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WO2020203767A1 - Système d'affichage d'informations et système d'affichage d'informations de véhicule l'utilisant - Google Patents

Système d'affichage d'informations et système d'affichage d'informations de véhicule l'utilisant Download PDF

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Publication number
WO2020203767A1
WO2020203767A1 PCT/JP2020/014011 JP2020014011W WO2020203767A1 WO 2020203767 A1 WO2020203767 A1 WO 2020203767A1 JP 2020014011 W JP2020014011 W JP 2020014011W WO 2020203767 A1 WO2020203767 A1 WO 2020203767A1
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WO
WIPO (PCT)
Prior art keywords
light
information display
display system
vehicle
image
Prior art date
Application number
PCT/JP2020/014011
Other languages
English (en)
Japanese (ja)
Inventor
平田　浩二
藤田　浩司
杉山　寿紀
栄治 高木
Original Assignee
マクセル株式会社
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 マクセル株式会社 filed Critical マクセル株式会社
Publication of WO2020203767A1 publication Critical patent/WO2020203767A1/fr

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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—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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/02—Windows; Windscreens; Accessories therefor arranged at the vehicle front, e.g. structure of the glazing, mounting of the glazing
    • 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
    • B60K35/22—Display screens
    • 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
    • B60K35/28—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
    • 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
    • B60K35/50—Instruments characterised by their means of attachment to or integration in the vehicle
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/62—Translucent screens
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • 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
    • B60K35/80—Arrangements for controlling instruments
    • B60K35/81—Arrangements for controlling instruments for controlling displays

Definitions

  • the present invention is an information display capable of displaying an image in one direction to the inside or the outside of a store (space) by reflecting or transmitting through a transparent member that partitions a space such as a show window glass.
  • the information display system projects image light onto the windshield, rear glass, side glass, combiner, etc. of automobiles, trains, aircraft, etc. (hereinafter collectively referred to as "vehicles").
  • vehicle information display system capable of displaying in one direction with respect to the inside or the outside of the vehicle.
  • HUD Head-Up-Display
  • the video displayed on the video display device is concave. Many of them use an optical system including a mirror (action of a convex lens) to project to the driver's viewpoint.
  • AR Augmented-Reality
  • a liquid crystal display element liquid crystal display panel
  • a liquid crystal display element liquid crystal display panel
  • the resolution of the obtained projected image is insufficient, and a new problem that it is not suitable for displaying a high-resolution image displayed on a smartphone or the like has been clarified.
  • the place where the image device is placed is limited to the space between the steering wheel and the windshield.
  • the second problem is that there are restrictions on the structural requirements of the vehicle that can be installed, that is, the image light from the image device is reflected by the windshield in a direction that does not reach the driver's eyes and the system cannot be established. It became clear.
  • the conventional head-up display type information display device for a vehicle is not intended to display video information to the outside of the vehicle. Therefore, when the video information is to be displayed to the outside of the vehicle, a video display device such as a display is mounted inside the vehicle, and the video information is displayed through the glass of the vehicle. However, in that case, these video display devices obstruct the driver's field of vision, which is not preferable for safe driving.
  • Patent Document 1 and Patent Document 2 which are prior arts, a reflective screen or a transparent screen provided with a light diffusion layer containing binders and fine particles used in an information display device is disclosed, but video light is observed. No consideration is given to improving the efficiency of light utilization by efficiently delivering to people, and no teaching is given on the application in vehicles and the specific method, form, or configuration for that purpose.
  • the present invention can display high-resolution video information even on the glass surface of a show window instead of the conventional information display system or device, and efficiently delivers video light to an observer to improve light utilization efficiency.
  • an information display system capable of significantly reducing the power consumption of a system or device including a light source or an image projection device is provided.
  • the inside of the vehicle can be visually recognized by passengers including the driver through the shield glass including the windshield, rear glass, and side glass of the vehicle, regardless of the inclination angle. It is possible, but on the other hand, it is invisible from the outside of the vehicle, or it is visible from the outside of the vehicle, but on the other hand, it is invisible to the passengers inside the vehicle.
  • An object of the present invention is to provide a so-called vehicle information display system capable of unidirectional display.
  • an information display system for displaying an image in one direction with respect to the inside or the outside of the space through a transparent projected member installed in the space.
  • An image projection device that is arranged inside the space and modulates a light beam from a light source to generate and project image light, and a transparent device provided on the inner surface of a display area set as a part of the projected member.
  • the transparent sheet includes a sheet and an optical direction conversion panel that converts the direction of the image light from the image projection device toward the transparent sheet in the display area, and the transparent sheet absorbs a retardation plate and a specific polarization.
  • Information display that includes an absorption-type polarizing plate and a transparent diffusion sheet material having a light diffusing effect, and projects the video light whose direction has been changed by the light direction conversion panel toward the inside or the outside of the space. The system is provided.
  • a vehicle information display system that displays information inside or outside the vehicle by using a part of a transparent projected member constituting the vehicle as a display area.
  • An image projection device that projects the image light of the information provided inside the vehicle, and a transparent sheet provided on the inner surface of the display area set as a part of the projected member.
  • a light direction conversion panel for converting the direction of the image light from the image projection device toward the transparent sheet is provided, and the transparent sheet includes a retardation plate, an absorption type polarizing plate that absorbs a specific polarized light, and the like.
  • an information display system for a vehicle which includes a transparent diffusion sheet material having a light diffusing effect and projects the video light whose direction is changed by the light direction conversion panel toward the inside or the outside of the vehicle.
  • high-resolution video information can be displayed even on the glass surface of a show window, and the power consumption is significantly reduced by efficiently delivering the video light to the observer and improving the light utilization efficiency. It is possible to provide a new and highly usable information display system that can be reduced. Furthermore, using the information display system, it is visible to passengers including the driver inside the vehicle through the shield glass including the windshield, rear glass, and side glass of the vehicle, but on the other hand, A so-called unidirectional display that is invisible from the outside of the vehicle, or is visible from the outside of the vehicle, but is invisible to the passengers (passengers) inside the vehicle. It is possible to provide an information display system for vehicles.
  • HUD head-up display
  • HUD head-up display
  • FIG. 1 shows the overall configuration of an information display system according to an embodiment of the present invention.
  • a space is partitioned by a show window (also referred to as "wind glass") 220 which is a translucent member such as glass, and according to the information display system of this embodiment, such transparent
  • a show window also referred to as "wind glass”
  • FIG. 1 shows the inside of the show window 220 (inside the store) in the depth direction so that the outside (for example, the sidewalk) is in front of the show window 220.
  • the show window 220 which is a transparent member such as glass
  • a light source is provided to generate and project an image light to be displayed, which will be described in detail below.
  • the image projection device 48 is arranged, and the image light generated by the image projection device 48 is a transparent sheet (film) 51 attached to the light direction conversion panel 54 and the show window 220, which are also described in detail below.
  • the action of it is selectively displayed in one direction with respect to the inside or the outside. According to this, it is possible to display various information inside or outside the show window 220 by using the show window 220, and it is possible to remarkably improve the utilization efficiency of the show window.
  • FIG. 2 shows a more specific configuration of the above-mentioned information display system.
  • the image display element 52 constituting the image projection device 48 is, for example, relatively large in size exceeding 6 inches. It is composed of various liquid crystal display panels. Further, in order to perform correction at a level that does not cause a practical problem by distortion correction, the resolution of the panel is preferably 1280 ⁇ 720 dots or more.
  • the image projection device 48 includes the above-mentioned liquid crystal display panel 52 and a light source device 101 constituting the light source.
  • the light source device 101 is deployed above the above-mentioned liquid crystal display panel 52 together with the above-mentioned liquid crystal display panel 52. It is shown as a perspective view.
  • the liquid crystal display panel (element) 52 obtains a highly directional illumination luminous flux by a light source device 101, which is a backlight device, and modulates it according to an input video signal.
  • the image light is emitted toward the transparent sheet 51 provided on the surface of the wind glass 220.
  • the information display system includes a liquid crystal display panel 52 constituting the image projection device 48, an optical direction conversion panel 54 for controlling the directivity characteristic of the luminous flux emitted from the light source device 101, and if necessary.
  • a narrow angle diffuser plate (not shown) is provided accordingly.
  • polarizing plates are provided on both sides of the liquid crystal display panel 52, and video light having a specific polarization is emitted by modulating the light intensity with the video signal (see arrow 30 in FIG. 2). ..
  • a desired image is projected onto the window glass 220 via the optical direction conversion panel 54, and the inside or outside observer of the store (space) via the transparent sheet 51 provided on the surface thereof. Reflects or transmits toward the eye 8 (FIG. 2 shows an example of reflection).
  • Reference numeral 50 in the drawing indicates a protective cover provided on the surface of the above-mentioned optical direction conversion panel 54.
  • the image projection device 48 including the light source device 101 and the liquid crystal display panel 52 is described below.
  • the utilization efficiency of the light from the light source device 101 (see the arrow 30 in FIG. 2) is improved, and further, the transparency provided on the surface of the wind glass 220 by an optical component such as a lenticular lens described below. Directivity is given to the brightness of the image light transmitted or diffused through the sheet 51. According to this, the image light from the image projection device 48 efficiently reaches the observer inside the show window 220 (inside the store) or the observer outside (for example, the sidewalk). As a result, the power consumption of the image projection device 48 including the light source device 101 can be significantly reduced.
  • FIG. 3 shows a specific configuration of the light source device 101 described above. However, in FIG. 3, the light source device 101 of FIG. 2 is shown upside down.
  • the light source device 101 is formed of, for example, plastic or the like in the case shown in FIG. 2 or the like, and is configured by accommodating an LED element, a collimator, a synthetic diffusion block, a light guide, and the like, which will be described in detail later.
  • a liquid crystal display panel 52 constituting the image projection device 48 is attached to the upper surface thereof.
  • an LED (Light Emitting Diode) elements 14a and 14b which are semiconductor light sources, and an LED board 102 on which the control circuit thereof is mounted are attached to one side surface of the case of the light source device 101, and the outside of the LED board 102.
  • a heat sink 103 which is a member for cooling the heat generated by the LED element and the control circuit, is attached to the side surface (see FIG. 2).
  • the liquid crystal display panel frame attached to the upper surface of the case of the light source device 101 includes the liquid crystal display panel 52 attached to the frame, and further, FPC (Flexible Printed Circuits) electrically connected to the liquid crystal display panel.
  • Flexible wiring board 403 see FIG. 2 and the like are attached and configured. That is, the liquid crystal display panel 52, which is a liquid crystal display element, will be described in detail later, but together with the LED elements 14a and 14b, which are solid light sources, will be used as a control signal from a control circuit (not shown here) constituting the electronic device.
  • a display image is generated by modulating the intensity of transmitted light based on the above.
  • each of the LED collimators 15 is made of a translucent resin such as acrylic. Then, as shown in FIG. 4B, the LED collimator 15 has a conical convex outer peripheral surface 156 obtained by rotating a parabolic cross section, and at the top thereof, a convex portion (that is, a convex portion) is formed at the center thereof. , Convex lens surface) It has a recess 153 forming 157.
  • the central portion of the flat surface portion has a convex lens surface (or a concave lens surface recessed inward) 154 that protrudes outward.
  • the parabolic surface 156 forming the conical outer peripheral surface of the LED collimator 15 is set within an angle range within which the light emitted from the LED elements 14a and 14b in the peripheral direction can be totally reflected. Alternatively, a reflective surface is formed.
  • the LED elements 14a and 14b are respectively arranged at predetermined positions on the surface of the so-called LED substrate 102, which is the circuit board thereof.
  • the LED substrate 102 is arranged and fixed to the LED collimator 15 so that the LED element 14a or the LED element 14b on the surface thereof is located at the center of the recess 153, respectively.
  • the light emitted upward (to the right in the figure) from the central portion thereof is particularly emitted.
  • the two convex lens surfaces 157 and 154 that form the outer shape of the LED collimator 15 are focused to produce parallel light. Further, the light emitted from the other portion toward the peripheral direction is reflected by the paraboloid forming the conical outer peripheral surface of the LED collimator 15, and is similarly condensed into parallel light.
  • the LED collimator 15 in which a convex lens is formed in the central portion thereof and a radial surface is formed in the peripheral portion thereof, almost all the light generated by the LED element 14a or the LED element 14b is regarded as parallel light. It becomes possible to take out, and it becomes possible to improve the utilization efficiency of the generated light.
  • a polarization conversion element 21 described in detail below is provided on the light emitting side of the LED collimator 15.
  • the polarization conversion element 21 has a columnar translucent member having a parallelogram cross section (hereinafter, parallelogram column) and a columnar member having a triangular cross section (hereinafter, triangle).
  • a plurality of members are arranged in an array in parallel with the plane orthogonal to the optical axis of the parallel light from the LED collimator 15.
  • a polarizing beam splitter (hereinafter abbreviated as "PBS") film 211 and a reflective film 212 are alternately provided at the interface between the adjacent translucent members arranged in an array.
  • a 1 ⁇ / 2 phase plate 213 is provided on the exit surface from which the light incident on the polarization conversion element 21 and transmitted through the PBS film 211 is emitted.
  • a rectangular synthetic diffusion block 16 shown in FIG. 4A is provided on the exit surface of the polarization conversion element 21. That is, the light emitted from the LED element 14a or the LED element 14b becomes parallel light by the action of the LED collimator 15, enters the synthetic diffusion block 16, is diffused by the texture 161 on the exit side, and then leads as described below. It reaches the light body 17.
  • the light guide body 17 is a rod-shaped member having a substantially triangular cross section (see FIG. 4B) made of a translucent resin such as acrylic, and is clear from FIGS. 3 and 4.
  • the light guide body light reflecting surface) 172 and the light guide body light emitting portion (light guide body light emitting surface) 173 facing the liquid crystal display panel 52 of the liquid crystal display element via the second diffuser plate 18b are provided. ..
  • ⁇ n a natural number, for example, 1 to 130 in this example
  • ⁇ n is set to 43 degrees or less (however, 0 degrees or more).
  • the light guide body incident portion 171 is formed in a curved convex shape inclined toward the light source side. According to this, the parallel light from the exit surface of the synthetic diffusion block 16 is diffused through the first diffusion plate 18a and incident on the light guide body 17, and as is clear from FIG. 3, the light guide body The incident portion 171 slightly bends (deflects) upward to reach the light guide body light reflecting portion 172, where the light is reflected and reaches the liquid crystal display panel 52 provided on the upper emitting surface in the drawing.
  • the image projection device 48 described above further improves the light utilization efficiency and its uniform illumination characteristics, and at the same time, includes a modularized S-polarized wave light source device, which is compact and low cost. It will be possible to manufacture with.
  • the polarization conversion element 21 is attached after the LED collimator 15, but the present invention is not limited to this, and the same operation can be performed by providing the polarization conversion element 21 in the optical path leading to the liquid crystal display panel. It will be obvious to those skilled in the art that the effect will be obtained.
  • a large number of reflecting surfaces 172a and connecting surfaces 172b are alternately formed in a sawtooth shape on the light guide body light reflecting portion 172, and the illumination light beam is totally reflected on each reflecting surface 172a and is upwardly reflected.
  • the light emitting portion 173 of the light guide body is provided with a narrow angle diffuser plate to be incident on the optical direction conversion panel 54 that controls the directivity characteristics as a substantially parallel diffused light beam, and is incident on the liquid crystal display panel 52 from an oblique direction. ..
  • the light direction conversion panel 54 is provided between the light guide body emission surface 173 and the liquid crystal display panel 52, but it goes without saying that the same effect can be obtained even if the light direction conversion panel 54 is provided on the emission surface of the liquid crystal display panel 52. Let's go.
  • the light source device 101 is configured by attaching a light source unit in which a plurality of LEDs 201, which are light sources, are arranged to a light receiving unit 202 provided on the end surface of the light guide body 203, and the divergent luminous flux from the LEDs is regarded as substantially parallel light according to the lens shape of the light receiving unit.
  • the inside of the light guide body 203 is guided (direction parallel to the drawing), and the light beam direction changing means 204 is directed toward the liquid crystal display panel 52 arranged substantially parallel to the light source body. (Direction perpendicular to the front from the drawing) Exit.
  • the uniformity of the light flux incident on the liquid crystal display panel 52 is controlled.
  • FIG. 6 is a cross-sectional layout diagram for explaining the configuration of the light source of the present embodiment for polarization conversion in the light source device 101 including the light guide body 203 and the LED 201 described above and the operation thereof.
  • the light source device 101 is composed of, for example, a light guide body 203 provided with a light beam direction changing means 204 on the surface or inside formed of plastic or the like, an LED element 201 as a light source, a reflection sheet 205, a retardation plate 202, and the like.
  • a liquid crystal display panel 52 having a polarizing plate on a light source light incident surface and an image light emitting surface is attached to the upper surface of the image projection device 48.
  • a film or sheet-shaped reflective polarizing plate 49 is provided on the light source light incident surface of the liquid crystal display panel 52 corresponding to the light source device 101, and the polarization of one side of the natural light beam 210 emitted from the LED light source (for example).
  • the P wave) 212 is selectively reflected, reflected by the reflecting sheet 205 provided on one surface (lower part of the drawing) of the light guide body 203, and directed toward the liquid crystal display panel 52 again. Therefore, a retardation plate ( ⁇ / 4 plate) is provided between the reflective sheet 205 and the light guide 203 or between the light guide 203 and the reflective polarizing plate 49, and the light is reflected by the reflective sheet 205 and passed twice.
  • the image luminous flux whose light intensity is modulated by the image signal on the liquid crystal display panel 52 (arrow 213 in FIG. 6) is incident on the wind glass 220 at a large incident angle as shown in FIG. 1, so that the transparent sheet 51
  • the reflectance is increased, and good diffusion characteristics can be obtained for monitoring inside or outside the store (space).
  • FIG. 7 is a cross-sectional layout diagram for explaining the configuration and operation of the light source of the present embodiment for polarization conversion in the light source device 101 including the light guide body 203 and the LED 201, similarly to FIG.
  • the light source device 101 is composed of, for example, a light guide body 203 provided with a light beam direction changing means 204 on the surface or inside formed of plastic or the like, an LED element 201 as a light source, a reflection sheet 205, a retardation plate 202, and the like.
  • a liquid crystal display panel 52 having a polarizing plate on a light source light incident surface and an image light emitting surface is attached to the upper surface of the image projection device 48.
  • a film or sheet-shaped reflective polarizing plate 49 is provided on the light incident surface of the liquid crystal display panel 52 corresponding to the light source device 101, and one side of the natural light beam 210 emitted from the LED light source is polarized (for example, S wave).
  • the 211 is selectively reflected, reflected by the reflective sheet 205 provided on one surface of the light guide 203, and directed to the liquid crystal display panel 52 again.
  • a retardation plate ( ⁇ / 4 plate) is provided between the reflective sheet 205 and the light guide 203 or between the light guide 203 and the reflective polarizing plate 49, and the light is reflected by the reflective sheet 205 and reflected by passing it twice.
  • the light beam is converted from S-polarized light to P-polarized light to improve the utilization efficiency of the light source light as image light.
  • the image luminous flux whose light intensity is modulated by the image signal on the liquid crystal display panel 52 is transparent because the reflection on the surface is reduced even if it is incident on the wind glass 220 at a large incident angle.
  • the sheet 51 can efficiently diffuse the image light to the outside of the room.
  • a lenticular as shown in FIG. 8 is placed between the light source device 101 and the liquid crystal display panel 52 or on the surface of the liquid crystal display panel 52.
  • the lens 800 By providing the lens 800 and optimizing the lens shape, it is possible to control the emission characteristics in one direction (the image light in the X-axis direction in FIG. 8). Further, the image luminous flux from the image projection device 48 is emitted toward the window glass 220.
  • the operation of the lenticular lens 800 will be described.
  • the lenticular lens 800 can be emitted from the image projection device 48 described above and efficiently reflected or diffused on the transparent sheet 51 on the wind glass 220. That is, as shown in FIGS. 9A and 9B, for example, two lenticular lenses are combined with respect to the image light from the image projection device 48, and in the X-axis and Y-axis directions, which are the surfaces thereof.
  • the brightness (relative brightness) of the image light can be controlled according to the reflection angle (0 degrees in the vertical direction).
  • the image light is efficiently produced by increasing the brightness (relative brightness) of the light due to reflection or diffusion by making the brightness characteristic in the vertical direction steeper as compared with the conventional case. It is designed to reach the observer's eye 8 (see FIG. 2).
  • FIG. 10 shows an example of the characteristics of the lenticular lens used in this embodiment.
  • the characteristic in the X direction vertical direction
  • the peak in the light emission direction is at an angle of about 30 degrees upward from the vertical direction (0 degrees) and is symmetrical vertically. It shows the brightness characteristics.
  • the characteristics A and B in the figure further show an example of a characteristic in which the image light above the peak brightness is condensed at around 30 degrees to increase the brightness (relative brightness). Therefore, in these characteristics A and B, the brightness (relative brightness) of light is sharply reduced as compared with the characteristic O at an angle exceeding 30 degrees.
  • the image light from the image projection device 48 can be reflected or diffused by increasing (enhancing) its brightness in a specific direction via the transparent sheet 51 described below. it can.
  • This makes it possible to efficiently reach the eyes 8 of the observer outdoors or indoors with the image light from the image projection device 48. According to this, even if the intensity (luminance) of the image light from the image projection device 48 is reduced, the observer can accurately recognize the image and obtain information. In other words, by further reducing the output of the image projection device 48, it is possible to realize an information display system with lower power consumption.
  • the transparent sheet 51 is composed of a polarizing plate 57 that transmits S waves, a transparent diffusion sheet material 55, and a retardation plate 58.
  • the transparent sheet 51 is a film stretched while melting a thermoplastic polymer in which nanoparticulate zirconium or nanoparticulate diamond having a large refractive index is dispersed, for example, "Kaleidoscreen" manufactured by JXTG Energy Co., Ltd. is used (the above-mentioned patent).
  • the image light from the image projection device 48 is S-polarized, it scatters inside the above-mentioned transparent diffusion sheet material 55 and is emitted toward the observer in a state where the reflectance is high when it is obliquely incident.
  • a part of the image light is dispersed in the polarization direction due to scattering, diffuses and transmits through the transparent diffusion sheet material 55, and is emitted toward the window glass 220. Since the difference in refractive index is small on the incident surface of the wind glass 220, the level of the double image generated by the reflected light is low.
  • the intensity of the reflected light generated on the exit surface (the surface in contact with the outside world) of the wind glass 220 has a large reflectance because most of the S polarization component is present.
  • the image light reflected on this surface passes through the polarizing plate 57 again after being reflected and is absorbed, so that it does not return to the observer side. Therefore, the light intensity of the double image generated by the reflected image of the wind glass 220 can be significantly reduced, and the image quality is greatly improved.
  • the same effect can be obtained by attaching the above-mentioned transparent sheet 51 to the combiner instead of the wind glass 220 as the image reflecting surface.
  • the transparent sheet 51 described above allows the P-polarized sunlight component that has passed through the windglass 220 under predetermined conditions in the daytime (in the combiner method, the combiner also passes after that) to be provided in the information display system and the light direction conversion provided on the upper surface thereof.
  • the transparent sheet 51 By absorbing the light in front of the panel 54 and the protective cover 50, it is possible to prevent the light from returning to the liquid crystal display panel and the polarizing plate.
  • FIG. 12 shows the configuration of the transparent sheet 51'that diffuses the image luminous flux to the outside of the vehicle or the outside of the vehicle.
  • a polarizing plate 57 that transmits P waves and a retardation plate 58 are provided on the incident surface of the image light flux of the transparent diffusion sheet material 55, and the image light flux reflected by the transparent diffusion sheet material 55 is indoors (a space in which an information display device is installed). ) To prevent it from returning. As a result, the observer does not have any trouble with the image projected on the window glass 220'.
  • the optimum phase difference of the retardation plate 58 provided between the polarizing plate 57 and the transparent diffusion sheet material 55 should be selected according to the diffusion characteristics of the transparent diffusion sheet. If the diffusion angle is large, ⁇ / It is better to be close to 4, and when the diffusion angle is small, better conversion characteristics can be obtained by combining with a ⁇ / 8 plate or the like.
  • the reflectance of the image light beam can be increased, and at the same time, the wind glass 220. It was confirmed that the intensity of the double image generated by the reflected image of the above can be significantly reduced, that is, the same effect as the above-mentioned technique can be obtained.
  • transparent diffusion sheet material 55 for example, PDLC (Polymer Dispersed Liquid Crystal) of Suntech Display Co., Ltd. is used, and in the image display state, the image light is dispersed without applying a voltage, and the image is not displayed. Then, it is advisable to substitute a transparent sheet by applying a voltage to make it transparent.
  • PDLC Polymer Dispersed Liquid Crystal
  • FIG. 13 is a schematic explanatory view for explaining the principle of the optical direction conversion panel 54 provided on the upper surface of the image projection device 48 described above, which constitutes a part of the information display system of the present embodiment.
  • the luminous flux from the light guide body 17 of the light source device 101 described above is incident from the incident surface (lower surface in the figure) of the light direction conversion panel 54, and is due to the lens action of the linear Fresnel lens provided on the exit surface (upper surface in the figure).
  • the light flux is refracted in the desired direction ⁇ 3.
  • the desired direction ⁇ 3 is uniquely derived from Snell's law by the angle of incidence ⁇ 2 of the luminous flux on the Fresnel lens, the Fresnel angle ⁇ 0 of the Fresnel lens, and the refractive index n of the base material.
  • the substantially parallel light flux from the light guide can be given directivity in a desired direction. That is, the image light, which is the light from the liquid crystal display panel 52 constituting the image projection device 48, is provided on the window glass 220 described below without being visually recognized by an observer inside or outside the store (space). Head to the transparent sheet 51.
  • the light direction conversion panel 54 does not allow the image light from the image projection device 48 (see FIG. 2 or 3) to be directly recognized from the space, and therefore, the observer in the store. Only the reflected image by the reflected light will be monitored by the observer without getting in the way.
  • the connecting surface 88 of the Fresnel lens By providing a light-absorbing paint or pigment on the connecting surface 88 of the Fresnel lens, the generation of light other than the luminous flux traveling in a desired direction is suppressed. As a result, unnecessary light is not mixed with the image light reflected by the wind glass 220, so that the imaging performance is not impaired.
  • FIG. 14 is a cross-sectional view showing a schematic configuration of the protective cover 50 provided on the upper surface of the optical direction conversion panel 54.
  • a black stripe 59 is provided on a part of the substantially transparent base material 56 on the light emitting side.
  • a paint containing carbon black as the black paint for the black stripe 59.
  • the antireflection film has a property of reflecting near-infrared light and infrared light.
  • a film or film 50a that absorbs or reflects the P wave component of the solar luminous flux is formed or adhered.
  • the P wave component of sunlight does not enter the image projection device 48, the reliability regarding light resistance and heat resistance is significantly improved.
  • it since it also has the characteristics of a filter that selectively transmits the S-polarized image light output from the image projection device 48, the contrast performance of the obtained image is significantly improved.
  • the film or film 50a is used to absorb or reflect the P wave component of the solar luminous flux provided on the light incident side surface of the protective cover 50 provided on the light emitting side of the image projection device 48.
  • a wave plate 50b such as a ⁇ / 4 plate, a ⁇ / 8 plate, or a ⁇ / 16 plate is arranged between the materials 56.
  • the wave plate 50b it is preferable to align the polarization directions of the luminous flux in a specific direction, set the image light as the optimum polarization angle, and shift the polarization direction of the polarized sunglasses and the desired amount of polarization axis.
  • the polarization axis when the polarization axis is rotated to bring it closer to circularly polarized light, the polarization axis of the image light from the information display system rotates from S-polarized light. For this reason, the reflectance of the wind glass 220 is lowered and the brightness of the image is lowered. Therefore, it is preferable to balance the two.
  • various information can be displayed inside or outside by using the show window 220, and the utilization efficiency of the show window can be remarkably improved.
  • an information display system that can improve the utilization efficiency of the light emitted from the light source and significantly reduce power consumption is realized.
  • a plurality of relatively inexpensive liquid crystal display panels are combined as an image display element 52 constituting the image projection device 48 together with the light source device 101, and the joint portion is continuously integrated. It is also possible to adopt a large-sized liquid crystal display panel 52. In this case, the power consumption is also significantly reduced by reflecting and diffusing the light flux from the light source device 101 described above in one direction toward the transparent sheet 51 provided on the wind glass 220 by the transparent sheet 51. However, it is possible to display a larger image information.
  • the information display system is applied to a store which is a space partitioned by a show window which is a transparent member such as glass, and the show window 220 is used in one direction with respect to the inside or the outside.
  • the example to be displayed has been described, the present invention is not limited to such an example. That is, in the information display system of the present invention, if a predetermined space is partitioned by using a transparent member such as glass, the information display system displays in one direction with respect to the inside or the outside by using the transparent member that partitions the space. This is possible, and other examples of information display systems will be described below.
  • ⁇ Vehicle information display system> 15 and 16 show a vehicle information display system in which the information display system of the above-described embodiment is applied to a vehicle such as an automobile, a train, or an aircraft, and in particular, when the information display system is mounted on a commercial vehicle such as a bus or a train. It is an external view of.
  • a windshield 6 As a translucent projected member for projecting and displaying image light, a rear glass 6'(not shown), a side glass 6 "etc.
  • shield glass There is also “shield glass”).
  • the windshield 6 has a different inclination angle with respect to the vehicle body depending on the type of vehicle.
  • the inventors also investigated this radius of curvature in order to realize an optimum virtual image optical system.
  • the radius of curvature Rh in the horizontal direction horizontal to the ground plane of the vehicle and the radius of curvature Rv in the direction perpendicular to the horizontal axis have the following relationship and are in the horizontal direction. It was found that the radius of curvature Rh of is close to a horizontal surface in many cases. Rh> Rv
  • This vehicle information display system has a windshield 6, a rear glass 6', and / or a side glass 6 "as a projecting member that is a translucent member that partitions the space inside the vehicle and constitutes a part of the vehicle. It is used to display video information in one direction inside or outside the vehicle, and when the driver drives his own vehicle, the driver and passengers in the vehicle are made to monitor the video information, while the other As a result, the driver and passengers appropriately display necessary information in a display area such as the windshield 6 in the vehicle, and the video information can be displayed to the outside of the vehicle. It can be monitored, but on the other hand, the information cannot be monitored from the outside of the vehicle, or to the outside of the vehicle via the rear glass 6'or the side glass 6'(which may include the windshield 6). On the other hand, video information can be displayed, and this displayed information can be monitored from the outside, but it cannot be monitored from inside the vehicle, without preventing the driver or passengers from monitoring the outside landscape. , Does not interfere with driving.
  • Natural light such as sunlight is as shown in FIG. Not only light in a wide wavelength range from ultraviolet rays to infrared rays, but also two types of polarization directions (hereinafter referred to as S-polarized light and P-polarized light), which are light in the vibration direction perpendicular to the traveling direction of light and light in the horizontal direction. It exists in a state of being mixed with the light of (described). In particular, in a region where the angle of incidence on the windshield 6 exceeds 50 degrees, the reflectance on the glass surface differs depending on the S-polarized light, the P-polarized light, and the incident angle, as shown in FIG.
  • the sunlight entering the information display device is included.
  • it is particularly effective to reduce the P wave component, and in addition, it should be emitted from the information display device and reflected in the vehicle to be recognized by the driver or passenger who is the observer. It was confirmed that it is effective to use the S-wave component as the image light.
  • FIG. 19 shows an external landscape in which the driver applies the information display system according to the present embodiment to the vehicle and monitors the video information through the windshield 6 which is a transparent projected member forming a part of the vehicle.
  • the overall configuration of the vehicle information display system displayed in a part of is shown.
  • the windshield 6 is divided into a plurality of regions, and the image light from the image projection device 48 is diffused and reflected by the windshield 6 in a part of the regions (in this example, the upper part of the windshield 6).
  • the reflected image is directly monitored by the driver and passengers in one direction.
  • the driver and passengers can appropriately display and monitor necessary information in the display area of the windshield 6, but on the other hand, the information cannot be visually recognized from the outside of the vehicle. ..
  • the image projection device 48 details, for example, high-resolution map information (image of a large-scale high-resolution image display device) from a smartphone 300 or the like below.
  • the light direction conversion panel 54 and the protective cover 50 (hereinafter, the light source device 101, which is a backlight device constituting the information display system of this embodiment, the image projection device 48, the light direction conversion panel 54, and the protective cover). 50 is collectively referred to as an “information display device” 100), which is projected onto the inner surface of the windshield 6 and is viewed by a monitor (driver) via a transparent sheet 51 provided on the surface of the windshield 6. An image is displayed on the windshield 6 by reflecting the light toward the eye 8.
  • the smartphone 300 which is a high-performance mobile terminal device equipped with a navigation function that provides map information and the like
  • the display screen from the smartphone 300 is a wired connection terminal. It is possible to display the video by inputting it via Bluetooth (registered trademark) or wirelessly such as Wifi (registered trademark), so that the driver can display the vehicle information display system. It can be used to monitor high-resolution video information.
  • the smartphone is a CPU (Central Processing Unit), work memory, and various solid-state memories such as RAM and ROM having functions as information storage / storage means, similar to the above-mentioned image projection device 48.
  • the control unit is provided with a control unit configured by the above, and has a function of generating a necessary image and displaying it on the display device (liquid crystal display).
  • the image display element 52 constituting the image projection device 48 of the information display device 100 is composed of, for example, a relatively large liquid crystal display panel having a screen size of more than 6 inches.
  • a relatively large liquid crystal display panel having a screen size of more than 6 inches.
  • a panel resolution of 1280 x 720 dots or more is required to perform correction at a level that does not cause a problem in practical use by this distortion correction.
  • the image projection device 48 includes the above-mentioned liquid crystal display panel 52 and a light source device 101 constituting the light source.
  • the light source device 101 is shown above the liquid crystal display panel 52. ..
  • the liquid crystal display panel (element) 52 obtains a highly directional illumination luminous flux by a light source device 101 which is a backlight device, and modulates the image light according to an input image signal. Is emitted toward the transparent sheet 51 provided on the windshield 6.
  • the vehicle information display system includes a liquid crystal display panel 52 constituting the image projection device 48, an optical direction conversion panel 54 for controlling the directional characteristic of the luminous flux 30 emitted from the light source device 101, and an optical direction conversion panel 54. , It is configured to be provided with a narrow angle diffuser (not shown) as needed.
  • polarizing plates are provided on both sides of the liquid crystal display panel 52, and video light having a specific polarization is emitted by modulating the light intensity with the video signal.
  • a high-resolution image an image of a large-scale high-resolution image display device
  • a smartphone 300 or the like is projected toward the windshield 6 via the optical direction conversion panel 54, and a transparent sheet 51 provided on the surface thereof. It reflects toward the eyes 8 of the observer (driver) through.
  • the image projection device 48 constituting the information display device 100 includes a light source device 101, a liquid crystal display panel 52, and the like, and includes the light source device 101 of the image projection device 48.
  • the operation has already been shown as Example 1 and Example 2 of the image display device in FIGS. 3 to 7 above, and although not described in detail here, almost all the light generated by the LED is taken out as parallel light. It is possible to improve the utilization efficiency of the generated light, further improve its uniform lighting characteristics, and at the same time, it is manufactured in a small size and at low cost including a modularized S-polarized light source device. It becomes possible to do.
  • the image light from the image projection device 48 can efficiently reach the eyes 8 of the observer outdoors or indoors. This makes it possible to realize a vehicle information display system with low power consumption in which the output of the image projection device 48 is further reduced.
  • the optical direction conversion panel 54 provided on the lower surface of the image projection device 48 described above is the same as that already described in FIG. 13 and the description related thereto, and its configuration and operation will not be described in detail here.
  • the image light which is the light from the liquid crystal display panel 52 constituting the image projection device 48 of the information display device 100, is transparent provided on the front glass 6 without being visually recognized by the driver or passengers inside the vehicle. The image light is directed to the seat 51, and then the image light is reflected and diffused in one direction by the transparent sheet 51, and the reflected image is visually recognized by the driver.
  • the image light from the image projection device 48 itself is not directly visible from the inside of the vehicle, and therefore does not interfere with driving, and is due to the reflected light. Only the reflected image will be monitored by the driver and passengers.
  • the protective cover 50 which is arranged in contact with the ceiling surface of the vehicle and is provided on the upper surface of the above-mentioned optical direction conversion panel 54 is the same as that already described in FIG. 14 and the related description above, and here, the same. Although the configuration and operation will not be described in detail, the vehicle information display system will reduce the hindrance caused by the reflection of external light, especially when the driver drives the vehicle.
  • the transparent sheet 51 is composed of a polarizing plate 57 that transmits S waves and a transparent diffuse sheet material 55, and when no image is displayed, the transparent sheet 51 is composed of a polarizing plate 57 that transmits S waves. It is transparent and does not prevent the driver from monitoring the scenery of the outside world (outside the vehicle). On the other hand, when displaying the image, the image light is diffused and reflected so that the driver and passengers can see the image information. It is possible to realize the display of directionality.
  • the haze degree (HAZE) defined by the ratio of the diffusion transmittance and the parallel light transmittance of the transparent sheet 51 is 10% or less, there is no practical problem, but preferably 4% or less.
  • the HAZE of wind glass for automobiles is 2% or less.
  • the transparent diffusion sheet material 55 constituting the transparent sheet 51 described above is in a state of high reflectance when obliquely incident (FIG. FIG. It scatters inside (see 11) and emits toward the observer.
  • a part of the image light is dispersed in the polarization direction due to scattering, diffuses and transmits through the transparent diffusion sheet material 55, and is emitted toward the windshield 6. Since the difference in refractive index is small on the incident surface of the windshield 6, the level of the double image generated by the reflected light is low.
  • the intensity of the reflected light generated on the exit surface (the surface in contact with the outside world) of the windshield 6 has a large reflectance because most of the S polarization component is present.
  • the image light reflected by this surface passes through the polarizing plate 57 (see FIG. 11) and is absorbed, so that it does not return to the observer side. Therefore, the double image generated by the reflected image of the windshield 6 is not generated, so that the image quality is greatly improved.
  • the same effect can be obtained by attaching the above-mentioned transparent sheet 51 to the combiner instead of the windshield 6 as the image reflecting surface.
  • the P-polarized solar component that has passed through the front glass 6 under predetermined conditions in the daytime (in the combiner method, the combiner is also subsequently combined). Passage), the image projection device 48 including the light source device 101 and the liquid crystal display panel 52, the information display device 100 including the light direction conversion panel 54, and the light direction conversion panel 54 and the protective cover provided on the upper surface thereof.
  • the image projection device 48 including the light source device 101 and the liquid crystal display panel 52
  • the information display device 100 including the light direction conversion panel 54
  • the light direction conversion panel 54 and the protective cover provided on the upper surface thereof.
  • a reflective transparent sheet 51 is used as the unidirectional transparent sheet 51 provided on the windshield 6, but instead of this, the transmissive transparent sheet 51 described in FIG. 12 above is used.
  • the transparent sheet 51' it is possible to diffuse the image luminous flux in one direction, that is, to the outside of the vehicle.
  • a polarizing plate and a retardation plate that transmit P waves are provided on the image luminous flux incident surface of the transparent diffusion sheet material 55 (see FIG. 12) constituting the transparent sheet 51'and reflected by the transparent diffusion sheet material 55. It prevents the image luminous flux from returning to the room (the space where the information display device 100 is installed). As a result, the driver does not have any trouble in driving due to the image projected on the windshield 6.
  • the optimum phase difference of the retardation plate 58 provided between the polarizing plate 57 and the transparent diffusion sheet material 55 should be selected according to the diffusion characteristics of the transparent diffusion sheet. If the diffusion angle is large, ⁇ / 4 It is better to be close to, and when the diffusion angle is small, better conversion characteristics can be obtained by combining with a ⁇ / 8 plate or the like.
  • the image of the upper region of the windshield 6 which is a transparent member for partitioning the interior space of the vehicle.
  • a large high-resolution image projection device 48 is provided at a position corresponding to the display area (ceiling surface in FIG. 19), and the displayed image is reflected by the windshield so that the reflected image can be directly transmitted to the driver or passengers. It becomes possible to monitor.
  • an image is displayed by the information display device 100 of the present embodiment including the image projection device 48, the optical direction conversion panel 54, etc. by using the windshield 6 including the windshield 6 and the side glass 6 ”that partition the vehicle space.
  • the information display system for vehicles has been described, the present invention is not limited to this, and further, an image is displayed by using a windshield, or a head-up display (HUD) type information display device (hereinafter referred to as “HUD”). It is also possible to mount and use a "HUD device”) at the same time, and an example thereof will be described below.
  • HUD head-up display
  • FIG. 21 shows an example in which a vehicle information display system is mounted on an ordinary passenger car instead of the above-mentioned large vehicle.
  • a part of the windshield 6 (upper part of the steering wheel 43) and An image is displayed in one direction toward the inside or outside of the display vehicle by the information display device 100 including the image projection device 48 and the optical direction conversion panel 54 described above on a part of the side glass 6 ”.
  • the HUD device a known general device can be adopted, but here, as an example thereof, the outline will be described below.
  • FIG. 22 is a schematic configuration diagram showing the HUD device 700 including its peripheral device configuration.
  • the projected member Various information reflected by 6 (inner surface of the windshield) is diffusely reflected inside the vehicle by the transparent sheet 51 provided on the windshield 6 and displayed as a real image.
  • the above-mentioned HUD device 700 includes a video display device 704 that generates video light for displaying information and a light source device 710 that supplies light to the video display device 704.
  • a video display device 704 that generates video light for displaying information
  • a light source device 710 that supplies light to the video display device 704.
  • it can be controlled in one direction by providing a lenticular lens between the light source device 710 and the image display device 704 described above and optimizing the lens shape.
  • the image luminous flux from the HUD device 700 is emitted from the opening (not shown) toward the windshield 6.
  • the HUD device 700 is provided with a control device 740 that controls the backlight.
  • the optical components including the image display device 704 and the backlight reflect the display image of the image display device 704 on the transparent sheet 51 attached to the windshield 6 and simultaneously diffuse the display image toward the driver's line of sight 8.
  • the image display device 704 includes, for example, an LCD (Liquid Crystal Display) having a backlight.
  • the illustrated control device 740 constituting the HUD device has the speed limit and the number of lanes of the road corresponding to the current position where the own vehicle is traveling from the navigation system 761, and the movement schedule of the own vehicle set in the navigation system 761.
  • Various information such as a route is acquired as foreground information (that is, information displayed in front of the own vehicle by the above-mentioned virtual image).
  • the driving support ECU 762 is a control device for realizing driving support control by controlling the drive system and the control system according to the obstacle detected as a result of the monitoring by the peripheral monitoring device 763.
  • driving support control includes well-known techniques such as cruise control, adaptive cruise control, pre-crash safety, and lane keeping assist.
  • the illustrated peripheral monitoring device 763 is a device that monitors the situation around the own vehicle, and as an example, a camera that detects an object existing around the own vehicle based on an image taken around the own vehicle, or It is an exploration device that detects objects existing around the own vehicle based on the result of transmitting and receiving exploration waves.
  • the control device 740 of the HUD device described above acquires information from such a driving support ECU 762 (for example, the distance to the preceding vehicle, the direction of the preceding vehicle, the position where an obstacle or a sign exists, etc.) as foreground information. Further, an ignition (IG) signal and own vehicle state information are input to the control device 740.
  • the own vehicle status information is information acquired as vehicle information and does not require high-resolution display, for example, the remaining amount of fuel of the internal combustion engine, the temperature of the cooling water, etc. are predetermined. It contains warning information indicating that the abnormal condition has occurred.
  • the operation result of the direction indicator, the traveling speed of the own vehicle, and the shift position information are also included.
  • the control device 740 described above is activated when an ignition signal is input.
  • the projected member 6 may be a member to which information is projected, and may be a combiner in addition to the windshield described above, and forms a real image in front of the own vehicle in the driver's line of sight 8. Anything that can be visually recognized by the driver will do.
  • FIG. 23 shows an example of arrangement in the cockpit of the automobile in which the information display device 100 and / or the HUD device 700 of this embodiment including the above-mentioned image projection device 48 and the transparent sheet 51 is arranged.
  • FIG. 23A shows a system corresponding to an automobile having a steering wheel arranged on the left side
  • FIG. 23B shows a system corresponding to an automobile having a steering wheel arranged on the right side.
  • the image information is reflected by the windshield 6 and displayed by using the HUD device 700 shown above, and corresponds to the image display area (1b) (corresponding to the area where the transparent sheet 51 is attached).
  • the information display device 100 is used to reflect the image information on the windshield 6 and have the driver monitor the reflected image.
  • the image display area (1b) is on the upper part of the windshield 6, and the HUD image display area (1a) is outside the vehicle for the driver, for example, in the range where the bonnet of the own vehicle is monitored. It would be preferable to set it in a range or area that does not interfere with the monitoring of the landscape.
  • the above-mentioned information display device 100 is on the ceiling surface of the vehicle, while the HUD device 700 is inside the dashboard 47 between the windshield 6 and the steering wheel 43, from the windshield 6 to the HUD device 700.
  • the information display device 100 displays a large-sized high-resolution image on the external landscape monitored through the windshield 6, that is, a part of the windshield 6.
  • the driver or passenger can monitor the reflected image, or the information from the HUD device 700 can be displayed as needed.
  • the system can be provided.
  • the image display area (1b) in which the transparent sheet 51 is attached to the window glass 6 reflects the image light from the information display device 100 and causes the driver to monitor it.
  • the augmented reality can be realized in a pseudo manner by superimposing the image display area (1b) on the landscape monitored by the driver while driving, for example.
  • the image projected at this time is preferably set in a range or area that does not interfere with the monitoring of the scenery outside the vehicle for the driver.
  • the rearview mirror 71 shown in FIG. 23 is provided with a camera 72 for monitoring the driver's condition and the inside of the vehicle.
  • the image light from the information display device 100 described above is adapted to the height of the driver's eyes. It would also be possible to control the emission direction of.
  • ⁇ Modification example of vehicle information display system external display>
  • the vehicle information display system according to the present invention is not limited to the above-described embodiment, and it is also possible to display video information to the outside of the vehicle. That is, in the same manner as above, the video information is displayed to the inside or the outside of the vehicle not only through the windshield 6 described above but also through the rear glass 6'and the side glass 6'which are shield glasses. It is possible to do.
  • the system of this embodiment it is possible to display information indicating the state of the vehicle such as "empty vehicle” on a part of the windshield 6 of the taxi, and further on the rear glass 6'or the side glass 6 ".
  • information such as other information promotion / advertisement to the outside of the vehicle.
  • information such as the route or destination can be displayed on the windshield.
  • display the information on the rear glass, the side glass, etc. in one direction from the outside of the vehicle. The configuration of the information display system for the vehicle when the information is displayed to the outside will be described below.
  • FIG. 24 shows a system in which necessary image information is displayed and monitored in one direction with high resolution from the outside of the vehicle via a windshield 6 as a projected member, more specifically,
  • a taxi such as "empty car”
  • the image light from the information display device 100' is diffused by the windshield 6 as a transparent sheet 51'(see FIG. 12) provided on the surface of the windshield 6.
  • the image is transparently displayed outside the vehicle as shown by an arrow in FIG. 12, and can be monitored by, for example, a pedestrian.
  • the driver and passengers can display the necessary information on the windshield 6 relatively large with respect to the outside of the vehicle, but the display may interfere with the monitoring of the scenery outside the vehicle to be monitored from inside the vehicle. It does not interfere with the driver's driving.
  • an antireflection coating having an increased reflectance of a specific polarized light is provided on the back surface of the above-mentioned polarizing plate to reflect the image light beam.
  • the rate can be increased, and at the same time, the intensity of the double image generated by the reflected image of the front glass 6 can be significantly reduced. That is, it was confirmed that the same effect as the above-mentioned technique can be obtained.
  • PDLC Polymer Dispersed Liquid Crystal
  • Suntech Display Co., Ltd. is used to disperse the image light without applying a voltage in the image display state.
  • a voltage may be applied to make the transparent state, which may be used as a substitute for the transparent sheet.
  • the transparent sheet 51' is composed of a polarizing plate 57 that transmits S waves and a transparent diffusion sheet material 55.
  • nanoparticle zirconium and nanoparticle diamond having a large refractive index are dispersed.
  • a film stretched while melting the molten thermoplastic polymer for example, "Kaleidoscreen” manufactured by JXTG Energy Co., Ltd. (see Patent Document 2), it is transparent when no image is displayed, while it is transparent.
  • the image light is diffused and transmitted.
  • the video information can be displayed to the outside without causing the driver or passengers to visually recognize the video information and hindering the monitoring of the scenery outside the vehicle.
  • the action of the transparent sheet 51'in this case will be described.
  • the transparent sheet 51' is composed of a polarizing plate 57, a transparent diffusion sheet material 55, and a retardation plate 58.
  • a polarizing plate 57 By transmitting P-polarized light, the illuminance of sunlight is reduced.
  • a part of sunlight is absorbed by the polarizing plate by rotating the polarization axis of P-polarized light by the retardation plate 58.
  • the damage that the image projection device 48 receives due to sunlight can be dispersed.
  • the image light diffused outside the vehicle by the action of the transparent diffusion sheet material 55 is reflected by the rear glass 6'and returns to the inside of the vehicle.
  • This light obstructs the driver's field of vision and hinders driving. Therefore, in this embodiment, the retardation plate 58 is arranged between the rear glass 6'and the polarizing plate 57, and the reflected light is absorbed by the polarizing plate so that the information by the image light can be visually recognized by the driver and passengers in the vehicle. It is displayed in one direction toward the outside of the vehicle. At that time, the information obtained by the video light does not interfere with the driver or passengers in the vehicle from monitoring the scenery outside the vehicle and does not interfere with the driving.
  • haze degree defined by the ratio of the diffusion transmittance and the parallel light transmittance of the transparent sheet 51 described above is 10% or less, there is no practical problem, but preferably 4% or less.
  • the HAZE of wind glass for automobiles is 2% or less.
  • the display of information to the outside of the vehicle using the windshield 6 and a part of the shield glass such as the rear glass and the side glass is particularly the above-mentioned "empty vehicle” indicating the empty state of the taxi. It would be suitable for displaying this information to pedestrians on the street.
  • the vehicle information display system according to the present embodiment not only displays video information in one direction on the windshield, but also in a large vehicle such as a bus or a train. Also, various information including advertisements, advertisements, notifications, etc. can be obtained by using the projected members such as the rear glass 6'and the side glass 6'(see FIGS. 15 and 16) which are the shield glasses constituting the vehicle. It is also possible to display. The following describes the configuration of the vehicle information display system and its operation when displaying information to the outside of the vehicle.
  • FIG. 25 shows information as a projected member constituting a part of the vehicle, for example, displaying information to a pedestrian or the like outside the vehicle through the rear glass 6'constituting the vehicle.
  • the driver and passengers can monitor the necessary information on the windshield 6 described above (see FIG. 21 and the like), but at the same time, the information can be displayed outside the vehicle by the rear glass 6'.
  • the driver and passengers cannot monitor the information displayed to the outside, and therefore do not obstruct the driver's field of vision. That is, the display of information outside the vehicle does not prevent the driver or passenger inside the vehicle from monitoring the outside landscape.
  • Video information is displayed by projecting toward 1e).
  • the transparent sheet 51'shown in FIG. 12 described above is provided in the image display area of the rear glass 6'.
  • the projected member that displays video information in one direction toward the outside of the vehicle is not limited to the windshield 6 and the rear glass 6'described above, and other, for example, the side glass 6 that constitutes the side surface of the vehicle. It is also possible to use (see FIGS. 15, 16, 21, etc.), in which case, although not shown here, a member in the vicinity of the side glass 6 "(eg, an adjacent ceiling surface or window frame). It is natural that the information display device 100'is arranged in a part or the like), and the transparent sheet 51'shown in FIG. 12 is provided in the image display area (1d) of the side glass 6'. Displaying information on the side glass 6 ”may be suitable for displaying a message such as“ Thank you for waiting ”or“ Please board ”to passengers on the street, for example, in a taxi.
  • the video information to be displayed is unidirectionally transmitted to the outside of the vehicle or to the outside of the vehicle via the windshield 6 and the rear glass 6'and the side glass 6'which are the projected members constituting the vehicle.
  • the information display devices 100 and 100'displayed inside are described.
  • the present invention is not limited to these, and for example, together with the information display device 100 that displays information inside the vehicle, the information is displayed outside the vehicle. It is also possible to appropriately combine the information display device 100'to display the information display device 100'. According to this, for example, when applied to a bus or train which is a public transportation system, the rear glass 6'or the side glass 6'or the side glass 6' It is possible to display various information including advertisements, advertisements, notifications, etc.
  • HUD head-up display
  • the present invention is not limited to this, and instead of the above-mentioned transparent diffusion sheet material 55 (see FIG. 12), an antireflection coating having an increased reflectance of a specific polarized light is applied to the surface of the above-mentioned polarizing plate. It was confirmed that the same effect as the above-mentioned technique can be obtained because the reflectance of the image light beam can be increased and the intensity of the double image generated by the reflected image of the wind glass 6 can be significantly reduced at the same time.
  • PDLC Polymer Dispersed Liquid Crystal
  • Suntech Display Co., Ltd. is used to absorb or reflect a specific polarized light on the image light incident side.
  • a voltage may be applied to make the transparent sheet as a substitute for the transparent sheet.
  • a voltage is applied to a part of the PDLC.
  • the entire surface or part of the PDLC is made transparent to ensure rear visibility.
  • the above-mentioned sheet or film reduces the return of image light to the driver side so as not to interfere with driving.
  • the information display device 100 including the above-mentioned image projection device 48 and the optical direction conversion panel 54, and an example thereof. It is shown in FIG.
  • the configuration and operation of the HUD device 700 are the same as those shown in FIG. 22, and the configuration and operation of the information display device 100 are also the same as those shown in FIG.
  • it is possible to improve the utilization efficiency of the generated light further improve the uniform illumination characteristics, and at the same time, the modularized S-polarized wave light source device. It is possible to manufacture the product in a small size and at low cost, including the above.
  • the above-mentioned information display devices 100 and 100' are combined with the light source device 101.
  • the image display element 52 constituting the image projection device 48 it is also possible to adopt a large liquid crystal display panel 52 in which a plurality of relatively inexpensive liquid crystal display panels are combined and the joints are continuously integrated. In this case, the power consumption is also significantly reduced by reflecting and diffusing the light beam from the light source device 101 described above in one direction toward the transparent sheet 51 provided on the windshield 6 by the transparent sheet 51.
  • a vehicle information display device capable of displaying a larger image information can be realized relatively easily and inexpensively.
  • the present invention is not limited to the above-mentioned examples, and includes various modifications.
  • the above-described embodiment describes the entire system in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations.
  • it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment and it is also possible to add the configuration of another embodiment to the configuration of one embodiment.
  • (Vehicle) information display device 101 ... Light source device, 48 ... Image projection device, 52 ... Liquid crystal display panel (element) ), 50 ... protective cover, 51 ... unidirectional transparent sheet, 54 ... optical direction conversion panel, 55 ... transparent diffusion sheet material, 57 ... polarizing plate, 58 ... retardation plate, 300 ... smartphone.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Liquid Crystal (AREA)
  • Instrument Panels (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

L'invention concerne un système d'affichage d'informations qui peut afficher des informations vidéo à haute résolution et un système d'affichage d'informations de véhicule qui peut utiliser le système d'affichage d'informations pour afficher des informations à l'intérieur/à l'extérieur du véhicule.　Ce système d'affichage d'informations, qui affiche une vidéo à l'intérieur ou à l'extérieur d'un espace par l'intermédiaire d'un élément de réception de projection transparent disposé à l'intérieur de l'espace, est pourvu d'un dispositif de projection vidéo (48) disposé à l'intérieur de l'espace et module le flux lumineux provenant d'une source de lumière pour générer et projeter une lumière vidéo, d'une feuille transparente (51) qui est disposée sur la surface intérieure d'une région d'affichage configurée dans une partie de l'élément de réception de projection transparente, et d'un panneau de conversion de direction de lumière (54) qui convertit la direction de la lumière vidéo provenant du dispositif de projection vidéo en direction de la feuille transparente dans la région d'affichage ; la feuille transparente (51) comprenant une plaque de différence de phase, une plaque de polarisation de type à absorption qui absorbe des ondes polarisées spécifiques et un matériau de feuille de diffusion transparent ayant un effet de diffusion de lumière. La lumière vidéo, dont la direction a été convertie par le panneau de conversion de direction de lumière (54), est projetée vers l'intérieur ou l'extérieur de l'espace susmentionné.
PCT/JP2020/014011 2019-04-04 2020-03-27 Système d'affichage d'informations et système d'affichage d'informations de véhicule l'utilisant WO2020203767A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220155589A1 (en) * 2019-02-15 2022-05-19 Maxell, Ltd. Vehicle information display apparatus and information display system for vehicle
CN115723530A (zh) * 2022-12-01 2023-03-03 合众新能源汽车有限公司 一种基于车辆前风挡的驾驶员视野确定方法及装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0585222A (ja) * 1991-09-24 1993-04-06 Fujitsu Ltd ヘツドアツプデイスプレイ装置
JPH0618818A (ja) * 1992-12-09 1994-01-28 Casio Comput Co Ltd プロジェクタ装置
JPH0933856A (ja) * 1995-07-24 1997-02-07 Denso Corp 表示装置
JPH10119608A (ja) * 1996-10-14 1998-05-12 Denso Corp 移動体用ヘッドアップディスプレイ
JP2006227581A (ja) * 2005-01-21 2006-08-31 Dainippon Printing Co Ltd 透過反射両用投影スクリーン及びそれを備えた投影システム
JP2009529144A (ja) * 2006-03-03 2009-08-13 カン ヴィー コーク 一方向からしか見えない画像を表示する透明なスクリーン
JP2014026244A (ja) * 2012-07-30 2014-02-06 Jvc Kenwood Corp 表示装置
JP2019012271A (ja) * 2018-08-01 2019-01-24 マクセル株式会社 ヘッドアップディスプレイ装置
US20190079218A1 (en) * 2017-09-08 2019-03-14 Samsung Electronics Co., Ltd. Transparent panel and display system thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0585222A (ja) * 1991-09-24 1993-04-06 Fujitsu Ltd ヘツドアツプデイスプレイ装置
JPH0618818A (ja) * 1992-12-09 1994-01-28 Casio Comput Co Ltd プロジェクタ装置
JPH0933856A (ja) * 1995-07-24 1997-02-07 Denso Corp 表示装置
JPH10119608A (ja) * 1996-10-14 1998-05-12 Denso Corp 移動体用ヘッドアップディスプレイ
JP2006227581A (ja) * 2005-01-21 2006-08-31 Dainippon Printing Co Ltd 透過反射両用投影スクリーン及びそれを備えた投影システム
JP2009529144A (ja) * 2006-03-03 2009-08-13 カン ヴィー コーク 一方向からしか見えない画像を表示する透明なスクリーン
JP2014026244A (ja) * 2012-07-30 2014-02-06 Jvc Kenwood Corp 表示装置
US20190079218A1 (en) * 2017-09-08 2019-03-14 Samsung Electronics Co., Ltd. Transparent panel and display system thereof
JP2019012271A (ja) * 2018-08-01 2019-01-24 マクセル株式会社 ヘッドアップディスプレイ装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220155589A1 (en) * 2019-02-15 2022-05-19 Maxell, Ltd. Vehicle information display apparatus and information display system for vehicle
CN115723530A (zh) * 2022-12-01 2023-03-03 合众新能源汽车有限公司 一种基于车辆前风挡的驾驶员视野确定方法及装置

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