection device 20 and reflects it to the windshield 200 side. That is, the first virtual image V1 and the second virtual image V2 visually recognized by the user E are images in which the first display image M1 and the second display image M2 displayed by the projection device 20 are enlarged. The concave mirror 60 also has a function of reducing the distortion of the first virtual image V1 and the second virtual image V2 caused by the windshield 200 being a curved surface.
　投影装置２０は、図１に示すように、第一投影光Ｌ１，第二投影光Ｌ２を生成して出射する投影機２１と、この投影機２１から入射した第一投影光Ｌ１，第二投影光Ｌ２を反射して折り返すフォールドミラー２２と、フォールドミラー２２から入射した光の結像距離を調整する結像位置調整ミラー２３と、を備え、投影装置２０から異なる距離だけ離れた第一スクリーン３０及び第二スクリーン４０のそれぞれに第一投影光Ｌ１及び第二投影光Ｌ２を結像させる。 As shown in FIG. 1, the projection apparatus 20 includes a projector 21 that generates and emits first projection light L1 and second projection light L2, and first projection light L1 and second projection incident from the projector 21. A first screen 30 that includes a fold mirror 22 that reflects and reflects the light L2 and an imaging position adjustment mirror 23 that adjusts the imaging distance of the light incident from the fold mirror 22, and is separated from the projection apparatus 20 by a different distance. The first projection light L1 and the second projection light L2 are imaged on the second screen 40 and the second screen 40, respectively.
　投影機２１は、ＤＭＤ（Digital MicroMirror Device）やＬＣＯＳ（登録商標：Liquid Crystal On Silicon）などの反射型表示素子やＴＦＴ（Thin Film transistor）液晶パネルなどの透過型表示素子を有し、画像制御部８０からの制御信号に基づき、第一表示画像Ｍ１及び第二表示画像Ｍ２を表示させるための第一投影光Ｌ１及び第二投影光Ｌ２をフォールドミラー２２に向けて出射する。なお、投影機２１は、第一スクリーン３０，第二スクリーン４０，平面鏡５０，凹面鏡６０，フロントガラス２００などを介してユーザＥに視認される際に、歪んだ虚像Ｖ（第一虚像Ｖ１，第二虚像Ｖ２）にならないように、それぞれの光学部材の光学特性及び配置などを考慮して予め歪ませた表示画像Ｍ（第一表示画像Ｍ１，第二表示画像Ｍ２）を表示するように制御される。 The projector 21 has a reflective display element such as DMD (Digital MicroMirror Device) and LCOS (registered trademark: Liquid Crystal On Silicon), and a transmissive display element such as a TFT (Thin Film Transistor) liquid crystal panel, and an image control unit. Based on the control signal from 80, the first projection light L1 and the second projection light L2 for displaying the first display image M1 and the second display image M2 are emitted toward the fold mirror 22. When the projector 21 is visually recognized by the user E through the first screen 30, the second screen 40, the plane mirror 50, the concave mirror 60, the windshield 200, etc., the distorted virtual image V (first virtual image V1, first The display image M (first display image M1, second display image M2) distorted in advance in consideration of the optical characteristics and arrangement of the respective optical members is controlled so as not to become two virtual images V2). The
　フォールドミラー２２は、例えば、合成樹脂やガラス材料からなる基材の表面に、蒸着等の手段により反射膜を形成したものであり、投影機２１から出射された第一投影光Ｌ１及び第二投影光Ｌ２を後述する結像位置調整ミラー２３に反射する平面鏡である。フォールドミラー２２を設けることで、投影装置２０のパッケージをよりコンパクトにすることができる。なお、投影機２１から結像位置調整ミラー２３までの間にフォールドミラー２２を複数設けてもよく、又はフォールドミラー２２を省略してもよい。 The fold mirror 22 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin or a glass material by means such as vapor deposition, and the first projection light L1 and the second projection emitted from the projector 21. This is a plane mirror that reflects the light L2 to an imaging position adjusting mirror 23 described later. By providing the fold mirror 22, the package of the projection device 20 can be made more compact. A plurality of fold mirrors 22 may be provided between the projector 21 and the imaging position adjusting mirror 23, or the fold mirror 22 may be omitted.
　結像位置調整ミラー２３は、例えば、合成樹脂材料やガラス材料などからなる基材の表面に蒸着等の手段により反射膜を形成したものであり、同一基材上に、第一投影光Ｌ１を受光する第一反射面２３１と、第二投影光Ｌ２を受光する第二反射面２３２とを有する。本実施形態において、第一反射面２３１は、反射面が平面で形成され、受光した第一投影光Ｌ１を、結像距離を変化させずに第一スクリーン３０に反射することで第一スクリーン３０の表面側に第一表示画像Ｍ１を結像する。また、第二反射面２３２は、反射面が凸の自由曲面で形成され、受光した第二投影光Ｌ２を、結像距離を長く変化させて第二スクリーン４０に反射することで第二スクリーン４０の表面側に第二表示画像Ｍ２を結像する。 The imaging position adjusting mirror 23 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin material or a glass material by means such as vapor deposition, and the first projection light L1 is applied on the same base material. It has the 1st reflective surface 231 which receives light, and the 2nd reflective surface 232 which receives the 2nd projection light L2. In the present embodiment, the first reflecting surface 231 is formed by a flat reflecting surface, and the received first projection light L1 is reflected on the first screen 30 without changing the imaging distance. A first display image M1 is formed on the surface side of the image. The second reflection surface 232 is formed by a free-form surface having a convex reflection surface, and the received second projection light L2 is reflected on the second screen 40 by changing the imaging distance to be longer. A second display image M2 is formed on the surface side of the image.
　すなわち、本実施形態における結像位置調整ミラー２３は、第一投影光Ｌ１を反射する第一反射面２３１と、第二投影光Ｌ２を反射する第二反射面２３２との曲面形状が異なるので、１つの投影機２１からの投影光Ｌを受光するだけで第一投影光Ｌ１と第二投影光Ｌ２とで結像距離を異ならせることができる。従って、ユーザＥが視認する第一虚像Ｖ１と第二虚像Ｖ２とを異なる表示距離で表示することができ、第一虚像Ｖ１として表示される情報と、第二虚像Ｖ２として表示される情報とで差別化することができ、情報の識別性を高めることができる。また、同一の投影機２１から出射される少なくとも第一投影光Ｌ１と第二投影光Ｌ２との結像距離を異ならせることができるため、投影機２１を複数設ける場合と比較してコストを抑えることができる。 That is, the imaging position adjusting mirror 23 in the present embodiment is different in the curved shape of the first reflecting surface 231 that reflects the first projection light L1 and the second reflecting surface 232 that reflects the second projection light L2. The imaging distance can be made different between the first projection light L1 and the second projection light L2 simply by receiving the projection light L from one projector 21. Therefore, the first virtual image V1 and the second virtual image V2 visually recognized by the user E can be displayed at different display distances, and the information displayed as the first virtual image V1 and the information displayed as the second virtual image V2. It can be differentiated, and the identifiability of information can be improved. Further, since the imaging distance between at least the first projection light L1 and the second projection light L2 emitted from the same projector 21 can be made different, the cost can be reduced compared with the case where a plurality of projectors 21 are provided. be able to.
　また、結像位置調整ミラー２３における第一反射面２３１と第二反射面２３２とは、同一基材上に形成されているため、投影機２１からの投影光Ｌを結像位置調整ミラー２３に照射するだけで少なくとも第一投影光Ｌ１と第二投影光Ｌ２との結像距離を異ならせることができるため、投影光Ｌの光路を複雑化することなく省スペースを実現することができる。また、第一反射面２３１と第二反射面２３２との相対的な位置が組み立て誤差などでずれにくく、精度よく第一投影光Ｌ１と第二投影光Ｌ２とを第一スクリーン３０及び第二スクリーン４０に結像させることができる。 Further, since the first reflecting surface 231 and the second reflecting surface 232 in the imaging position adjusting mirror 23 are formed on the same base material, the projection light L from the projector 21 is applied to the imaging position adjusting mirror 23. Since at least the imaging distance between the first projection light L1 and the second projection light L2 can be made different by simply irradiating, space saving can be realized without complicating the optical path of the projection light L. Further, the relative positions of the first reflecting surface 231 and the second reflecting surface 232 are not easily shifted due to an assembly error or the like, and the first projection light L1 and the second projection light L2 are accurately transmitted to the first screen 30 and the second screen. 40 can be imaged.
　また、本実施形態の投影機２１は、結像位置調整ミラー２３の第一反射面２３１と第二反射面２３２との境界付近には画像を生成するための投影光Ｌを投影しない。斯かる構成により、投影光Ｌの結像位置調整ミラー２３に対する投影位置がＨＵＤ装置１００の組み付け誤差や振動などによってずれてしまった場合でも、第一スクリーン３０に映したい第一表示画像Ｍ１が第二スクリーン４０に映されることを防止できる。 Further, the projector 21 of the present embodiment does not project the projection light L for generating an image near the boundary between the first reflecting surface 231 and the second reflecting surface 232 of the imaging position adjusting mirror 23. With such a configuration, even when the projection position of the projection light L with respect to the imaging position adjusting mirror 23 is shifted due to an assembly error or vibration of the HUD device 100, the first display image M1 to be displayed on the first screen 30 is the first display image M1. It is possible to prevent the image from being displayed on the second screen 40.
　次に、図３を用いてＨＵＤ装置１００の電気的構成について説明する。ＨＵＤ装置１００は、制御手段８１と、記憶手段８２と、駆動手段８３と、投影機２１と、凹面鏡６０を駆動する電動機６１と、から主に構成されている。なお、本実施形態の画像制御部８０は、制御手段８１と、記憶手段８２とから構成されている。なお、画像制御部８０は、ＨＵＤ装置１００の筐体の外部に設けられた図示しないプリント回路基板などに実装されている。なお、画像制御部８０は、ＨＵＤ装置１００の筐体の内部に内蔵してもよい。 Next, the electrical configuration of the HUD device 100 will be described with reference to FIG. The HUD device 100 mainly includes a control unit 81, a storage unit 82, a driving unit 83, a projector 21, and an electric motor 61 that drives the concave mirror 60. Note that the image control unit 80 according to the present embodiment includes a control unit 81 and a storage unit 82. The image controller 80 is mounted on a printed circuit board (not shown) provided outside the housing of the HUD device 100. Note that the image control unit 80 may be built in the housing of the HUD device 100.
　制御手段８１は、マイクロコンピュータからなるもので、処理を実行するＣＰＵ，演算結果や表示データ等を一時的に記憶するＲＡＭ及び後述する処理プログラムが記憶されたＲＯＭ等を有するものである。制御手段８１は、多重信号ラインＢが接続され、多重信号ラインＢに接続されている各種制御機器の制御機器情報が入力される。 The control means 81 is composed of a microcomputer, and includes a CPU that executes processing, a RAM that temporarily stores calculation results, display data, and the like, and a ROM that stores processing programs to be described later. The control means 81 is connected to the multiple signal line B, and receives control device information of various control devices connected to the multiple signal line B.
　多重信号ラインＢに接続されている各種制御機器としては、車両ＥＣＵ９０、エアーコンディショナー（以下、エアコンという）９１、車両に搭載されるオーディオ９２及びナビゲーション装置９３等がある。従って、制御手段８１に入力される前記制御機器情報としては、車両ＥＣＵ９０の車両の速度、エンジン回転数、燃料残量及びエンジン冷却水温度に関する各種車両走行情報、シートベルト警報、タイヤ空気圧警報、ＡＢＳ（アンチロックブレーキシステム）異常警報、エンジン冷却水の温度警報、半ドア警告、残燃料警告等の関する警報情報などの車両情報、エアコン９１の空調管理情報、オーディオ９２の音楽選曲情報あるいはラジオ受信情報、ナビゲーション装置９３のルート情報やＧＰＳ受信情報などがある。 Various control devices connected to the multiple signal line B include a vehicle ECU 90, an air conditioner (hereinafter referred to as an air conditioner) 91, an audio 92 mounted on the vehicle, a navigation device 93, and the like. Accordingly, the control device information input to the control means 81 includes various vehicle travel information relating to the vehicle speed, engine speed, remaining fuel amount and engine coolant temperature of the vehicle ECU 90, seat belt alarm, tire air pressure alarm, ABS (Anti-lock brake system) Vehicle information such as alarm information such as abnormality alarm, engine coolant temperature alarm, half door warning, remaining fuel warning, air conditioner 91 air conditioning management information, audio 92 music selection information or radio reception information And route information of the navigation device 93 and GPS reception information.
　制御手段８１は、各種制御機器から入力される前記車両情報や各種制御機器からの情報に基づいて所定の演算処理を行い、投影機２１で投影する画像データを生成する。また、制御手段８１は、記憶手段８２に記憶した階調データ（階調に関する調整データ）を前記画像データに重畳した階調補正画像データを生成する。そして、制御手段８１は、駆動手段１５を介し投影機２１に出力し、投影機２１は投影光Ｌを投影する。なお、画像データ、階調データの重畳は、制御手段８１のみで演算する必要はなく、制御手段８１とは別のグラフィックディスプレイコントローラで演算してもよい。 The control means 81 performs predetermined calculation processing based on the vehicle information input from various control devices and information from the various control devices, and generates image data to be projected by the projector 21. The control unit 81 generates gradation correction image data in which the gradation data (adjustment data related to gradation) stored in the storage unit 82 is superimposed on the image data. Then, the control unit 81 outputs to the projector 21 via the driving unit 15, and the projector 21 projects the projection light L. The superimposition of the image data and the gradation data need not be calculated only by the control means 81, and may be calculated by a graphic display controller different from the control means 81.
　記憶手段８２は、ＥＥＰＲＯＭ，フラッシュメモリ及びバックアップＲＡＭ等の記憶媒体が用いられ、投影機２１により表示される前記車両走行情報，前記警報情報及び前記制御機器情報に関する各種表示項目に関する画像データと、階調データを予め記憶している。 The storage means 82 uses a storage medium such as an EEPROM, a flash memory, and a backup RAM. The storage means 82 includes image data relating to various display items relating to the vehicle traveling information, the alarm information, and the control device information displayed by the projector 21; Key data is stored in advance.
　なお、図４は、階調データＴＤを示すものであり、第一スクリーン３０の輝度に関する階調データＴＤである。階調データＴＤは、図５で示すように、虚像表示としてユーザＥが第一虚像Ｖ１を視認した時に、第一虚像Ｖ１の輝度が均一になるように設定されている。 FIG. 4 shows the gradation data TD, which is gradation data TD related to the brightness of the first screen 30. As shown in FIG. 5, the gradation data TD is set so that the luminance of the first virtual image V1 is uniform when the user E visually recognizes the first virtual image V1 as a virtual image display.
　例えば、第一虚像Ｖ１で全面白色の表示を行う時に、階調データＴＤによる補正がない場合、第一投影光Ｌ１の第一スクリーン３０上の近接部位と離間部位との輝度の比率が、例えば、１００：５０である場合、階調データＴＤは、近接部位ＮＰから離間部位ＦＰにかけて透過率が５０％から１００％（透過率が１００％とは、光を遮らないこと）に徐変するように設定する。この場合、全面白色の画像データと階調データＴＤを合成した階調補正画像データを第一虚像としてユーザＥが視認すると、近接部位ＮＰと離間部位ＦＰが、５０：５０の均一な輝度で表示される。 For example, when the first virtual image V1 is displayed in white on the entire surface and there is no correction by the gradation data TD, the ratio of the luminance of the first projected light L1 between the adjacent portion and the separated portion on the first screen 30 is, for example, , 100: 50, the gradation data TD gradually changes from 50% to 100% in transmittance from the neighboring site NP to the separated site FP (the transmittance of 100% means that light is not blocked). Set to. In this case, when the user E visually recognizes the gradation-corrected image data obtained by synthesizing the entire white image data and the gradation data TD as the first virtual image, the proximity part NP and the separation part FP are displayed with a uniform luminance of 50:50. Is done.
　なお、輝度の変化が、比例して変化しない場合もあるため、近接部位から離間部位にかけて比例した段階的変化の階調データＴＤになるとは限らない。第一スクリーン３０の輝度ムラに合わせて階調データＴＤの透過率を調整し、虚像表示の際に、全面で輝度ムラを抑えた表示となるように設定すればよい。 Note that since the change in luminance may not change proportionally, the gradation data TD is not necessarily proportional to the stepwise change from the proximity part to the separation part. The transmittance of the gradation data TD may be adjusted in accordance with the luminance unevenness of the first screen 30 and set so that display with reduced luminance unevenness is achieved on the entire surface when displaying a virtual image.
　なお、階調データＴＤは、ユーザＥによる操作により書き換え可能な状態で記憶されていてもよい。 Note that the gradation data TD may be stored in a rewritable state by an operation by the user E.
　駆動手段８３は、電動機６１を動作させたり、投影機２１に所定の表示を表示させる駆動回路であり、電動機６１及び投影機２１にそれぞれ設けられるものであるが、本実施形態では、説明を簡略化するために単一としてある。 The drive unit 83 is a drive circuit that operates the electric motor 61 or displays a predetermined display on the projector 21, and is provided in each of the electric motor 61 and the projector 21. In the present embodiment, the description is simplified. To be single.
　次に、制御手段８１の投影機２１における処理動作について説明する。 Next, the processing operation in the projector 21 of the control means 81 will be described.
　制御手段８１は、各種情報を入力し、所定の演算処理を行うことによって画像データを生成する。 The control means 81 inputs various information and generates image data by performing predetermined calculation processing.
　制御手段８１は、さらに、生成した画像データに階調データＴＤを重畳した階調補正画像データを投影する。よって、視認者は、輝度ムラを抑えた表示を視認することで、車両情報を明確に把握することが可能となる。 Further, the control means 81 projects gradation correction image data in which the gradation data TD is superimposed on the generated image data. Therefore, the viewer can clearly grasp the vehicle information by visually recognizing the display with reduced luminance unevenness.
　以上、ＨＵＤ装置１００は、表示光Ｎを投影する投影機２１と、投影機２１を制御する画像制御部８０と、表示光Ｎが投影されるとともに投影機２１に近接した近接部位と投影機２１から離れた離間部位とを有するように配置されるスクリーン３０と、を備え、スクリーン３０に投影された表示光Ｎが虚像表示として視認可能なＨＵＤ装置１００において、画像制御部８０はスクリーン３０の前記離間部位に対して前記近接部位の輝度が暗い表示光Ｎを投影機２１から投影させることによって、スクリーン３０を表示光Ｎに対して傾斜させて配置した場合でも表示輝度のムラを抑制することが可能なＨＵＤ装置１００を提供することができる。 As described above, the HUD device 100 includes the projector 21 that projects the display light N, the image control unit 80 that controls the projector 21, the proximity portion that is projected to the display light N and is close to the projector 21, and the projector 21. In the HUD device 100 in which the display light N projected on the screen 30 can be visually recognized as a virtual image display, the image control unit 80 includes the screen 30 disposed so as to have a separated portion away from the screen 30. By projecting the display light N having a low brightness in the proximity part relative to the separated part from the projector 21, unevenness in display brightness can be suppressed even when the screen 30 is inclined with respect to the display light N. A possible HUD device 100 can be provided.
　また、スクリーン３０は単一で、投影機２１に近接部位と投影機２１から離間部位とを有するように表示光Ｎに対して傾斜して配置される傾斜配置スクリーン３０を備え、画像制御部８０は、傾斜配置スクリーン３０の前記離間部位に対して前記近接部位の輝度が暗い前記表示光を前記投影機から投影させることによって、単一のスクリーン３０を表示光Ｎに対して傾斜させて配置した場合でも表示輝度のムラを抑制することが可能なＨＵＤ装置１００を提供することができる。 In addition, the screen 30 is single, and includes an inclined arrangement screen 30 that is inclined with respect to the display light N so that the projector 21 has a proximity part and a separation part from the projector 21, and the image control unit 80. Is arranged such that a single screen 30 is tilted with respect to the display light N by projecting the display light from the projector with the darkness of the proximity part to the separated part of the inclined arrangement screen 30. Even in such a case, it is possible to provide the HUD device 100 capable of suppressing display luminance unevenness.
　また、画像制御部８０は、スクリーン３０の前記離間部位から前記近接部位へ向かうに従って輝度が暗い表示光Ｎを投影機２１から投影させることによって、スクリーン３０を表示光Ｎに対して傾斜させて配置した場合でも表示輝度のムラを抑制することが可能なＨＵＤ装置１００を提供することができる。 Further, the image control unit 80 projects the display light N having a lower brightness from the projector 21 toward the adjacent part of the screen 30, thereby arranging the screen 30 to be inclined with respect to the display light N. Even in such a case, it is possible to provide the HUD device 100 capable of suppressing display luminance unevenness.
　以上が、本実施形態におけるＨＵＤ装置１００の説明であるが、本発明は上記実施形態及び図面によって限定されるものではない。これらに変更（構成要素の削除も含む）を加えることができるのはもちろんである。以下に変形例の一例を示す。 The above is the description of the HUD device 100 in the present embodiment, but the present invention is not limited to the embodiment and the drawings. Of course, changes (including deletion of components) can be added to these. An example of a modification is shown below.
　前記実施形態では、第一スクリーン３０の前記近接部位と前記離間部位の表示輝度のムラの抑制であったが、第一スクリーン３０と第二スクリーン４０との表示輝度のムラの抑制に採用しても良い。 In the embodiment, the display luminance unevenness of the proximity portion and the separation portion of the first screen 30 is suppressed, but the first screen 30 and the second screen 40 are employed to suppress display luminance unevenness. Also good.
　二つのスクリーン３０、４０は、第一スクリーン３０が、前記近接部位に相当する投影機２１に近接して配置した近接配置スクリーンであり、第二スクリーン４０が、前記離間部位である投影機２１から離れて配置した離間配置スクリーンであり、画像制御部８０は、前記離間配置スクリーンである第二スクリーン４０に対して前記近接配置スクリーンである第一スクリーン３０の輝度が暗い表示光Ｎを投影機２１から投影させるものである。 The two screens 30 and 40 are close arrangement screens in which the first screen 30 is arranged in proximity to the projector 21 corresponding to the proximity part, and the second screen 40 is from the projector 21 that is the separation part. The image control unit 80 supplies the display light N having a low luminance of the first screen 30 that is the proximity screen to the second screen 40 that is the separation screen. It is to project from.
　以上の構成によって、少なくとも二つ以上のスクリーン３０、４０を備えたＨＵＤ装置１００であっても、スクリーン３０、４０間で、表示輝度のムラを抑制することが可能なＨＵＤ装置１００を提供することができる。なお、スクリーン３０、４０の数は、二つに限定されない。 With the above configuration, even if the HUD device 100 includes at least two screens 30 and 40, the HUD device 100 capable of suppressing display luminance unevenness between the screens 30 and 40 is provided. Can do. The number of screens 30 and 40 is not limited to two.
　また、前記実施形態では、画像データに階調データＴＤを重畳して階調補正画像データを生成していたが、階調補正画像データは、階調データに基づいて、演算処理を行うことで、画像データのピクセル単位で画像データを補正し、階調補正画像データを生成してもよい。 In the embodiment, the gradation correction image data is generated by superimposing the gradation data TD on the image data. However, the gradation correction image data is obtained by performing arithmetic processing based on the gradation data. Alternatively, the tone correction image data may be generated by correcting the image data in pixel units of the image data.
　本発明は、画像を投影するスクリーンに近接部位と離間部位と有するヘッドアップディスプレイ装置に好適である。 The present invention is suitable for a head-up display device having a proximity part and a separation part on a screen for projecting an image.
　１０　　　筐体
　１０ａ　　開口部
　１０ｂ　　透光性カバー
　１５　　駆動手段
　２０　　　投影装置
　２１　　　投影機
　２２　　　フォールドミラー
　２３　　　結像位置調整ミラー
　３０　　　第一スクリーン（傾斜配置スクリーン）
　３０ａ　　切り欠き部
　４０　　　第二スクリーン
　５０　　　平面鏡
　６０　　　凹面鏡
　６１　　電動機
　８０　　　画像制御部
　８１　　制御手段
　８２　　記憶手段
　８３　　駆動手段
　９０　　車両ＥＣＵ
　９１　　エアコン
　９２　　オーディオ
　９３　　ナビゲーション装置
１００　　　ヘッドアップディスプレイ装置（ＨＵＤ装置）
２００　　　フロントガラス
２３１　　　第一反射面
２３２　　　第二反射面
　　Ｂ　　　多重信号ライン
　　Ｅ　　　ユーザ
　ＦＰ　　離間部位
　　Ｌ　　　投影光
　　Ｌ１　　第一投影光
　　Ｌ２　　第二投影光
　　Ｍ　　　表示画像
　　Ｍ１　　第一表示画像
　　Ｍ２　　第二表示画像
　　Ｎ　　　表示光
　　Ｎ１　　第一表示光
　　Ｎ２　　第二表示光
　　ＮＰ　　近接部位
　　Ｖ　　　虚像
　　Ｖ１　　第一虚像
　　Ｖ２　　第二虚像 DESCRIPTION OF SYMBOLS 10 Case 10a Opening part 10b Translucent cover 15 Drive means 20 Projection apparatus 21 Projector 22 Fold mirror 23 Imaging position adjustment mirror 30 First screen (tilt arrangement screen)
30a Notch 40 Second screen 50 Plane mirror 60 Concave mirror 61 Electric motor 80 Image control unit 81 Control unit 82 Storage unit 83 Drive unit 90 Vehicle ECU
91 Air conditioner 92 Audio 93 Navigation device 100 Head-up display device (HUD device)
200 windshield 231 first reflecting surface 232 second reflecting surface B multiple signal lines E user FP separation site L projected light L1 first projected light L2 second projected light M display image M1 first display image M2 second display image N display Light N1 First display light N2 Second display light NP Proximal part V Virtual image V1 First virtual image V2 Second virtual image

Claims (4)

  1. 表示光を投影する投影機と、前記投影機を制御する画像制御部と、前記表示光が投影されるとともに前記投影機に近接した近接部位と前記投影機から離れた離間部位とを有するように配置されるスクリーンと、を備え、前記スクリーンに投影された前記表示光が虚像表示として視認可能なヘッドアップディスプレイ装置において、前記画像制御部は前記スクリーンの前記離間部位に対して前記近接部位の輝度が暗い前記表示光を前記投影機から投影させることを特徴とするヘッドアップディスプレイ装置。 A projector that projects display light; an image control unit that controls the projector; a proximity part that projects the display light and is close to the projector; and a separation part that is separated from the projector. A head-up display device in which the display light projected on the screen is visible as a virtual image display, wherein the image control unit is configured to obtain a luminance of the proximity portion with respect to the separation portion of the screen. A head-up display device, wherein the display light is projected from the projector.
  2. 前記スクリーンは前記近接部位である前記投影機に近接して配置した近接配置スクリーンと、前記離間部位である前記投影機から離れて配置した離間配置スクリーンとを備え、前記画像制御部は前記離間配置スクリーンに対して前記近接配置スクリーンの輝度が暗い前記表示光を前記投影機から投影させることを特徴とする請求項１に記載のヘッドアップディスプレイ装置。 The screen includes a proximity screen disposed close to the projector as the proximity portion, and a separation screen disposed away from the projector as the separation portion, and the image control unit includes the separation placement The head-up display device according to claim 1, wherein the projector projects the display light having a dark brightness of the screen arranged close to the screen from the projector.
  3. 前記近接部位と前記離間部位とを有するように前記表示光に対して傾斜して配置される傾斜配置スクリーンを備え、前記画像制御部は前記傾斜配置スクリーンの前記離間部位に対して前記近接部位の輝度が暗い前記表示光を前記投影機から投影させることを特徴とする請求項１に記載のヘッドアップディスプレイ装置。 An inclined arrangement screen arranged to be inclined with respect to the display light so as to have the proximity portion and the separation portion, and the image control unit is configured to move the proximity portion to the separation portion of the inclination arrangement screen. The head-up display device according to claim 1, wherein the display light having a low luminance is projected from the projector.
  4. 前記画像制御部は前記スクリーンの前記離間部位から前記近接部位へ向かうに従って輝度が暗くなる前記表示光を前記投影機から投影させることを特徴とする請求項３に記載のヘッドアップディスプレイ装置。 4. The head-up display device according to claim 3, wherein the image control unit causes the projector to project the display light whose luminance decreases as it goes from the separated part to the close part of the screen.
PCT/JP2017/044469 2016-12-20 2017-12-12 Head-up display device WO2018116896A1 (en)

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