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WO2018139157A1 - Dispositif d'éclairage et dispositif d'affichage tête haute - Google Patents

Dispositif d'éclairage et dispositif d'affichage tête haute Download PDF

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Publication number
WO2018139157A1
WO2018139157A1 PCT/JP2017/046835 JP2017046835W WO2018139157A1 WO 2018139157 A1 WO2018139157 A1 WO 2018139157A1 JP 2017046835 W JP2017046835 W JP 2017046835W WO 2018139157 A1 WO2018139157 A1 WO 2018139157A1
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WIPO (PCT)
Prior art keywords
light
lens
illumination light
illumination
surface side
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2017/046835
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English (en)
Japanese (ja)
Inventor
小山　潤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hayashi Telempu Corp
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Hayashi Telempu Corp
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Publication date
Application filed by Hayashi Telempu Corp filed Critical Hayashi Telempu Corp
Priority to JP2018564181A priority Critical patent/JPWO2018139157A1/ja
Publication of WO2018139157A1 publication Critical patent/WO2018139157A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays

Definitions

  • the present invention relates to a lighting device including a plurality of light sources and a head-up display device including the lighting device.
  • a display original image formed by transmitting illumination light through a projection member such as a transmissive liquid crystal panel (LCD) is enlarged by a predetermined optical system, and a display image is shaped.
  • a head-up display device (hereinafter also referred to as a HUD device) that projects and displays on a display member such as a windshield of a moving body (for example, a vehicle) is known.
  • the HUD device is a device that is mounted on a vehicle such as an automobile and displays the display image in the field of view of the driver or passenger who is an observer during driving.
  • the projection member displays the flat LCD data of the display original image.
  • the original display image is optically emitted by transmitting the illumination light therethrough.
  • a display image of character information such as vehicle speed or image information such as a navigation image is displayed on the transparent (or translucent) display member such as a vehicle windshield or a display made of a half mirror called a combiner. Is projected and the scenery in front of the vehicle and the display image are superimposed and recognized by the driver. In the head-up display, the display image is formed at a point at infinity, so when the driver switches the viewpoint from the outside world to the display image, a physiological phenomenon that takes a time of about a few seconds of commas, that is, the physiological refocusing is performed. There is an advantage that the phenomenon does not occur.
  • the demand for the HUD device which is a display that can be viewed without the need for refocusing by the driver during driving, has been increasing.
  • the market for HUD devices is expected to increase by about eight times in FY2022 compared to FY2015.
  • the following conventional HUD illumination device is known.
  • Two stages of condensing lenses having a plurality of convex portions corresponding to LEDs that are a plurality of light sources, and the effective diameter of the condensing lens in the second stage farther from the LEDs is adjusted by adjusting the light imaging position.
  • An illumination unit that can achieve a large display area while reducing the focal length and achieving high illumination efficiency (Patent Document 1).
  • 2. By using a light source that is aligned with the lens optical axis of a condensing lens that has multiple convex parts and a light source that is decentered from the optical axis, the deviation of the imaging position is suppressed and the luminance unevenness of the virtual image is reduced. Lighting unit (Patent Document 2).
  • It includes a plurality of LEDs that are light sources, a lens array that collects light emitted from the light sources, and a field lens that adjusts the direction of the light, and the field lens has a diffusion region in at least a partial region on the incident surface side. Then, by transmitting the overlapping light from the field lens (light of the portion where the adjacent incident light overlaps) to the diffusion region, this uneven light is diffused and the brightness unevenness in which a bright line (bright line) is generated. (Patent Document 3). 4).
  • a lens array having a plurality of convex lenses corresponding to a plurality of light sources is provided, and at least a part of a boundary line that is a valley formed between adjacent convex lenses is formed into a concavo-convex shape, whereby the luminance of light emitted from the boundary line is increased.
  • An illuminating device in which luminance unevenness in which dark lines are generated by averaging is reduced (Patent Document 4).
  • the backlight including the illumination device that emits illumination light in the HUD device includes a light source including, for example, a plurality of LEDs, so that the brightness of the entire device can be improved.
  • a light source including, for example, a plurality of LEDs
  • the illumination light L ⁇ b> 3 emitted from one LED light source 10 and the other adjacent LED light sources 10 are emitted.
  • the illumination light L3 overlaps as shown by a broken line ellipse AA in the figure (the light of the overlapped part is called overlapping light).
  • luminance unevenness in this case, a so-called bright line
  • FIG. 15C depending on the arrangement of the plurality of LED light sources 10 ... 10, illumination light L3 emitted from one LED light source 10 and illumination emitted from another adjacent LED light source 10 are used. While the light L3 does not overlap as indicated by the broken line ellipse CC in the figure, a gap is generated between the illumination lights L3 (the illumination light having this gap is referred to as gap light).
  • the lens array 30 ′ is shown as an example of a collimator lens array having a plurality of adjacent collimator lenses 34 ′ on the exit surface side.
  • a Fresnel lens array having a plurality of adjacent Fresnel lenses on the exit surface side may be used.
  • Patent Document 1 is not a technique for reducing the above-described luminance unevenness and is not a technique for reducing the generation of loss light itself. An increase in the size of the light device cannot be avoided.
  • a light source with an ultra-high luminance of 3 million cd / m 2 or more such as a 1.8-inch size is required.
  • a configuration in which a diffuser is used to provide surface emission uniformity is common, but a multi-lamp low-power LED can also be used.
  • a high-power LED with a small number of lamps is used, the amount of loss light generated increases, leading to an increase in heat dissipation, a larger heat sink, and a larger backlight device.
  • the number of LED lamps is further increased in a configuration that does not reduce loss light generation itself as in the prior arts of Patent Documents 1 to 4, and as a result, This results in an increase in the amount of heat dissipation, an increase in the size of the heat sink, and an increase in the size of the backlight device.
  • the present invention is capable of suppressing an increase in the amount of heat dissipation, that is, reducing power consumption and cost, and enabling an increase in the size of the heat sink and an increase in the size of the backlight device, that is, a space saving of the device. It is another object of the present invention to provide a head-up display device.
  • the lighting device is A plurality of light sources each emitting illumination light in the same direction,
  • the plurality of light sources are arranged on the emission surface side, have a plurality of convex lens portions corresponding to each of the plurality of light sources, and the convex lens portions condense the illumination light emitted from the corresponding light sources.
  • a plurality of Fresnel lenses corresponding to each of the plurality of convex lens portions are disposed on the exit surface side of the condenser lens, and the Fresnel lens converts each illumination light emitted from the convex lens portions into parallel light.
  • a Fresnel lens array A prism plate disposed on the exit surface side of the Fresnel lens array, and when the illumination light emitted from the Fresnel lens array enters and exits, the brightness of the emitted illumination light
  • the prism plate that is uniformized in the plane direction of the prism plate as compared to the illumination light that has been written, and Is provided.
  • each Fresnel lens of the Fresnel lens array receives each illumination light from the convex lens portion.
  • the luminance in the planar view is improved.
  • a prism plate is arranged in the planar direction of the prism plate between the plurality of light sources, that is, between the plurality of Fresnel lenses.
  • the luminance distribution in the planar direction of the prism plate of each outgoing light emitted from the Fresnel lens is made uniform. Therefore, the generation of lost light itself can be reduced, power consumption and cost can be reduced, and the space of the apparatus can be saved. This effect becomes more prominent when a large number of LEDs are used as the light source.
  • a biconcave cylindrical lens is disposed on the exit surface side of the prism plate, and a biconvex cylindrical lens is disposed on the exit surface side of the biconcave cylindrical lens,
  • the axial direction of the biconcave cylindrical lens is preferably parallel to the axial direction of the biconvex cylindrical lens.
  • the plurality of light sources are arranged in a line, and the direction of the line is parallel to the axial direction of the biconcave cylindrical lens and the axial direction of the biconvex cylindrical lens. It is preferable that As a result, since the plurality of point light sources are arranged in a line so as to be a line light source, the light emitted from the biconcave cylindrical lens in a direction perpendicular to the axial direction is provided.
  • the bi-convex cylindrical lens can convert the light from the bi-concave cylindrical lens into parallel light as described above.
  • a diffuser is disposed on the exit surface side of the biconvex cylindrical lens.
  • the use of a diffuser can further reduce luminance unevenness.
  • a head-up display device includes any one of the above illumination devices that emits the illumination light, a projection member that forms and emits a display image by transmitting the illumination light from the illumination device, and an emission An optical system for shaping the displayed image, and projecting the shaped display image onto a display member, thereby displaying a virtual image of the display image so as to be visible to an observer.
  • any one of the illumination devices having the above-described features and operational effects is provided, the generation of loss light itself can be reduced, power consumption and cost can be reduced, and the space of the device can be saved. Can be realized. This becomes more noticeable when a large number of LEDs are used.
  • FIG. 1 is a schematic side view of a head-up display device mounted on a vehicle according to an embodiment of the present invention. It is a schematic side view of the other example of the head-up display device. It is a perspective view which shows the external appearance of the backlight which concerns on one Embodiment of this invention. It is a front view which shows the external appearance of the backlight. It is a disassembled front view which shows the structure of the illuminating device which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the structure of the illuminating device. It is the top view of each component which looked at the illuminating device from the output surface side.
  • FIG. 8 is a sectional view taken along line VIII-VIII in FIG. FIG.
  • FIG. 8 is a sectional view taken along line IX-IX in FIG. 7. It is a perspective view which shows the condensing lens which is a component of the illumination device. It is a perspective view which shows the Fresnel lens array which is a component of the illumination device. It is a perspective view which shows the prism board which is a component of the illumination device. It is a perspective view which shows the biconcave cylindrical lens which is a component of the illumination device. It is a perspective view which shows the biconvex cylindrical lens which is a component of the illumination device. (A) is a figure explaining overlapping light, (B) is a figure explaining parallel light without overlapping, and (C) is a figure explaining gap light.
  • FIG. 1 shows a schematic side view of a head-up display (HUD) device 700 mounted on a vehicle 600 according to an embodiment.
  • the HUD device 700 includes a backlight 200 including a lighting device 100 (FIG. 3) described later, a projection member 300, and an optical system 400.
  • the HUD device 700 is placed, for example, in the vicinity of the dashboard 620 of the vehicle 600 where a steering wheel 610 and an instrument panel (not shown) are provided.
  • the backlight 200 includes the illumination device 100 that is covered with, for example, a black upper frame 210 and that has the radiation surface 101 exposed. Illumination light that is, for example, uniform white light is emitted from the radiation surface 101 of the illumination device 100.
  • a projection member 300 in FIG. 1 is a transmissive dot matrix TFT liquid crystal panel (LCD) or the like, and displays flat LCD data of a display original image, which is an image or character data, on the liquid crystal panel, and the radiation of the illumination device 100 there.
  • a display original image is formed, and the display original image is optically emitted.
  • the optical system 400 is a concave mirror in this example, but may be an optical element such as a lens, a prism, or an optical fiber.
  • the display original image is shaped into a display image, and projected onto a display member 500A for display (hereinafter referred to as a windshield 500A) such as a windshield of the vehicle 600.
  • the display original image is enlarged or reduced by the optical system 400 and shaped such as correction of the inclination and distortion, that is, the optical characteristics between the windshield 500A and the HUD device are optimized.
  • the display image is displayed on the display member.
  • a display image that is character information such as the speed of the vehicle and image information such as a navigation image is projected, and the display image and the scenery in front of the vehicle are superimposed and recognized by the driver.
  • the display image appears to float in the landscape ahead of the vehicle 3 to 5 meters ahead of the vehicle.
  • the display image is, for example, only information necessary for driving the vehicle is displayed near the corner of the windshield 500A.
  • the display member on which the display image is projected is the windshield 500A in FIG. 1, but may be a combiner 500B shown in FIG.
  • the combiner 500B is a display composed of, for example, a half mirror, and when a display image is projected, the scenery in front of the vehicle and the display image are superimposed and recognized by the driver via the combiner 500B.
  • the combiner 500B and the HUD device 700 may be sold as an integrated device. In this case, the combiner 500B and the HUD device can be sold as a device with optimized optical characteristics before shipping. It is preferable that it can be simply attached to the vehicle as it is.
  • the illuminating device 100 includes a plurality of light sources 10 that emit illumination light, a condensing lens 20, a Fresnel lens array 30, and a prism plate 40. In this order toward the emission direction (upward direction in FIG. 5). Further, in the illumination device 100, a biconcave cylindrical lens 50 is disposed on the exit surface side of the prism plate 40, and a biconvex cylindrical lens 55 is disposed on the exit surface side of the biconcave cylindrical lens 50. It is arranged at a distance from 50. As shown in the exploded perspective view of the illuminating device 100 in FIG.
  • the plurality of light sources 10 are arranged in a straight line, and the illumination light is directed toward the same direction (upward in FIG. 6) orthogonal to the direction of the single line.
  • Each L1 is emitted.
  • the Fresnel lens array 30, the prism plate 40, the biconcave cylindrical lens 50, and the biconvex cylindrical lens 55 have a substantially rectangular shape having a longitudinal direction in the arrangement direction of the row of the light sources 10 when viewed in the vertical direction.
  • the longitudinal direction of the biconcave cylindrical lens 50 that is, the axial direction orthogonal to the curvature radius described later (axis C1 in FIG. 6)
  • the longitudinal direction of the biconvex cylindrical lens 55 that is, the axial direction orthogonal to the curvature radius described later (axis C2). ) Is in parallel.
  • the intervals between the plurality of light sources 10, the condensing lens 20, the Fresnel lens array 30, the prism plate 40, the biconcave cylindrical lens 50, and the biconvex cylindrical lens 55 are, for example, 1.0 mm, respectively. 7.0 mm, 0.5 mm, 0.5 mm, and 15.0 mm.
  • the diffuser (diffusion sheet) 70 of FIG. 5 is provided on the exit surface side of the biconvex cylindrical lens 55.
  • a transparent glass or a transparent resin (not shown) that protects the diffusion sheet 70 may be present on the foremost surface on the light emitting surface side of the lighting device 100, and in this case, the transparent glass or the transparent resin forms the radiation surface 101.
  • the arrangement direction of the row of the plurality of light sources 10 is parallel to the axial direction C1 of the biconcave cylindrical lens 50 and the axial direction C2 of the biconvex cylindrical lens 55.
  • the light source 10 is, for example, a white LED with a middle power and low cost, such as NJSW170C manufactured by Nichia.
  • a plurality of (four in the example of FIG. 5) light sources 10 shown in FIG. 5 are, for example, soldered onto a wiring board 12 that supplies and controls each light source 10. As shown in FIG. 7, only a plurality of light sources 10 are arranged in the row direction, the arrangement pitch P ⁇ b> 1 (FIG.
  • a heat sink (not shown) that is a cooling member that radiates heat generated by each light source 10 is opposite to the surface on which the plurality of light sources 10 are mounted. It may be attached to the surface in an electrically insulated state.
  • the power per lamp is inferior, but by using a large number of low-cost LEDs and increasing the light utilization efficiency, a significant reduction in size and cost is realized. ing.
  • the power consumption of about 2 W in the example of this embodiment is compared to the unit size of the backlight with a power consumption of less than 10 W of the conventional product (eg, length 70 to 85 ⁇ width 40 to 45 ⁇ height 30 to 35 mm).
  • the backlight unit size is, for example, length 70 ⁇ width 35 ⁇ height 37 mm.
  • the power consumption is also reduced, and as a result, the effect of eliminating the heat sink that has been conventionally required is great, and space saving can be realized. Depending on the required luminance and the size of the backlight, this may occur when a heat sink is required. However, even in this case, the heat sink can be downsized compared to the conventional case, and space saving can be realized.
  • the condensing lens 20 of FIG. 5 has a plurality of convex lens portions 22... 22 corresponding to each of the plurality of light sources 10, and the convex lens portion 22 condenses the illumination light L1 emitted from the corresponding light source 10.
  • the illumination light L2 is emitted. That is, the condensing lens 20 suppresses the spread of the illumination light so as to collect the illumination light L1 emitted from the plurality of light sources 10.
  • the condenser lens 20 is disposed on the emission surface side of the plurality of light sources 10. As shown in FIGS. 8 and 9, the plurality of convex lens portions 22 are disposed apart from each other on the exit surface side of the condenser lens 20, and as shown in FIG. 7, Corresponding by being present at substantially the same position when viewed in the vertical direction. Therefore, the same number of convex lenses 22 as the plurality of light sources 10 is formed on the condenser lens 20.
  • the condenser lens 20 is manufactured by injection molding of a thermoplastic resin such as PMMA or PC (in this embodiment, PC).
  • the condenser lens 20 has a length of about 60 mm, a width of about 8 mm, and a depth of about 3.1 mm.
  • the radius of curvature of each convex lens portion 22 shown in FIG. 10 is, for example, about 3 mm
  • the interval P2 between adjacent convex lens portions 22 is, for example, 8 mm
  • the Fresnel lens array 30 in FIG. 5 has a plurality of Fresnel lenses 34 corresponding to each of the plurality of convex lens portions 22.
  • the Fresnel lens array 30 is disposed on the exit surface side of the condenser lens 20.
  • Each Fresnel lens 34 receives each illumination light L2 emitted from the corresponding convex lens portion 22, and the direction of the illumination light L2 is parallel (viewed substantially parallel) from each Fresnel lens 34.
  • Illumination light L3 converted in a uniform manner is emitted. Specifically, because the Fresnel lens 34 suppresses the spread of the light of each illumination light L2, the illumination light L3 in which the adjacent illumination lights L3 become parallel light without overlapping (at least not overlapped light).
  • the light is emitted from the Fresnel lens 34. Accordingly, the plurality of Fresnel lenses corresponding to the plurality of convex lens portions 22 of the condenser lens 20 convert the illumination light L2 from the convex lens portion 22 into parallel light L3, and the plane direction xy ( FIG. 6) Improves visual brightness.
  • the plurality of Fresnel lenses 34 are arranged adjacent to each other on the emission surface side of the Fresnel lens array 30, and as shown in FIG. 7, the plurality of light sources 10 and the convex lens portions 22 are arranged. Corresponding to each other by being present at substantially the same position when viewed in the vertical direction.
  • each Fresnel lens 34 is shown only by a square frame (for example, the length of one side is about 8 mm) for ease of viewing. Therefore, the same number of the plurality of Fresnel lenses 34 as that of the plurality of light sources 10 are formed on the Fresnel lens array 30. That is, the outgoing light L3 is emitted from the entire surface of the Fresnel lens array 30, but in detail, the outgoing light L3 is emitted by being divided into six light emitting regions.
  • the Fresnel lens array 30 is manufactured by injection molding of a thermoplastic resin such as PMMA or PC (in this embodiment, resin parts other than the condenser lens are PMMA).
  • the Fresnel lens array 30 has a length of about 48 mm, a width of about 8.1 mm, and a depth of about 8.4 mm.
  • each Fresnel lens 34 shown in FIG. 11 has concentric circular protrusions 32 (including a circular protrusion at the center) constituting the lens (pitch length is 0.1 to 0.00).
  • the corresponding Fresnel lens 34 may further suppress the spread of the light and emit the illumination light L3.
  • the lens array 30 ′ is represented as a collimator lens array having a plurality of adjacent collimator lenses 34 ′ on the exit surface side.
  • the prism plate 40 is provided, for example, when the illumination lights L3 emitted from the Fresnel lenses 34 may become the overlapping light or the gap light shown in FIGS. 15 (A) and 15 (C). That is, the prism plate 40 is generated by the boundary of each illumination light (for example, the overlapping light or the gap light) seen between the plurality of light sources 10, that is, between the plurality of Fresnel lenses 34 in the planar direction xy of the prism plate. By making the difference in brightness of the illumination light inconspicuous, the luminance of the illumination light L4 emitted from the prism plate 40 is made uniform compared to the incident illumination light L3.
  • the luminance distribution in the planar direction xy of the prism plate 40 of each outgoing light L3 emitted from the Fresnel lens 34 can be made uniform.
  • the provision of the prism plate 40 prevents the overlapping light or the gap light from being emitted in the emission direction of the illumination light L3 emitted from each Fresnel lens 34 of the Fresnel lens array 30 and the spread of the emitted light L3. Therefore, the step of precisely adjusting the Fresnel lens 34, which is necessary for this purpose, can be eliminated.
  • the prism plate 40 is manufactured by injection molding of acrylic resin.
  • the prism plate 40 has a length of about 50 mm, a width of about 9 mm, and a depth of about 5 mm.
  • the prism plate 40 shown in FIG. 12 has fine protrusions 42 whose cross section is an isosceles triangle in a direction orthogonal to the longitudinal direction (parallel to the axial axis C1 and the axis C2). , And continuously formed at a pitch of about 0.1 mm.
  • the isosceles triangle of the protrusion 42 has an apex angle of 50 to 65 degrees, specifically about 55 degrees and a height of about 0.1 mm.
  • the apex angle, the height, and the plate thickness of the prism plate 40 are optimized by the results of experiments and simulations so that the bright line and the dark line do not occur.
  • the Fresnel lens array 30 and the prism plate 40 described above are provided in addition to the condenser lens 20, at least the generation of overlapping light can be reduced, so that the power consumption and cost of the LED 10 can be reduced. It becomes. Further, since a heat sink (not shown) can be omitted or reduced in size, the space of the apparatus can be saved. This effect becomes more remarkable when a large number of LEDs are used.
  • the biconcave cylindrical lens 50 expands the beam width of the light L4 emitted from the prism plate 40 in a direction orthogonal to the axis C1.
  • the biconvex cylindrical lens 55 collimates the light L5 from the biconcave cylindrical lens into parallel light L6 by suppressing the spread of the light in the direction orthogonal to the axis C1 (ie, the axis C2). And so-called surface emission is realized.
  • the plurality of point light sources 10 are arranged so as to be a linear light source by being arranged in a straight line, so that the biconcave cylindrical lens 50 and the biconvex cylindrical lens 55 are arranged.
  • the linear illumination light L4 (including a substantially strip-like straight line having a slight width) can be converted into the planar illumination light L6, and the illumination device 100 can be a surface light source.
  • the biconcave cylindrical lens 50 and the biconvex cylindrical lens 55 in combination it is possible to realize surface emission with excellent luminance uniformity.
  • the biconcave cylindrical lens 50 shown in FIG. 13 and the biconvex cylindrical lens 55 shown in FIG. 14 are manufactured by injection molding of acrylic resin.
  • the biconcave cylindrical lens 50 and the biconvex cylindrical lens 55 are each aspherical and have a curved cross section in a plane perpendicular to the longitudinal direction (parallel to the axes C1 and C2).
  • the thickness between the two aspherical maximum concave portions of the biconcave cylindrical lens 50 is about 1 mm, the length is about 50 mm, the width is about 10 mm, and the depth is about 3.4 mm.
  • the thickness of the biconvex cylindrical lens 55 (the length between the maximum convex portions of two aspheric surfaces, ie, the depth) is about 7 mm, the length is about 50 mm, and the width is about 24 mm.
  • the diffusion sheet 70 is made of, for example, PET resin, which is a thermoplastic engineering plastic.
  • the diffusion sheet 70 is formed by forming a minute lens array on the surface, or by coating the surface with a resin that diffuses light. Can be diffused to provide more uniform illumination light.
  • the diffusion sheet 70 has a light diffusion function for further diffusing the emitted light L6 from the biconvex cylindrical lens 55 in order to reduce luminance unevenness.
  • SYMBOLS 10 (plurality) light source 20
  • Condensing lens 22 (plurality) convex lens part 30
  • Fresnel lens array 34 Fresnel lens 40
  • Prism plate 50 Biconcave cylindrical lens 55
  • Biconvex cylindrical lens 70 Diffusion sheet (diffuser)
  • Illumination device 300 Projection member 400

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  • Physics & Mathematics (AREA)
  • Liquid Crystal (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne un dispositif d'éclairage permettant une réduction de la consommation d'énergie et une réduction des coûts, et permettant une économie d'espace. L'invention comprend : une pluralité de sources de lumière (10), chacune transmettant une lumière d'éclairage (L1) orientée dans la même direction ; une lentille de condenseur (20) disposée sur le côté de la surface de distribution de la pluralité de sources de lumière (10), ayant une pluralité d'unités de lentille convexe (22) correspondant respectivement à la pluralité de sources de lumière (10), chacune des unités de lentille convexe (22) condensant la lumière d'éclairage (L1) transmise à partir de la source de lumière correspondante (10) ; un réseau de lentilles de Fresnel (30) disposé sur le côté de la surface de transmission de la lentille de condenseur (20), ayant une pluralité de lentilles de Fresnel (34) correspondant respectivement à la pluralité d'unités de lentille convexe (22), chacune des lentilles de Fresnel convertissant en une lumière parallèle (L3) la lumière d'éclairage correspondante (L2) transmise à partir de l'unité de lentille convexe correspondante ; et une plaque de prisme (40) disposée sur le côté de la surface de transmission du réseau de lentilles de Fresnel (30), à travers laquelle pénètre la lumière d'éclairage (L3) transmise à partir du réseau de lentilles de Fresnel (30) pour sortir sous la forme d'une lumière d'éclairage (L4) de telle sorte que sa luminance est rendue uniforme dans une direction plane par rapport à la lumière d'éclairage (L3).
PCT/JP2017/046835 2017-01-27 2017-12-27 Dispositif d'éclairage et dispositif d'affichage tête haute Ceased WO2018139157A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4300168A1 (fr) * 2022-06-28 2024-01-03 N. S. International Ltd. Système de gradation locale pour affichage tête haute
JP2024091699A (ja) * 2019-01-17 2024-07-05 マクセル株式会社 情報表示装置

Citations (6)

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Publication number Priority date Publication date Assignee Title
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