WO2016208378A1 - Dispositif d'affichage à cristaux liquides - Google Patents

Dispositif d'affichage à cristaux liquides Download PDF

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Publication number
WO2016208378A1
WO2016208378A1 PCT/JP2016/066884 JP2016066884W WO2016208378A1 WO 2016208378 A1 WO2016208378 A1 WO 2016208378A1 JP 2016066884 W JP2016066884 W JP 2016066884W WO 2016208378 A1 WO2016208378 A1 WO 2016208378A1
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WIPO (PCT)
Prior art keywords
light
lens
liquid crystal
crystal display
optical element
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PCT/JP2016/066884
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English (en)
Japanese (ja)
Inventor
裕輝 春山
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日本精機株式会社
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Publication of WO2016208378A1 publication Critical patent/WO2016208378A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • 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
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells

Definitions

  • the present invention relates to a liquid crystal display device mounted on a vehicle such as an automobile.
  • a head-up display device that displays information on a windshield of a vehicle is known.
  • a head-up display device includes a display device (liquid crystal display device) that emits display light, and the display light emitted from the display device is irradiated onto a windshield or the like, whereby display light is transmitted to the user.
  • the displayed image is visually recognized as a virtual image.
  • the display described in Patent Document 1 includes a light source that emits light, a condenser lens that collimates the light from the light source, and a lens that adjusts the diffusion angle of the light that has passed through the condenser lens in the vertical direction and the horizontal direction, respectively.
  • the present invention has an object to provide a liquid crystal display device capable of suppressing an increase in cost while maintaining light irradiation efficiency to an eyebox.
  • the present invention provides a light source that emits a plurality of light rays, a first optical element that substantially parallelizes the plurality of light rays, and the plurality of light rays that are substantially parallelized in a traveling direction of the substantially parallel light rays.
  • a second optical element that diffuses in a first direction orthogonal to the second direction that is orthogonal to the traveling direction and intersects the first direction; and a light beam emitted from the second optical element
  • a liquid crystal display panel that emits display light according to an image based on the plurality of light beams that have passed through the first to third optical elements.
  • the liquid crystal display panel includes an image display area, and first light is emitted from the first optical element when the third optical element is viewed from the liquid crystal display panel side.
  • An emission area, a second light emission area where light is emitted from the second optical element, and a third light emission area where light is emitted from the third optical element are in the first and second directions.
  • the width dimension along is formed wider than the width dimension along the first and second directions of the image display area.
  • the second optical element includes an incident surface on which the plurality of light beams are incident and an exit surface on which the plurality of light beams that have passed through the second optical element are emitted.
  • a plurality of convex lens portions are arranged in an array along the first and second directions on the surface and the exit surface.
  • the present invention further includes a reflecting mirror that reflects the display light toward the projection member, wherein the first direction coincides with the height direction of the vehicle, and the second direction coincides with the width direction of the vehicle. It is characterized by.
  • liquid crystal display device that can achieve the initial purpose and can suppress an increase in cost while maintaining the light irradiation efficiency to the eyebox.
  • FIG. 1 is a schematic view of a vehicle equipped with a head-up display device according to an embodiment of the present invention. It is sectional drawing of the head-up display apparatus by the same embodiment.
  • (A) by the same embodiment is a top view of the 2nd lens
  • (b) is a side view of the 2nd lens
  • (c) is a front view of the 2nd lens.
  • (A) by the same embodiment is a top view of a 3rd lens
  • (b) is a side view of a 3rd lens
  • (c) is a front view of a 3rd lens. It is a perspective view of the 1st lens by the embodiment.
  • FIG. 4 is a diagram schematically showing a positional relationship among a liquid crystal display panel, first to third lenses, and a light source according to the embodiment. It is the schematic which shows the path
  • (A) is the schematic which shows the path
  • (b) is the schematic diagram which shows the path
  • the head-up display device 100 is installed, for example, in a dashboard of the vehicle 200 as shown in FIG.
  • the head-up display device 100 emits display light Lo representing an image toward a windshield 201 (an example of a projection member) of the vehicle 200, and displays a virtual image V of the image by the display light Lo reflected by the windshield 201. .
  • the viewer 1 mainly the driver of the vehicle 200
  • the display image has, for example, a rectangular shape extending in the vertical direction and the horizontal direction when viewed from the viewer 1.
  • the X direction is along the vehicle front-rear direction
  • the Y direction is along the vehicle width direction
  • the Z direction is along the vehicle height direction.
  • the directions in which the arrows of the X, Y, and Z coordinate systems are directed are defined as + X, + Y, and + Z
  • the opposite directions are defined as -X, -Y, and -Z.
  • the head-up display device 100 includes a display unit 110, a concave mirror (reflection mirror) 120, a housing 130, and a heat dissipation member 140.
  • the housing 130 is formed of a non-translucent resin material or a metal material and has a hollow, substantially rectangular parallelepiped shape.
  • the housing 130 includes an upper plate 130a and a lower plate 130b that face each other in the Z direction.
  • An opening 130c penetrating in the thickness direction is formed on the ⁇ X side (the vehicle front side in this example) of the upper plate 130a.
  • a curved plate-like window portion (translucent portion) 131 made of a translucent resin material such as acrylic through which the display light Lo passes is fitted in the opening portion 130c.
  • the housing 130 includes a side plate 130d that connects the upper plate 130a and the lower plate 130b on the + X side (the vehicle rear side in this example). An opening 132 penetrating in the X direction is formed in the side plate 130d.
  • the heat radiating member 140 is fixed in the opening 132 of the housing 130.
  • the heat radiating member 140 is a fin-type structure formed of a metal material such as aluminum or a heat conductive resin material.
  • the heat radiating member 140 is configured to be able to release heat generated by the display unit 110 (specifically, a light source 119 described later) to the outside.
  • a partition wall 130e orthogonal to the surface is formed on the inner surface of the upper plate 130a of the housing 130 (a surface exposed to the internal space of the housing 130), and a partition wall orthogonal to the surface is formed on the inner surface of the lower plate 130b of the housing 130. 130f is formed. Both the partition walls 130e and 130f are located facing each other along the Z direction.
  • the display unit 110 emits display light Lo representing a predetermined image.
  • the display unit 110 includes first to third lenses 111 to 113, a substrate 116, a light source 119, and a first case body. 114, a second case body 115, a light diffusion member 117, and a liquid crystal display panel 118 having an image display area D described later.
  • the substrate 116 is installed on the inner surface of the heat dissipation member 140 (surface exposed to the internal space of the housing 130), and various wirings are printed on the upper surface of the substrate 116 (surface opposite to the surface in contact with the heat dissipation member 140). . As shown in FIG. 7, a plurality (12 in this example) of light sources 119 are mounted on the upper surface of the substrate 116.
  • the light source 119 includes, for example, an LED (Light Emitting Diode).
  • the light sources 119 are arranged in a matrix on the substrate 116. Specifically, when the Z direction is the row direction and the Y direction is the column direction, the LEDs are arranged in a matrix of 2 rows ⁇ 6 columns.
  • the first case body 114 does not leak the light beam from the light source 119 to the outside, and allows the light beam to pass through the first to third lenses 111 to 113 held inside the first case body 114.
  • the first case body 114 is formed in, for example, a rectangular cylindrical shape using a non-translucent resin material, and includes an inner surface of the heat radiating member 140 and both partition walls 130 e and 130 f of the housing 130. It is installed between.
  • 1st case body 114 is provided with the 1st cylinder part 114a, the 2nd cylinder part 114b, and the collar part 114c.
  • One end (the end in the + X direction) of the first cylindrical portion 114a is in contact with the inner surface of the heat dissipation member 140 while surrounding the periphery of the substrate 116, and the other end (the end in the ⁇ X direction) is in contact with the second cylindrical portion 114b. It is connected.
  • the 2nd cylinder part 114b is formed smaller than the 1st cylinder part 114a in the Z direction. Further, the other end (the end in the + X direction) of the second cylindrical portion 114b is connected to the other end (the end in the ⁇ X direction) of the first cylindrical portion 114 with a step.
  • the flange portion 114c extends outward from one end of the first tube portion 114a and is in surface contact with the inner surface of the heat dissipation member 140.
  • Two positioning pins (not shown) are provided in the flange portion 114c, and positioning is performed by inserting these positioning pins into positioning holes (not shown) formed in two places on the heat radiation member 140. In this positioned state, the flange portion 114c is fastened to the heat radiating member 140 using screws (not shown).
  • the first case body 114 is divided into a first housing and a second housing, and the first housing and the second housing are appropriately fixed by hook fixing or the like. You may fix using a fixing means.
  • a pair of concave portions 114d extending in the Y direction for holding the second lens 112 is formed on the inner surface of the second cylindrical portion 114b.
  • the pair of recesses 114d are located opposite to each other in the Z direction.
  • a pair of recesses 114e extending in the Y direction for holding the third lens 113 is formed on the inner surface of the second cylindrical portion 114b.
  • the pair of recesses 114e are located opposite to each other in the Z direction at positions closer to the partition walls 130e and 130f than the pair of recesses 114d.
  • the first to third lenses 111 to 113 are held inside the first case body 114.
  • the first lens 111 and the first lens 111 from the side closer to the light source 119 are arranged so that the light beam from the light source 119 passes through the first lens 111, the second lens 112, and the third lens 113 in the thickness direction in that order.
  • the second lens 112 and the third lens 113 are arranged in this order.
  • the vertical direction (short direction) of the first to third lenses 111 to 113 is It coincides with the Z direction
  • the lateral direction (longitudinal direction) of the first to third lenses 111 to 113 coincides with the Y direction.
  • the first lens 111 corresponds to a first optical element
  • the second lens 112 corresponds to a second optical element
  • the third lens 111 corresponds to a third optical element.
  • the first lens 111 is formed in a rectangular plate shape with a transparent optical resin or optical glass. As shown in FIG. 2, the first lens 111 includes a plurality of convex lens portions 111 a and leg portions 111 b that are fitted into the first cylindrical portion 114 a.
  • the leg portions 111 b are formed in L-shaped columnar shapes on both sides of the first lens 111 in the longitudinal direction of the first lens 111.
  • the leg portion 111b extends from the side portion of the convex lens portion 111a along the vertical direction, and is bent so that the tip thereof is along the thickness direction of the first lens 111 (a direction that coincides with the X direction in this example). Is formed.
  • the first lens 111 is disposed such that the tip end surface of the leg portion 111 b is in contact with the upper surface of the substrate 116. Thereby, the first lens 111 is held in the first tube portion 114a through the leg portion 111b. At this time, the movement of the first lens 111 in the direction away from the substrate 116 in the leg 111b is also restricted by the step between the first cylinder 114a and the second cylinder 114b.
  • the convex lens portion 111a of the first lens 111 is formed in a biconvex lens shape as shown in FIG. 5, and is arranged in a matrix of 2 rows ⁇ 6 columns, similar to the light source 119 described above. In FIG. 5, the legs 111b are omitted. Each convex lens portion 111a is positioned to face each light source 119 in the X direction so as to receive light from each light source 119 as shown in FIG. Each convex lens portion 111a of the first lens 111 has a function of condensing a plurality of light beams emitted from the light source 119 and making the plurality of light beams substantially parallel along the X direction.
  • the first light emission region R1 where the light is emitted from the first lens 111 is The width dimension along the Y direction and the Z direction is wider than the width dimension along the Y direction and the Z direction of the image display region D (see FIG. 6).
  • the width dimension of the first light emission area R1 is wider than the width dimension of the image display area D in the Y direction as well.
  • the second lens 112 is formed in a rectangular plate shape with a transparent optical resin or optical glass as shown in FIG. Specifically, the second lens 112 is held by the first case body 114, the incident surface 112i on which a plurality of light rays are incident, the exit surface 112o from which the plurality of light beams that have passed through the second lens 112 exit.
  • a plurality of substantially collimated light beams emitted from the first lens 111 are described later perpendicular to the traveling direction of the collimated light beams (that is, the X direction). It has a function of diffusing in a first direction and a later-described second direction that is orthogonal to the traveling direction and orthogonal to (intersects with) the first direction.
  • a plurality of convex lens portions 112a are formed on the incident surface 112i of the second lens 112, and a plurality of convex lenses 112a are formed on the exit surface 112o of the second lens 112.
  • the convex lens portion 112b is formed.
  • the entrance surface 112i and the exit surface 112o are along the first direction, which is the short direction of the second lens 112, and the second direction, which is the longitudinal direction of the second lens 112.
  • a plurality of convex lens portions 112a and 112b are arranged in an array.
  • the first direction here coincides with the Z direction, which is the height direction of the vehicle, and the second direction coincides with the Y direction, which is the vehicle width direction.
  • the convex lens part 112a of the entrance surface 112i and the convex lens part 112b of the exit surface 112o are provided at positions facing the second lens 112 in the thickness direction.
  • the holding portions 112 c of the second lens 112 are formed in a rectangular column shape extending in the longitudinal direction of the second lens 112 at both ends of the second lens 112 in the short direction. As shown in FIG. 2, the second lens 112 is held in the second cylindrical portion 114b by fitting the holding portion 112c of the second lens 112 into the concave portion 114d of the second cylindrical portion 114b.
  • the incident surface 112i and the exit surface 112o of the second lens 112 allow light rays to pass through the short direction (that is, the longitudinal direction) of the second lens 112 and the longitudinal direction of the second lens 112 (that is, by the convex lens portions 112a and 112b). It has a function of diffusing horizontally. Based on the pitch and radius of curvature of the convex lens portions 112a and 112b of the second lens 112, the light diffusion angle can be adjusted. Further, the exit surface 112o of the second lens 112 has a function of adjusting the diffusion angle of light rays that are not completely parallelized by the convex lens portion 112b.
  • the second emission region R2 from which light is emitted from the second lens 112 is the Y direction.
  • the width dimension along the Z direction is wider than the width dimension along the Y direction and the Z direction of the image display region D (see FIG. 6).
  • the width dimension of the second emission region R2 is formed wider than the width dimension of the image display region D in the Y direction as well.
  • the third lens 113 is formed in a rectangular plate shape with a transparent optical resin or optical glass.
  • the third lens 113 includes an incident surface 113i on which a plurality of light beams are incident, an exit surface 113o on which a plurality of light beams that have passed through the inside of the third lens 113 in the thickness direction are emitted, and the first lens 113 A holding portion 113b held by the case body 114, and in this case, has a function of adjusting the angle of the light beam emitted from the second lens 112.
  • the entrance surface 113i of the third lens 113 is formed by a flat portion 113a as shown in FIG. 4C, and the exit surface 113o of the third lens 113 diffuses light rays in accordance with the liquid crystal display panel 118.
  • Possible to have a concave toroidal surface That is, on the exit surface 113 o of the third lens 113, a concave curved surface is formed along the longitudinal direction of the third lens 113 and the lateral direction of the third lens 113.
  • the radius of curvature of the curved surface along the short direction of the exit surface 113o is set to be larger than the radius of curvature of the curved surface along the longitudinal direction of the exit surface 113o, and the exit surface 113o is the image display area D of the liquid crystal display panel 118. It has a function of diffusing light so as to illuminate the entire area.
  • the holding portions 113b of the third lens 113 are formed in a rectangular column shape extending in the longitudinal direction of the third lens 113 at both ends of the third lens 113 in the short direction. As shown in FIG. 2, the third lens 113 is held by the second cylindrical portion 114b by fitting the holding portion 113b of the third lens 113 into the concave portion 114e of the second cylindrical portion 114b.
  • the third emission region R3 where light is emitted from the third lens 113 is the Y direction.
  • the width dimension along the Z direction is wider than the width dimension along the Y direction and the Z direction of the image display region D (see FIG. 6).
  • the width dimension of the third emission region R3 is wider than the width dimension of the image display region D in the Y direction as well.
  • the second case body 115 is formed of a non-translucent resin material in a rectangular frame shape as shown in FIG.
  • the 2nd case body 115 is fixed to the surface on the opposite side to the 1st case body 114 in both partition 130e, 130f.
  • the light diffusing member 117 and the liquid crystal display panel 118 are each extended along the YZ plane and held inside the second case body 115 in a state of facing each other.
  • the light diffusing member 117 and the liquid crystal display panel 118 are bonded to the second case body 115 with an adhesive.
  • the light diffusion member 117 is provided at a position close to the first case body 114, and the liquid crystal display panel 118 is provided at a position exposed to the internal space of the housing 130.
  • the liquid crystal display panel 118 is formed, for example, in the shape of a rectangular plate by attaching polarizing plates to both surfaces of a liquid crystal cell in which a liquid crystal layer is sealed in a pair of transparent substrates on which a transparent electrode film is formed. Then, each pixel of the image display area D provided in the liquid crystal display panel 118 is switched between a transmissive state and a non-transmissive state according to the image. Accordingly, the liquid crystal display panel 118 emits display light Lo corresponding to the image based on the plurality of light beams that have passed through the first to third optical elements 111 to 113.
  • the light diffusion member 117 is a film-like or plate-like member using a transparent resin material as a base material.
  • the light diffusing member 117 is configured to be capable of diffusing light reflected from the exit surface 113 o of the third lens 113 by external light that has entered the housing 130.
  • the concave mirror 120 includes a holder made of a resin material such as polycarbonate and a mirror surface obtained by evaporating a metal such as aluminum on the holder.
  • the concave mirror 120 is positioned facing the liquid crystal display panel 118 in the housing 130, and is installed in a direction inclined with respect to the display light Lo from the display unit 110.
  • the concave mirror 120 is configured to magnify the image represented by the display light Lo while reflecting the display light Lo from the display unit 110 toward the windshield 201 and to irradiate the windshield 201 with the magnified image.
  • the action of light rays when the light rays emitted from the respective light sources 119 pass through the first to third lenses 111 to 113 will be described.
  • the light beam in the Y direction corresponds to the horizontal direction of the image (virtual image V)
  • the light beam in the Z direction corresponds to the vertical direction of the image (virtual image V).
  • a plurality of light beams La are irradiated radially from each light source 119 toward each convex lens portion 111a of the first lens 111.
  • the convex lens portion 111a of the first lens 111 refracts the light beam La at the incident surface and the exit surface thereof, so that the light beam La is parallelized along the X direction, and the light beam Lb is emitted from the exit surface of the convex lens portion 111a.
  • Each convex lens portion 112a on the incident surface 112i side of the second lens 112 on which the light beam Lb is incident diffuses the light beam Lb at a predetermined diffusion angle in the vertical direction and the horizontal direction.
  • the light beam Lb guided into the second lens 112 is collimated with the light beam P parallel to the thickness direction of the second lens 112 and the thickness direction of the second lens 112.
  • the convex lens portion 112b on the exit surface 112o side of the second lens 112 collimates the light that has not been collimated (hereinafter referred to as non-parallel light Q). It adjusts so that it may diffuse like the light ray (hereinafter referred to as parallel light P).
  • the light beam that has passed through the second lens 112 enters the incident surface 113i of the third lens 113 as a light beam Lc, as shown in FIG. Then, the light beam Lc traveling into the third lens 113 is emitted from the exit surface 113o. At this time, the exit surface 113o of the third lens 113 diffuses the light beam that has passed through the third lens 113 at a predetermined diffusion angle, and the diffused light beam is converted into the light beam Ld to the liquid crystal display panel 118 (image display region). Irradiate the entire area of D).
  • the third lens 113 transmits light emitted from each convex lens 112b constituting the second lens 112 to the liquid crystal display panel.
  • the enlarged illumination is not performed on the entire area 118 (image display area D).
  • the light beam emitted from each convex lens 112b illuminates only the corresponding area of the liquid crystal display panel 118 (image display area D).
  • the second lens 112 and the third lens 113 have independent light distribution control functions, the second lens 112 and the third lens 113 are provided between the second lens 112 and the third lens 113.
  • the formed gap can be made as small as possible. In this case, the display unit 110 can be made more compact.
  • the viewer 1 can visually recognize the virtual image V by receiving the display light Lo reflected from the windshield 201 when the position of his / her eyes is in the eye box Ib which is a virtual space.
  • the adjustment of the light beam that is not completely collimated by the second lens 112 is performed as described above. Can be enhanced.
  • a head-up display device 100 as an example of a liquid crystal display device includes a light source 119 that emits a plurality of light rays, a first lens 111 that substantially parallelizes the plurality of light rays 119, and a plurality of substantially parallelized light sources.
  • the third lens 113 that adjusts the angle of the light beam emitted from the second lens 112, and the display light Lo corresponding to the image is emitted based on the plurality of light beams that have passed through the first to third lenses 111 to 113.
  • a liquid crystal display panel 118 is a liquid crystal display panel 118.
  • the second lens 112 includes an incident surface 112i on which a plurality of light rays are incident, and an exit surface 112o on which the plurality of light beams that have passed through the second lens 112 exit, and the incident surface 112i and the exit surface.
  • a plurality of convex lens portions 112a and 112b are arranged in an array in 112o along the first and second directions. As described above, the convex lens portions 112a and 112b are arranged (formed) on the entrance surface 112i and the exit surface 112o, so that the non-parallel light Q is adjusted to pass through the same optical path as the parallel light P. Therefore, since the dispersion of the light diffusion angle is reduced, the luminance in the eye box Ib is efficiently increased.
  • the convex lens portion 112b formed on the emission surface 112o of the second lens 112 in the above embodiment may be omitted, and the emission surface 112o may be formed in a flat shape.
  • the second lens 112 and the third lens 113 are held by the first case body 114 via their own holding portions 112c and holding portions 113b, but these holding portions 112c and 113b are used. May be omitted.
  • the second lens 112 and the third lens 113 may be bonded to the first case body 114 using an adhesive.
  • the exit surface 113o of the third lens 113 has a concave toroidal shape, but the exit surface 113o of the third lens 113 has a convex lens shape, a free-form surface shape, a simple spherical shape, and a cylindrical shape. It may be a surface shape or an aspherical shape.
  • the incident surface 113i of the third lens 113 has a planar shape, but this also has a concave toroidal surface shape, a convex lens shape, a free-form surface shape, a simple spherical shape, a cylindrical surface shape, or the like, like the exit surface 113o.
  • An aspherical shape may be used, and when the shape of the incident surface 113i is a shape other than a planar shape, the shape of the exit surface 113o can be a planar shape as necessary.
  • the light source 119 is an LED, but may be a light source such as an incandescent light bulb.
  • the pitch and size (curvature radius) of the convex lens portions 112a and 112b of the second lens 112 can be changed as appropriate. By changing these, the diffusion angle of the light beam can be adjusted.
  • the convex lens portion 111a of the first lens 111 is formed in a biconvex lens shape, but may be formed in a plano-convex lens shape or a Fresnel lens shape. Further, instead of the first lens 111, a reflector that makes light rays substantially parallel may be provided as the first optical element.
  • the concave mirror 120 in the above embodiment may be omitted.
  • the display light Lo from the display unit 110 is directly applied to the windshield 201 which is a projection member.
  • the Z direction (vertical direction) that is the first direction in which the second lens 112 diffuses light and the Y direction (lateral direction) that is the second direction are orthogonal to each other. It is sufficient that they intersect, and they do not necessarily have to be orthogonal.
  • the first to third lenses 111 to 113 are formed in a rectangular plate shape.
  • the present invention is not limited to this, and may be formed in a square, circle, ellipse, or polygonal plate shape, for example. . It is necessary to change the shape of the first case body 114 in accordance with the shape change of the first to third lenses 111 to 113.
  • the liquid crystal display device according to the present invention is applied to a vehicle-mounted head-up display device.
  • the liquid crystal display device is not limited to a vehicle-mounted device, but may be applied to a head-up display device mounted on a vehicle such as an airplane or a ship. Good.
  • the projection member is not limited to the windshield, and may be a dedicated combiner.
  • the liquid crystal display device according to the present invention may be applied not to a head-up display device but to a liquid crystal display device such as a projector used indoors or outdoors.
  • the projection member is not limited to a light-transmitting member, and may be a reflective screen or the like.
  • the liquid crystal display device according to the present invention may be mounted on a glasses-type wearable terminal.
  • the present invention is suitable for a liquid crystal display device mounted on a head-up display device.
  • Head-up display device 110
  • Display unit 111
  • First lens (first optical element) 111a Convex lens portion 112
  • Second lens (second optical element) 112a, 112b Convex lens portion 112i Entrance surface 112o Exit surface 113
  • Third lens (third optical element) 113i Incident surface 113o Ejection surface 114
  • First case body 115
  • Second case body 117
  • Light diffusion member 118
  • Liquid crystal display panel 118
  • Light source 120
  • Concave mirror (reflection mirror) 201
  • Windshield (projection member) Lo display light V virtual image

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Abstract

L'invention concerne un dispositif d'affichage à cristaux liquides, susceptible de supprimer une augmentation de coût tout en maintenant l'efficacité de rayonnement de lumière sur un boîtier oculaire. Le dispositif d'affichage à cristaux liquides comprend : des sources de lumière (119) qui émettent une pluralité de faisceaux lumineux ; une première lentille (111) qui collimate sensiblement la pluralité de faisceaux lumineux ; une deuxième lentille (112) qui diffuse la pluralité de faisceaux lumineux sensiblement collimatés dans une première direction qui est perpendiculaire à la direction de déplacement des faisceaux lumineux sensiblement collimatés et dans une seconde direction qui est perpendiculaire à la direction de déplacement et qui est perpendiculaire à la première direction ; une troisième lentille (113) qui règle les angles des faisceaux lumineux émis depuis la deuxième lentille (112) ; et un panneau d'affichage à cristaux liquides (118) qui émet une lumière d'affichage Lo correspondant à une image sur la base de la pluralité de faisceaux lumineux qui sont passés à travers les première à troisième lentilles (111) à (113).
PCT/JP2016/066884 2015-06-24 2016-06-07 Dispositif d'affichage à cristaux liquides WO2016208378A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018197074A (ja) * 2017-05-24 2018-12-13 日本精機株式会社 ヘッドアップディスプレイ装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017203871A1 (fr) * 2016-05-25 2017-11-30 株式会社デンソー Dispositif d'affichage tête haute et unité de projection d'image
JP6579126B2 (ja) 2016-05-25 2019-09-25 株式会社デンソー ヘッドアップディスプレイ装置及び画像投射ユニット
JPWO2018139157A1 (ja) * 2017-01-27 2019-11-14 林テレンプ株式会社 照明装置およびヘッドアップディスプレイ装置
KR102261454B1 (ko) * 2017-06-08 2021-06-07 현대모비스 주식회사 차량용 헤드업 디스플레이 장치
KR102311183B1 (ko) * 2017-06-22 2021-10-12 현대모비스 주식회사 차량용 헤드업 디스플레이 장치
JP6711337B2 (ja) 2017-09-07 2020-06-17 株式会社デンソー ヘッドアップディスプレイ装置及び画像投射ユニット
US11226488B2 (en) * 2018-03-21 2022-01-18 Nippon Seiki Co., Ltd. Head-up display
JP7301880B2 (ja) * 2018-05-04 2023-07-03 ハーマン インターナショナル インダストリーズ インコーポレイテッド ミラーレスヘッドアップディスプレイ
JP2020020955A (ja) * 2018-07-31 2020-02-06 パナソニックＩｐマネジメント株式会社 照明システム、表示システム、及び移動体
JP7225272B2 (ja) 2021-01-12 2023-02-20 矢崎総業株式会社 車両用表示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09237512A (ja) * 1996-02-29 1997-09-09 Casio Comput Co Ltd 光源装置
JPH11202129A (ja) * 1998-01-12 1999-07-30 Sony Corp 偏光変換素子および投射型液晶表示装置
WO2012132579A1 (fr) * 2011-03-25 2012-10-04 日本精機株式会社 Dispositif d'affichage tête haute

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09237512A (ja) * 1996-02-29 1997-09-09 Casio Comput Co Ltd 光源装置
JPH11202129A (ja) * 1998-01-12 1999-07-30 Sony Corp 偏光変換素子および投射型液晶表示装置
WO2012132579A1 (fr) * 2011-03-25 2012-10-04 日本精機株式会社 Dispositif d'affichage tête haute

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018197074A (ja) * 2017-05-24 2018-12-13 日本精機株式会社 ヘッドアップディスプレイ装置

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