WO2018131684A1 - Écran transparent, plaque stratifiée de vidéoprojection, système d'affichage vidéo et procédé de fabrication d'écran transparent - Google Patents

Écran transparent, plaque stratifiée de vidéoprojection, système d'affichage vidéo et procédé de fabrication d'écran transparent Download PDF

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Publication number
WO2018131684A1
WO2018131684A1 PCT/JP2018/000682 JP2018000682W WO2018131684A1 WO 2018131684 A1 WO2018131684 A1 WO 2018131684A1 JP 2018000682 W JP2018000682 W JP 2018000682W WO 2018131684 A1 WO2018131684 A1 WO 2018131684A1
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WIPO (PCT)
Prior art keywords
transparent
layer
transparent screen
reflective
slope
Prior art date
Application number
PCT/JP2018/000682
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English (en)
Japanese (ja)
Inventor
恒生 一松
幸宏 垰
成紀 山田
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旭硝子株式会社
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Publication of WO2018131684A1 publication Critical patent/WO2018131684A1/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
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • 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
    • G03B21/14—Details
    • 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
    • G03B21/625—Lenticular translucent screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the direction in which a hot spot is observed is the same as the direction in which a bright image is observed.
  • the direction in which the hot spot is observed and the direction in which the brightness of the image is the brightest can be separated.
  • FIG. 12 is a diagram illustrating an example of steps for forming a plurality of inclined surfaces in a striped pattern in the first transparent layer.
  • FIG. 13 is a diagram illustrating an example of steps for forming irregularities on the slope of the first transparent layer.
  • FIG. 14 is a diagram illustrating an example of steps for forming the reflective layer.
  • FIG. 15 is a diagram illustrating an example of a step of forming the second transparent layer. It is a figure which shows the video display system by a modification. It is a figure which shows the conventional transparent screen.
  • FIG. 18A is a semilogarithmic graph showing the luminance characteristics of the image projection laminated board according to Example 1.
  • FIG. FIG. 18B is a linear graph illustrating the luminance characteristics of the image projection laminated plate according to the first example.
  • FIG. 19A is a semilogarithmic graph showing the luminance characteristics of the image projection laminated board according to Example 2.
  • FIG. 19B is a linear graph showing luminance characteristics of the image projection laminated plate according to the second example.
  • FIG. 20A is a semilogarithmic graph showing the luminance characteristics of the image projection laminated board according to Example 3.
  • FIG. 20B is a linear graph illustrating the luminance characteristics of the image projection laminated plate according to the third example.
  • FIG. 21A is a semilogarithmic graph showing the luminance characteristics of the image projection laminated board according to Comparative Example 1.
  • FIG. 21B is a linear graph showing luminance characteristics of the image projection laminated plate according to Comparative Example 1.
  • FIG. 22A is a semilogarithmic graph showing the luminance characteristics of the image projection laminated plate according to Comparative Example 2.
  • FIG. 22B is a linear graph showing the luminance characteristics of the image projection laminated board according to Comparative Example 2.
  • FIG. 1 is a diagram illustrating a video display system according to an embodiment. In FIG. 1, the structure of the transparent screen 20 is shown enlarged.
  • the video display system 10 includes a video projection matching plate 11 that can visually recognize the background, and a projector 12 that projects a video on the video projection matching plate 11.
  • a general projector is used as the projector 12.
  • the video projection matching plate 11 displays a video projected from the front to the front user 13 and makes the front user 13 visually recognize the back background.
  • the background behind the screen may be visible when the image is not projected, and may be visible or not visible when the image is projected.
  • the video projection matching plate 11 has a video projection surface 11a in contact with the atmosphere.
  • a hot spot is generated by the regular reflection of the incident light IL on the image projection surface 11a and the surface in contact with the air on the opposite side.
  • the hot spot is observed at a position in the regular reflection direction (for example, the position of the user 14 indicated by a broken line) and is not observed at other positions (for example, the position of the user 13 indicated by a solid line).
  • the use of the image projection laminated board 11 is not particularly limited, but for example, a window plate of a vehicle such as an automobile or a train, a window plate of a building, a window plate of a show window, a window plate of a refrigerated showcase, an interior of a vehicle or a building For example, a partition that separates the rooms.
  • the image projection alignment plate 11 includes a transparent screen 20, a first transparent plate 21 provided on one side (for example, the rear side) of the transparent screen 20, and a second transparent plate provided on the opposite side (for example, the front side) of the transparent screen 20. Plate 22.
  • Examples of glass of the glass plate include soda lime glass, aluminosilicate glass, alkali-free glass, and borosilicate glass.
  • the glass may be either untempered glass or tempered glass. Untempered glass is obtained by forming molten glass into a plate shape and slowly cooling it. Examples of the molding method include a float method and a fusion method.
  • the tempered glass may be either physically tempered glass or chemically tempered glass. Physically tempered glass strengthens the glass surface by rapidly cooling a uniformly heated glass plate from a temperature near the softening point and generating a compressive stress on the glass surface due to the temperature difference between the glass surface and the inside of the glass. . Chemically tempered glass is obtained by strengthening the glass surface by generating a compressive stress on the glass surface by an ion exchange method or the like.
  • the transparent screen 20 may not have flexibility, but may have flexibility so that it can be deformed into various shapes.
  • FIG. 2 is a diagram showing a transparent screen according to an embodiment.
  • the transparent screen 20 includes a base sheet 31, a first transparent layer 32, a reflective layer 34, a second transparent layer 35, a protective sheet 36, and the like in this order from the rear side to the front side.
  • the first transparent layer 32 is formed on the surface of the base sheet 31 and has irregularities on the surface opposite to the base sheet 31.
  • the first transparent layer 32 is made of, for example, a transparent resin.
  • the resin may be any of a photocurable resin, a thermoplastic resin, and a thermosetting resin, and is formed by, for example, an imprint method.
  • the reflective layer 34 is formed in a zigzag shape along the irregularities on the surface of the first transparent layer 32.
  • the reflection layer 34 has projections and depressions on the front surface thereof, and displays an image by diffusely reflecting the image light projected from the front.
  • the reflective layer 34 allows the background to be visually recognized by transmitting a part of the light from the rear to the front.
  • the irregularities are preferably irregular irregularities.
  • the first transparent layer 32 is formed in a sawtooth shape in a sectional view.
  • the first transparent layer 32 has a plurality of inclined surfaces 42 that are inclined in the same direction with respect to the reference surface 41 when the surface 41 of the first transparent layer 32 opposite to the reflective layer 34 is the reference surface 41.
  • Each inclined surface 42 is inclined so as to be separated from the reference surface 41 from one end (for example, the lower end) toward the other end (for example, the upper end).
  • the plurality of slopes 42 are formed in stripes when viewed from the normal direction of the reference surface 41.
  • the stripe line may be a straight line or a curved line.
  • the inclination angle of each inclined surface may have a distribution within about ⁇ 30% with respect to the average value of the inclination angles of the plurality of inclined surfaces as long as the inclination direction is the same with respect to the reference surface 41.
  • the distribution refers to a graph of the plurality of slopes 42 in which the horizontal axis represents the inclination angle and the vertical axis represents the count number.
  • the width W of the slope 42 may have a distribution within about ⁇ 30% with respect to the average value of the width W of each slope 42.
  • the distribution refers to a graph of the width W of the slope 42 in which the horizontal axis is the width and the vertical axis is the count number.
  • the inclination angle ⁇ of the inclined surface 42 is, for example, 2 ° or more and 45 ° or less, and preferably 5 ° or more and 20 ° or less.
  • the inclination angle ⁇ of the inclined surface 42 is measured in a cross section perpendicular to the y direction (for example, the cross section shown in FIG. 2).
  • the inclination angle ⁇ of the inclined surface 42 is 0 ° when the inclined surface 42 is parallel to the reference surface 41, and 90 ° when the inclined surface 42 is perpendicular to the reference surface 41.
  • the matrix 38 includes at least one of an inorganic material and an organic material.
  • the inorganic material include silicon dioxide, titanium oxide, zirconia oxide, and sodium silicate.
  • the organic material include polyvinyl alcohol resin, polyvinyl butyral resin, epoxy resin, acrylic resin, polyester resin, polycarbonate resin, melamine resin, polyurethane resin, urethane acrylate resin, and silicone resin.
  • the organic material may be a thermosetting resin, a photocurable resin, or a thermoplastic resin.
  • the ratio of the particles 37 in the uneven layer 33 is, for example, 1% or more and 80% or less, preferably 5% or more and 60% or less.
  • the height difference h between the adjacent convex portion 33a and the concave portion 33b is, for example, 1/3 or less of the height difference H of the slope 42.
  • the height difference h between the adjacent convex portion 33a and concave portion 33b is measured in a direction perpendicular to the slope 42 in a cross section perpendicular to the y direction.
  • the interval w between the plurality of adjacent convex portions 33a is 1/3 or less of the dimension (W / cos ⁇ ) in the inclination direction of the inclined surface 42.
  • the interval w between the plurality of adjacent convex portions 33a is measured in a direction parallel to the slope 42 in a cross section perpendicular to the y direction.
  • the interval w between the plurality of adjacent convex portions 33a can be adjusted, for example, by controlling the particle size or particle size distribution of the particles 37, the volume ratio of the particles 37 and the matrix 38, the charging state of the particles 37, or the like.
  • regularity can be easily obtained when the particle size variation of the particles 37 is reduced, and regularity is lost when the particle size variation of the particles 37 is increased, thereby forming random irregularities. it can. Further, by making the total volume of the particles 37 smaller than the volume of the matrix 38, random irregularities can be formed. In particular, the regularity can be reduced by setting the volume of the particles 37 to 100% or less of the volume of the matrix 38.
  • the light scattering direction can be easily aligned, so that the luminance can be further increased.
  • Each reflecting slope 45 extends linearly in the y direction, and is displaced from one side in the x direction to the opposite side in the x direction as it goes from one end in the z direction to the other end in the z direction (for example, as it goes in the negative Z direction).
  • the inclination angle of the reflective slope 45 can be represented by the inclination angle ⁇ of the slope 42, and is 2 ° or more and 45 ° or less.
  • the inclination angle of the reflective slope 45 is measured in a cross section perpendicular to the y direction.
  • the inclination angle of the reflective slope 45 is 0 ° when the reflective slope 45 is parallel to the reference plane 41, and 90 ° when the reflective slope 45 is perpendicular to the reference plane 41.
  • the inclination angle of the reflective slope 45 is set based on the positional relationship between the projector 12, the user 13, and the transparent screen 20, the refractive index of the transparent screen 20, and the like.
  • the reason why the refractive index of the transparent screen 20 is taken into account is that the incident light IL and the reflected light RL are refracted at the boundary between the transparent screen 20 and the atmosphere.
  • the width of the reflective slope 45 can be represented by the width W of the slope 42, and is 10 ⁇ m or more and 500 ⁇ m or less.
  • the width of the reflective slope 45 is the dimension of the reflective slope 45 in the z direction in a cross section perpendicular to the y direction.
  • the width W is preferably 15 to 400 ⁇ m, more preferably 20 to 150 ⁇ m.
  • the width W is 500 ⁇ m or less, it is possible to prevent the reflective slope from being seen by an observer.
  • the width W is 10 ⁇ m or more, it is easy to process the reflective slope.
  • the height difference of the reflective slope 45 can be represented by the height difference H of the slope 42, and is 2 ⁇ m or more and 500 ⁇ m or less.
  • the difference in height of the reflective slope 45 is the dimension of the reflective slope 45 in the x direction in a cross section perpendicular to the y direction.
  • the height difference H is preferably 2 to 100 ⁇ m, more preferably 2 to 50 ⁇ m.
  • a step surface 46 connecting the plurality of adjacent reflecting slopes 45 is formed between the plurality of adjacent reflecting slopes 45.
  • the step surface 46 is perpendicular to the reference surface 41 in FIG. 2, but may be inclined.
  • a parallel surface parallel to the reference surface 41 may be formed between the plurality of adjacent reflective inclined surfaces 45.
  • the reflective inclined surface 45 has irregularities, and has a structure in which convex portions 45a and concave portions 45b are alternately arranged in a cross section perpendicular to the y direction.
  • the “surface roughness Ra” is an arithmetic average roughness described in Japanese Industrial Standard (JIS B0601).
  • the surface roughness Ra of the reflective slope 45 is measured in the y direction.
  • the arithmetic mean roughness Ra of the reflective slope 45 is not in the z direction but in the y direction so that noise does not occur due to the first transparent layer 32 being formed in a sawtooth shape in a cross section perpendicular to the y direction. taking measurement.
  • Ra is preferably 0.03 ⁇ m to 5 ⁇ m, more preferably 0.05 ⁇ m to 3 ⁇ m.
  • the interval between the plurality of adjacent convex portions 45a can be represented by the interval w between the plurality of adjacent convex portions 33a, and is 1/3 or less of the dimension (W / cos ⁇ ) in the inclination direction of the reflective inclined surface 45.
  • the interval between the plurality of adjacent convex portions 45a is measured in a direction parallel to the least square line of the reflecting slope 45 in a cross section perpendicular to the y direction.
  • the reflective layer 34 of the present embodiment is inclined in the same direction with respect to the reference plane 41 and has a plurality of reflective inclined surfaces 45 that reflect the light of the projected image.
  • the plurality of reflective inclined surfaces 45 are formed in a stripe shape when viewed from the normal direction of the reference surface 41.
  • Each reflective slope 45 has irregularities and displays an image. Therefore, the reflective inclined surface 45 that displays the image is inclined with respect to the image projection surface 11a that generates the hot spot.
  • the direction in which a bright image is observed is the regular reflection direction of the reflecting slope 45
  • the direction in which the hot spot is observed is the regular reflection direction of the image projection surface 11a.
  • the direction in which the hot spot is observed and the direction in which the bright image is observed can be separated, and the position where the bright image is observed without observing the hot spot (for example, the position of the user 13 indicated by a solid line in FIG. 1). Can produce.
  • the luminance reaches the maximum value when the incident angle ⁇ 1 is 0 °, so the direction in which the hot spot is observed and the direction in which the bright image is observed are separated. I understand that I can't.
  • the luminance becomes the maximum value when the incident angle ⁇ 1 is 45 °, so that the direction in which the hot spot is observed and the direction in which the bright image is observed can be separated. Recognize.
  • FIG. 5 is a diagram showing an example of a measuring apparatus that measures the relationship between the outgoing angle of reflected light and the brightness of the transparent screen while keeping the incident angle of incident light constant.
  • the luminance meter 51 is fixed.
  • the projector 12 can turn along the arcuate path 52 so that the emission angle ⁇ 2 of the reflected light RL can be changed.
  • the transparent screen 20 is rotated simultaneously with the turning of the projector 12 so that the incident angle ⁇ 1 (see FIG. 3) of the incident light IL is maintained constant (for example, ⁇ 45 °).
  • the full width at half maximum ⁇ (see FIG. 6) of the reflected light RL of the transparent screen 20 is preferably at least twice the angle of view ⁇ of the projector 12 (see FIG. 7).
  • the intensity of incident light is uniform in the display area of the transparent screen 20, the difference between the maximum value and the minimum value of the luminance can be suppressed to half or less of the maximum value.
  • the angle of view ⁇ of the projector 12 is defined by two straight lines L1 and L2 that connect both ends P1 and P2 of the image I displayed on the transparent screen 20 and the center P3 of the lens of the projector 12. This is the angle formed by Both ends P1 and P2 of the image I are set so that the line connecting the both ends P1 and P2 passes through the center of the image I and is parallel to the stripes of the reflective slope 45.
  • FIG. 8 is a diagram illustrating an example of a positional relationship between the transparent screen of the video projection matching plate, the projector, and the user as viewed from the front of the vehicle.
  • the image projection matching plate 11 is attached to a window at the front of the vehicle.
  • the transparent screen 20 is provided in the lower part of the window.
  • the projector 12 is provided below the window.
  • the eyes of the user 13 are located at the center in the vertical direction of the window.
  • the plurality of reflective inclined surfaces 45 may form elongated horizontal stripes in the horizontal direction. The user 13 can observe a bright image at a position where the hot spot is not observed.
  • FIG. 9 is a diagram showing another example of the positional relationship between the transparent screen of the image projection laminated board, the projector, and the user as seen from the front of the vehicle.
  • the image projection matching plate 11 is attached to a window at the front of the vehicle.
  • the transparent screen 20 is provided in the upper part of the window.
  • the projector 12 is provided below the window.
  • the eyes of the user 13 are located at the center in the vertical direction of the window. Also in this case, as shown in FIG. 9, the plurality of reflective inclined surfaces 45 may form elongated horizontal stripes in the horizontal direction. The user 13 can observe a bright image at a position where the hot spot is not observed.
  • FIG. 11 is a flowchart illustrating a method for manufacturing a transparent screen according to an embodiment.
  • the method for manufacturing a transparent screen includes a step S101 of forming a plurality of inclined surfaces 42 inclined in the same direction with respect to the reference surface 41 in the first transparent layer 32, and a step S101 of the plurality of inclined surfaces 42.
  • Each includes step S102 for forming irregularities, step S103 for forming the reflective layer 34 in contact with the irregularities, and step S104 for forming the second transparent layer 35 that fills the irregularities of the reflective layer 34.
  • the embossing method is a method of transferring the concave / convex pattern of the mold 60 to the first transparent layer 32.
  • the embossing method includes an imprint method.
  • the imprint method is a method in which a resin material to be the first transparent layer 32 is sandwiched between the mold 60 and the base sheet 31, the uneven pattern of the mold 60 is transferred to the resin material, and the resin material is solidified.
  • the cutting method is a method of cutting the first transparent layer 32 with a cutting tool.
  • the cutting tool may be a common one.
  • FIG. 13 is a diagram illustrating an example of a step of forming irregularities on the slope of the first transparent layer (step S102).
  • a spray method is used as a method for forming irregularities on the slope 42.
  • the spray method is a method of forming the uneven layer 33 by spraying a coating liquid onto the slope 42 and solidifying the sprayed liquid.
  • the coating liquid includes particles 37 and a matrix 38, and may further include a solvent that dissolves the matrix 38.
  • the uneven layer 33 forms unevenness on the slope 42.
  • the spray method is suitable for forming the uneven layer 33 having a large area and a uniform area as compared with the spin coating method.
  • a film forming method may be used in which the coating liquid is applied to the inclined surface 42 and the coating film of the coating liquid is dried and solidified.
  • a film forming method a spin coating method, a gravure coating method, or the like may be used.
  • FIG. 14 is a diagram illustrating an example of steps for forming a reflective layer.
  • a method for forming the reflective layer 34 for example, a vacuum deposition method or a sputtering method is used.
  • the reflective layer 34 is formed along the unevenness of the uneven layer 33.
  • FIG. 15 is a diagram illustrating an example of steps for forming the second transparent layer.
  • the second transparent layer 35 is obtained by sandwiching and solidifying a resin material to be the second transparent layer 35 between the reflective layer 34 and the protective sheet 36.
  • FIG. 16 is a diagram showing a video display system according to a modification.
  • the video display system 10A of this modification is different from the video display system 10 of the above embodiment in that it includes a transparent screen 20A.
  • the difference will be mainly described.
  • the first transparent layer 32A has a plurality of inclined surfaces 42A inclined in the same direction with respect to the reference surface 41A.
  • Each inclined surface 42A is inclined so as to be away from the reference surface 41A from one end (for example, the lower end) toward the other end (for example, the upper end).
  • the plurality of inclined surfaces 42A are formed in a stripe shape when viewed from the normal direction of the reference surface 41A.
  • Each slope 42A has irregularities.
  • an etching method or an imprint method is used as a method for forming irregularities on the inclined surface 42A.
  • the etching method is a method of forming irregularities on the slope 42A by etching the slope 42A formed by a stamping method or a cutting method.
  • the etching method may be either a physical etching method or a chemical etching method.
  • the physical etching method includes a blast method.
  • the blast method may be either a drive blast method or a wet blast method.
  • irregularities are formed on the slope 42A by spraying particles onto the slope 42A.
  • the particles for example, alumina particles, silicon carbide particles, zircon particles and the like are used.
  • the wet blast method irregularities are formed on the slope 42A by spraying a mixed fluid of particles and liquid onto the slope 42A.
  • the reflective layer 34A is inclined in the same direction with respect to the reference surface 41A, and has a plurality of reflective inclined surfaces 45A that reflect the light of the projected image.
  • Each reflective inclined surface 45A is inclined so as to be away from the reference surface 41A from one end (for example, the lower end) to the other end (for example, the upper end).
  • the plurality of reflective inclined surfaces 45A are formed in a stripe shape when viewed from the normal direction of the reference surface 41A.
  • the reflective layer 34A has a thickness of, for example, 5 nm or more and 5000 nm or less, and is formed along the unevenness of the inclined surface 42A. Therefore, each reflective slope 45A has irregularities. The unevenness of the reflective layer 34A is filled with the second transparent layer 35A.
  • the reflective inclined surface 45A for displaying an image is inclined with respect to the image projection surface 11Aa that generates a hot spot.
  • the direction in which the hot spot is observed and the direction in which the bright image is observed can be separated, and the position where the bright image is observed without observing the hot spot (for example, the position of the user 13 shown in FIG. 16). Can be produced.
  • a resin layer is used as the first transparent layers 32 and 32A, but a glass layer may be used.
  • a stamping method is used as a method for forming a plurality of slopes in the glass layer in a striped pattern.
  • the embossing method is a method of transferring a concave / convex pattern of a mold onto a glass layer softened at a high temperature.
  • the first transparent plate 21 may be used as the first transparent layers 32 and 32A.
  • bending and stamping may be performed simultaneously by press molding.
  • the uneven layer 33 and the reflective layer 34 are formed on the first transparent plate 21.
  • the first transparent plate 21 is used as the first transparent layer 32 ⁇ / b> A
  • the reflective layer 34 ⁇ / b> A is formed on the first transparent plate 21.
  • the second adhesive layer 24 may be used as the second transparent layers 35 and 35 ⁇ / b> A, and the second transparent plate 22 may be used instead of the protective sheet 36.
  • a transparent resin material having a ring structure and / or a polyfunctional group may be used as the second transparent layers 35 and 35A.
  • the transparent resin material since the rigidity and hardness can be imparted to the transparent layer, the handleability of the transparent screen 20 is improved, which is preferable.
  • a transparent resin material containing 10% or more of one or more structures selected from an adamantane skeleton, a tricyclodecane skeleton, and a fluorene skeleton is preferably used.
  • the transparent resin material which provided the hard-coat layer and the anti-reflective film on PET resin as the 2nd transparent layers 35 and 35A. Furthermore, you may provide the half mirror for virtual image formation of a head-up display on PET resin.
  • the transparent resin material having sufficient surface hardness and transparency as described above is used as the second transparent layer 35, 35A
  • the second transparent layer 35, 35A made of the transparent resin material is used for the transparent screen 20.
  • a configuration in which the protective sheet 36, the second adhesive layer 24, and the second transparent plate 22 are not provided may be provided in the outermost layer.
  • the step of forming the plurality of inclined surfaces 42 in a striped pattern and the step of forming irregularities on the inclined surfaces 42 are performed in this order, but may be performed simultaneously.
  • the uneven pattern surface of the die 60 is roughened by an etching method in advance, it can be performed simultaneously.
  • Example 1 the transparent screen 20A shown in FIG. 16 was produced by the following method.
  • a PET film having a thickness of 0.075 mm was prepared as the base sheet 31 and the protective sheet 36. Further, as the mold 60, a mold (made of nickel chrome) having a plurality of sawtooth-like slopes in cross section on the surface facing the PET film is used, and laser ablation is performed to form unevenness on the slopes. Carried out. In the mold to be the mold 60, when the surface opposite to the surface facing the PET film is a reference surface, all the inclined surfaces are inclined in the same direction at the same angle with respect to the reference surface. When viewed from the normal direction, the slope was striped.
  • the first transparent layer 32A had an inclination angle ⁇ of 14 °, a width W of about 40 ⁇ m, and a height difference H of about 10 ⁇ m, and had a saw-shaped slope in cross-sectional view.
  • Ra of the slope 42A was 0.39 ⁇ m.
  • a coating solution containing an adhesive layer resin and a diluting solvent was placed on the reflective layer 34A by a die coating method.
  • the resin for the adhesion layer was a cycloolefin resin.
  • the thickness of the adhesion layer was 1.5 ⁇ m.
  • a second transparent layer precursor containing a UV curable resin type acrylic resin is applied on the reflective layer 34A on which the adhesion layer is formed by a die coating method.
  • a layer was obtained.
  • a PET film having a thickness of 0.075 mm is stacked as the protective sheet 36, and in this state, 1000 mJ UV light is applied from the PET film side to the second transparent layer precursor with reference to the second transparent layer precursor layer.
  • the layer was irradiated to cure the UV curable resin type acrylic resin in the second transparent layer precursor layer to form the second transparent layer 35A.
  • a transparent screen 20A was obtained.
  • the image projection laminated plate 11A shown in FIG. 16 was produced using the transparent screen 20A by the following method.
  • first transparent plate 21 and the second transparent plate 22 2 mm thick soda lime glass was prepared as the first transparent plate 21 and the second transparent plate 22. Further, as the first adhesive layer 23 and the second adhesive layer 24, PVB films having a thickness of 30 mil (thickness of about 750 ⁇ m) were prepared.
  • Example 2 The transparent screen 20 shown in FIG. 1 was created by the following method.
  • the mold 60 a mold (made of nickel chrome) in which a plurality of sawtooth-like inclined surfaces having the same cross-sectional view as in Example 1 was formed was used in a state where unevenness formation by laser ablation was not performed.
  • the mold to be the mold 60 when the surface opposite to the surface facing the PET film is a reference surface, all the inclined surfaces are inclined in the same direction at the same angle with respect to the reference surface. When viewed from the normal direction, the slope was striped.
  • the 1st transparent layer 32 was formed on the 1st substrate sheet 31 (PET film) like Example 1 except having used the metallic mold in the state where unevenness formation is not performed as type 60.
  • the first transparent layer 32 had an inclination angle ⁇ of 14 °, a width W of about 40 ⁇ m, and a height difference H of about 10 ⁇ m, and had a saw-shaped slope in cross-sectional view.
  • a spray liquid for forming an uneven layer on the first transparent layer 32 was prepared.
  • a dispersion liquid silica particles: 20 wt%, acrylic monomer: 40 wt%, PGMEA solvent: 40 wt% in which silica particles having an average particle diameter of 1.6 ⁇ m are dispersed in an acrylic resin composition
  • MEK is added as a dilution solvent.
  • spray coating was performed on the first transparent layer 32. After coating, the substrate was dried in an oven at 80 ° C. for 5 minutes, and then irradiated with 1000 mJ of UV light to cure the acrylic resin containing the silica particles, thereby forming an uneven layer.
  • the thickness of the uneven layer 33 was 3 ⁇ m, and its Ra was 0.33 ⁇ m.
  • the transparent screen 20A shown in FIG. 16 was created by the following method.
  • a mold made of nickel chrome in which a plurality of sawtooth-like inclined surfaces having the same cross-sectional view as in Example 1 was formed was used in a state where unevenness formation by laser ablation was not performed.
  • the mold to be the mold 60 when the surface opposite to the surface facing the PET film is a reference surface, all the inclined surfaces are inclined in the same direction at the same angle with respect to the reference surface. When viewed from the normal direction, the slope was striped.
  • a mixed liquid mixed with ultrapure water so that the content of alumina particles having an average particle diameter of 3 ⁇ m is 13 wt% is prepared as a blast liquid, and is sprayed on the first transparent layer 32A having the slope 42A. Then, irregularities were formed on the slope 42A by a physical etching method using wet blasting. Ra of the slope 42A after the blast treatment was 0.11 ⁇ m.
  • the reflective layer 34A was a layer made of Al, and its thickness was 15 nm.
  • Comparative Example 1 In Comparative Example 1, the first transparent layer 132 was formed on the first base sheet in the same manner as in Example 1 except that a sand blast film in which random irregularities were formed on a flat surface by sand blasting was used as the mold 60. (See FIG. 17). Ra of the surface of the first transparent layer 132 to which the unevenness was transferred was about 0.2 ⁇ m. Then, the process similar to Example 1 was implemented and the transparent screen 120 shown in FIG. 17 was obtained. Thereafter, using the transparent screen 120, an image projection laminated plate was produced in the same manner as in Example 1.
  • the horizontal axis represents the emission angle ⁇ 2 of the reflected light RL
  • the vertical axis represents the value Y ′ obtained by dividing the measured value Y (cd / m 2 ) of the luminance meter 51 by the maximum value.
  • Y 'shown in these figures removes the component reflected in the front surface of the transparent screen.
  • the emission angle ⁇ 2 is 0 ° (that is, when the luminance meter 51 is located in front of the image projection laminated plate)
  • the luminance becomes the maximum value. It was. Therefore, it was found that the direction in which the hot spot is observed and the direction in which the bright image is observed can be separated.
  • Comparative Example 1 As shown in FIG. 21, when the exit angle ⁇ 2 is the same value as the incident angle ⁇ 1 (for example, ⁇ 45 °), the luminance becomes the maximum value. Therefore, it was found that the direction in which the hot spot is observed and the direction in which the bright image is observed cannot be separated. In Comparative Example 2, bright lines were generated in a line shape, and no image was seen. According to Comparative Example 2, as shown in FIG. 22, when the emission angle ⁇ 2 is 0 ° (that is, when the luminance meter 51 is located in front of the image projection laminated plate), the luminance becomes the maximum value. Therefore, it was found that the direction in which the hot spot is observed and the direction in which the bright image is observed can be separated.
  • the emission angle ⁇ 2 when the emission angle ⁇ 2 is 0 ° (that is, when the luminance meter 51 is located in front of the image projection laminated plate), the luminance becomes the maximum value. Therefore, it was found that the direction in which the hot spot is observed and the direction in which the bright image
  • Table 1 shows experimental conditions and experimental results.
  • “A” means that the direction in which the hot spot is observed can be separated from the direction in which the bright image is observed
  • B means that the direction in which the hot spot is observed is bright. This means that the direction in which the image is observed could not be separated.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Projection Apparatus (AREA)
  • Instrument Panels (AREA)

Abstract

L'invention concerne un écran transparent comprenant une première couche transparente, une couche réfléchissante qui réfléchit la lumière de la vidéo projetée, et une deuxième couche transparente disposée sur le côté opposé à la première couche transparente avec la couche réfléchissante comme référence, et permet à un arrière-plan d'être reconnaissable visuellement. Lorsqu'une surface sur le côté opposé à la couche réfléchissante de la première couche transparente est définie en tant que plan de référence, la couche réfléchissante possède une pluralité de plans inclinés réfléchissants qui sont inclinés dans la même direction par rapport au plan de référence et réfléchissent la lumière, et la pluralité de plans inclinés réfléchissants comportent chacun des renfoncements et des saillies et sont formés dans un motif en bande lorsqu'ils sont vus depuis la direction normale du plan de référence.
PCT/JP2018/000682 2017-01-13 2018-01-12 Écran transparent, plaque stratifiée de vidéoprojection, système d'affichage vidéo et procédé de fabrication d'écran transparent WO2018131684A1 (fr)

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JP2017004308A JP2020038236A (ja) 2017-01-13 2017-01-13 透明スクリーン、映像投影合わせ板、映像表示システム、および透明スクリーンの製造方法

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CN113433788B (zh) * 2021-07-09 2023-07-28 广西中光影光电有限公司 正投透明全息投影屏幕

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JP2010539525A (ja) * 2007-09-10 2010-12-16 マイクロビジョン，インク． 透過性の特性を備えている、埋設された開口数拡大器
JP2014013369A (ja) * 2012-06-06 2014-01-23 Dainippon Printing Co Ltd スクリーン、及びスクリーンの製造方法
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