WO2006062123A1 - 反射型スクリーン - Google Patents
反射型スクリーン Download PDFInfo
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- WO2006062123A1 WO2006062123A1 PCT/JP2005/022446 JP2005022446W WO2006062123A1 WO 2006062123 A1 WO2006062123 A1 WO 2006062123A1 JP 2005022446 W JP2005022446 W JP 2005022446W WO 2006062123 A1 WO2006062123 A1 WO 2006062123A1
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- Prior art keywords
- light
- wavelength region
- reflective
- reflective layer
- layer
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0808—Mirrors having a single reflecting layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
- G02B5/0825—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only
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- 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
Definitions
- the present invention relates to a projector-type reflective screen that reflects and projects a projected image, and in particular, can project a high-contrast image in a projection in a bright environment, and has an oblique positional force on the screen.
- the present invention relates to a reflective screen that can project an image with little color change when viewed.
- a two-layer reflective screen having a reflective layer for reflecting the light of the projector and a light diffusion layer for diffusing the reflected light It has been known.
- a reflective layer having a substantially constant reflectivity regardless of the wavelength with respect to visible light such as an aluminum vapor deposition layer or an aluminum paste coating layer, is used as the reflective layer.
- a reflective screen capable of projecting a high-contrast image even in a bright environment
- a reflective layer for selectively reflecting light of a specific wavelength on a light-absorbing substrate
- a structure in which a light diffusion layer for diffusing reflected light is sequentially formed has been proposed (Patent Documents 1 and 2).
- Such a reflective screen uses a reflective layer to emit only the three primary colors constituting the projector image, that is, light in the three primary color wavelength regions of blue (B), green (G), and red (R).
- B blue
- G green
- R red
- the reflective layer of such a reflective screen uses an optical multilayer film that selectively reflects light of a specific wavelength by the interference of light. Blue, green, Designed to reflect light in the red wavelength region.
- the reflected light shifts in the wavelength region to the short wavelength side compared to the reflected light of the light incident on the front force. Due to the nature of the reflective layer, even if the incident light is such that the reflected light becomes white when the frontal force of the screen is incident, the reflected light wavelength is reduced to the short wavelength side when the incident light is incident obliquely. Because of the shift, the bluish light is reflected.
- Patent Document 2 there is a problem in that the reflectance of light in the video color wavelength region is reduced due to the change in the incident angle of the projector video, but the change in the video color that is visible depending on the position of the viewer relative to the screen is completely considered. The image color reproducibility when viewing the screen from an oblique position was not sufficient.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-337381 (Claim 1)
- Patent Document 2 JP 2004-138938 (Claim 1)
- the present invention displays a high contrast image even in a bright environment
- the reflective screen of the present invention uses an optical multilayer film that selectively reflects light in a specific wavelength region by alternately laminating at least two types of transparent dielectric thin films having different refractive indexes as a reflective layer.
- the reflective layer has light reflectivity with respect to light in a wavelength region of blue, green, red and 670 nm to 730 nm, and has an average reflectance of each of the light in the wavelength region. The average reflectance of light outside the wavelength region in the visible wavelength region is higher than V.
- the reflective layer has an average reflectance of each of the light in the wavelength region of blue, green, red, and 670 nm to 730 nm, and an average reflectance of light outside the wavelength region in a visible wavelength region.
- the difference is 10% or more.
- the reflective layer has a maximum reflectance of each of the blue, green, red, and light in a wavelength region of 670 nm to 730 nm, and an average reflectance of light outside the wavelength region in a visible wavelength region. The difference is 25% or more.
- the reflective layer is characterized in that an average reflectance of light in the wavelength region of 670 nm to 730 nm is substantially equal to an average reflectance of light in the wavelength region of red. is there.
- the reflective layer is made of a transparent polymer resin.
- the reflective layer is formed by a multilayer extrusion method.
- the reflective layer includes a first reflective layer having light reflectivity with respect to light in a blue wavelength region and a second reflective layer having light reflectivity with respect to light in a green wavelength region.
- a reflective layer, a third reflective layer having light reflectivity for light in the red wavelength region, and a fourth reflective layer having light reflectivity for light in the wavelength region of 670 nm to 730 nm are stacked. It is characterized by being made.
- a light absorption layer that absorbs light transmitted through the reflection layer is provided on a surface different from the incident surface side of the reflection layer.
- the light absorption layer is a black film.
- a light diffusing member is further provided on an incident surface side of the reflective screen than the reflective layer.
- the light diffusing member has a haze of JIS K7105: 1981 of 60% or more, a total light transmittance of JIS K7361-1: 1997 of 70% or more, and three in the reflection method of JIS Z8722: 2000.
- the stimulus value Y is 10 or less.
- the light diffusing member has at least a light diffusing layer, and the light diffusing layer includes transparent spherical fine particles and a transparent binder having a refractive index different from that of the spherical fine particles.
- the spherical fine particles have an average particle size of L ⁇ to 10 / ⁇ m, and a value obtained by dividing the refractive index of the spherical fine particles by the refractive index of the transparent binder is 0.91 or more and 1.09 or less (provided that 1. (Except 00).
- the reflective screen of the present invention uses an optical multilayer film as a reflective layer that selectively reflects light in a specific wavelength region by alternately laminating at least two transparent dielectric thin films having different refractive indexes. It has light reflectivity for blue, green, red and light in the wavelength range of 670 nm to 730 nm, and the average reflectance of each light in the wavelength range is other than the wavelength range in the visible wavelength range. It is higher than the average reflectance of light.
- blue (B), green (G), and red (R) are the three primary colors of light constituting the projector image, and blue (B: 420 nm to 480 nm, center wavelength 450 nm), green (G: 520 nm to 580 nm, center wavelength 550 nm) and red (R: 590 nm to 650 nm, center wavelength 620 nm).
- the center wavelength is 700 nm, and light in the wavelength range of 670 nm to 730 nm is used. Indicated as red '(R').
- the reflected light (solid line) in the three primary color wavelength regions constituting the projector image is reflected on the reflective layer.
- the reflected light from the diffused projector has a lot of reflected light (dotted line) of ambient light with a large incident angle Mixed. Since the reflection wavelength region of the optical multilayer film (reflection layer) shifts to the short wavelength side for light with a large incident angle, the reflected light of the ambient light becomes reflected light with a strong bluish tint.
- the screen of the present invention has a high reflectivity not only for the three primary color wavelengths of B, G, and R but also for light in the wavelength region of R ', so that Similarly, the light is also reflected by shifting to the short wavelength side to compensate for the red component reflected light (dashed line).
- the screen of the present invention has a high reflectivity not only for the three primary color wavelengths of B, G, and R but also for light in the wavelength region of R ', so that Similarly, the light is also reflected by shifting to the short wavelength side to compensate for the red component reflected light (dashed line).
- the light sensitivity of the light in the R ′ wavelength region is very low, so that the observer can perceive even if the light in this region is reflected. Therefore, there is almost no effect on the color or contrast of the observed image light.
- the reflective layer has light reflectivity with respect to the three primary colors of light constituting the image projected from the projector, that is, the light in the three primary color wavelength regions of B, G, and R and the light in the wavelength region of R ′. That of light in the wavelength region of G, R and R ' The average reflectance of each is higher than the average reflectance of light outside the wavelength region in the visible wavelength region.
- the average reflectance means an average of the reflectance for each wavelength in a specific wavelength range.
- light in the visible wavelength region (wavelength 380 nm to 780 nm) is usually equidistantly equal to or less than lOnm.
- the reflectance measured at 5 nm intervals is used as the average reflectance.
- the average reflectance of light in the wavelength regions of B, G, R, and R ′ can be obtained by averaging the reflectance of light within the wavelength range for each range.
- the average reflectance of light outside the B, G, R, and R 'wavelength regions within the visible wavelength region is the average of the reflectance of light in the visible region excluding the B, G, R, and R' wavelength regions. It is obtained by doing.
- Such a reflective layer is a band-pass filter that reflects light in the B, G, R, and R 'wavelength regions, and is an optical device in which a large number of at least two types of transparent dielectric materials having different refractive indexes are alternately stacked. It consists of a multilayer film.
- the optical multilayer film is a thin film made of an inorganic material such as titanium oxide (TiO 2) or magnesium fluoride (MgF 2).
- the transparent polymer material include polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and the like.
- the combinations having different refractive indices may be selected from those having different material power refractive indices, or may be the same material with the degree of stretching varied and the refractive index varied.
- the reflective layer is preferably formed by a multilayer extrusion method of polymer resin.
- Such an optical multilayer film can obtain desired reflection characteristics (reflection wavelength, reflectance, wavelength band) by appropriately designing the film thickness, refractive index difference, and number of laminated layers of dielectrics to be laminated. it can.
- the reflectivity the greater the difference between the refractive indexes of the two types of dielectrics stacked, the higher the reflectivity at the same number of layers. Even when the difference in refractive index is small, the same reflectance can be achieved by increasing the number of layers.
- the wavelength band becomes wider as the difference in refractive index between the two types of dielectrics to be laminated increases.
- the thickness of the dielectric layer to be laminated is not limited by the center value (the optical thickness satisfying a predetermined relationship with the wavelength of light in the wavelength region).
- the band can be widened by laminating a large number of the fluctuated ones. Therefore, such a method is effective for a wide band when a combination of dielectrics having a small refractive index difference is used, such as a combination of polymer resins.
- the average reflectance of light in the wavelength regions of B, G, R, and R ' is not particularly limited, but may be 25% or more, more preferably 30% or more. Preferred.
- the reflection layer has a difference of 10% or more between the average reflectance of light in the wavelength region of B, G, R, and R ′ and the average reflectance of light outside the wavelength region in the visible wavelength region, Further, it is preferably 15% or more, more preferably 20% or more.
- the maximum reflectance of each of the light in the B, G, R, and R 'wavelength regions when a reflective screen is used is not particularly limited, but should be 40% or more, and more preferably 50% or more. Is preferred.
- the reflection layer has a difference of 25% or more between the maximum reflectance of light in the B, G, R, and R ′ wavelength regions and the average reflectance of light outside the wavelength region in the visible wavelength region, Furthermore, it is preferably 30% or more.
- the difference between the average reflectance and the maximum reflectance of each of the light in the B, G, R, and R ′ wavelength regions and the average reflectance of the light outside the wavelength region in the visible wavelength region is shown.
- the reflected light in the R ′ wavelength region has the purpose of supplementing the reflected light of the red component with respect to the light having a large incident angle. It is preferable that the average reflectance of light in the region is substantially equal to the average reflectance of light in the R wavelength region. In this way, by making the average reflectance of the light in the wavelength region of R ′ and R substantially equal, even when observing the positional force oblique to the screen, the reflected light of the ambient light is not affected. It is possible to prevent the color balance from being lost due to the blueness of the image color due to the sound.
- substantially equal means that the average reflectance of R ′ is about 70% to 130% of the average reflectance of R.
- the reflection layer used in the present invention may have a high reflectivity region for light in the four wavelength regions G, R, and R 'as a whole.
- R, and R ′ four kinds of reflective layers 21, 22, 23, and 24 having a high reflectance region may be optically adhered. In that case, it can be specifically laminated by pressure-sensitive adhesive or thermocompression bonding.
- a reflection layer having at least two high reflectance regions out of light in the wavelength region of B, G, R, and R ′ may be laminated with a reflection layer having another high reflectance region (not shown).
- FIG. 3 (a) one type of reflective layer 2 having a high reflectance region for light in the four wavelength regions B, G, R, and R ′ may be used.
- Such a reflective layer is usually provided on the substrate 1, as shown in FIG. 3 (b).
- the substrate serves as a support for the reflective screen of the present invention, and a plate or a sheet can be selected depending on the application.
- a base material transparent or opaque materials such as glass, metal, and polymer resin can be used.
- the resin include polycarbonate (PC), polyethylene terephthalate (PET), polyethylene Examples include naphthalate (PEN), polyethersulfone (PE S), and polyolefin (PO).
- the reflection type screen of the present invention preferably has a light absorption layer that absorbs light transmitted through the reflection layer on a surface different from the incident surface side of the reflection layer.
- the light absorption layer absorbs the light transmitted through the reflection layer, and thus the reflection of the light transmitted through the reflection layer can be prevented.
- Such a light absorption layer can be formed by coating a black paint or the like on one surface or both surfaces of the substrate.
- the reflective layer may be provided on the light absorption layer, and when the substrate is transparent, it has a light absorption layer of the substrate. You may provide in the surface opposite to a surface.
- a material in which the base material itself is made black by kneading a light absorbing agent such as a black pigment into the material may be used as the light absorbing layer 4.
- the light absorption layer is preferably coated with a black paint or the like on the base material, or a black film in which the base material itself is black.
- the reflective screen of the present invention preferably has a light diffusing member 3 (light diffusing layer 31) closer to the incident surface than the reflective layer of the reflective screen.
- the light diffusing member is provided in order to diffuse the light reflected by the above-described reflective layer to eliminate glare of the image and to view the image with a wide viewing angle.
- the light diffusing member IS K7105: 1981 haze (hereinafter also simply referred to as haze) is 60% or more, preferably 70% or more, and the total light transmittance (hereinafter referred to as JIS K7361-1: 1997).
- the tristimulus value Y (hereinafter also simply referred to as tristimulus value Y) in the reflection method of JIS Z8722: 2000 is 10 or less. U, preferably 8 or less. Note that the tristimulus value Y in the JIS Z8722: 2000 reflection method corresponds to the photometric amount, and the smaller the value, the less the back diffused light.
- Such a light diffusing member has at least a light diffusing layer.
- a transparent spherical fine particle, a transparent binder having a refractive index different from that of the spherical fine particle, and also a force are used. Is given.
- a liquid that can be transparent and spherical particles can be uniformly dispersed and held, and a fluid such as liquid or liquid crystal, or a solid such as glass or polymer resin can be used. From the standpoint of properties and dispersion stability, high molecular weight resin is preferred.
- the glass used as the transparent binder is not particularly limited as long as the light transmission of the light diffusion layer is not lost, but in general, silicate glass, phosphate glass, borate glass. And so on.
- polyester resin acrylic resin, Acrylic urethane resin, Polyester acrylate resin, Polyurethane acrylate resin, Epoxy acrylate resin, Urethane resin, Epoxy resin, Polycarbonate resin, Cellulose Oil, acetal resin, vinyl resin, polyethylene resin S, polystyrene resin S, polypropylene resin S, polyamide resin S, polyimide resin, melamine resin, vinyl
- a thermoplastic resin such as a nor-based resin, a silicone-based resin, and a fluorine-based resin, a thermosetting resin, and an ionizing radiation-curable resin can be used.
- spherical fine particles examples include inorganic fine particles such as silica, alumina, talc, zircoure, zinc oxide, and titanium dioxide, and organic fine particles such as polymethyl methacrylate, polystyrene, polyurethane, benzoguanamine, and silicone resin. Fine particles can be used. In particular, organic fine particles are preferable in that a spherical shape can be easily obtained.
- the particle diameter of the spherical fine particles is preferably 1 ⁇ m-lO ⁇ m in terms of average particle diameter, and more preferably 2 ⁇ m to 6 ⁇ m.
- a light diffusion layer having a tristimulus value of Y of 10 or less can be obtained with a haze of 60% or more. It is possible to reduce the light diffused backward (backward diffused light) with respect to the traveling direction of the light. As a result, when ambient light other than projector-powered image light is incident on the light diffusing layer, the backward diffused light can be reduced, so that the dark display portion of the projector image is brightened even in projection in a bright environment. It is possible to prevent this from happening and to display images with even higher contrast.
- the particle size distribution of the spherical fine particles is not particularly limited as long as the average particle diameter is within the above range, and may be monodispersed or polydispersed, but may be more backward diffused. From the viewpoint of reducing light, monodispersed ones are preferred.
- a value obtained by dividing the refractive index of the spherical fine particles by the refractive index of the transparent binder is 0.91 or more and 1.09 or less (however, 1.00 Except)).
- the light diffusion layer having a haze of 60% or more and a tristimulus value Y of 10 or less. It is possible to reduce the amount of backward diffused light while having high diffusibility.
- the light diffusing layer has a projector power other than video light. When ambient light is incident, back-diffused light can be reduced, preventing the dark display part of the projector image from becoming brighter even when projected in a bright environment, and a higher contrast image. Can be projected.
- the content of the spherical fine particles in the light diffusing layer and the thickness of the light diffusing layer cannot be unconditionally defined by the refractive index of the spherical fine particles and the refractive index of the transparent binder, but the average particle diameter of the spherical fine particles.
- the value obtained by dividing the refractive index of the spherical fine particles by the refractive index of the transparent resin binder is the above-mentioned range (0.91 to 1.09, but 1.00
- the combination of materials and the light diffusion layer thickness may be adjusted so that the haze is 60% or more.
- the reflected light of the projected image can be appropriately diffused and the viewing angle can be made sufficiently wide. Also, by setting the total light transmittance to 70% or more, light incident on the projector can be efficiently transmitted to the reflective layer, so that the image can be projected brighter.
- the light diffusing member as described above preferably has a substantially smooth surface.
- substantially smooth means that the arithmetic average roughness (Ra) in JIS B0601: 2001 is 0.30 ⁇ m or less, preferably 0.15 ⁇ m or less. By setting it in such a range, it is possible to reduce the reflection while Y of the tristimulus value is 10 or less, and to make the screen easier to see.
- Such a light diffusing member 3 can be formed as the light diffusing layer 31 by, for example, applying spherical fine particles coated with a polymer resin to the reflective layer 2 and drying. ( Figure 3 (b)).
- a polymer resin may be melted and spherical fine particles may be added to form a sheet, which may be attached to the reflective layer 2 via the adhesive layer 5 or the like (FIG. 4).
- the spherical fine particles coated with a polymer resin are applied to a transparent substrate 1 'such as glass or polymer resin similar to the above-mentioned substrate 1, dried, and the adhesive layer 5 or the like is applied. It can also be attached to the reflective layer 2 via (Figs. 5 and 6).
- an adhesive can be used as a transparent binder in the light diffusion layer 31, and the light diffusion layer 31 can be applied on the substrate 1 ', dried and adhered to the reflective layer 2 (FIG. 7). .
- the reflective screen of the present invention improves screen characteristics. It is possible to add other layers for this purpose. For example, an antireflection layer may be provided as the uppermost layer. As a result, the projector power can also prevent a decrease in the amount of light of the projected image, and a bright image can be projected by the screen, and the reflection can be reduced to make the screen more visible.
- the tristimulus value Y is 10 or less, fine irregularities for preventing reflection may be provided on the surface. As a result, it is possible to reduce the difficulty in viewing the image due to the reflection while minimizing the decrease in contrast.
- the reflective screen of the present invention may be provided with a hard coat layer as the uppermost layer. As a result, it is possible to prevent deterioration in display quality due to scratches on the screen surface.
- the reflective screen of the present invention selectively reflects light in a specific wavelength region by alternately laminating at least two types of transparent dielectric thin films having different refractive indexes.
- An optical multilayer film is used as a reflective layer, and the reflective layer has light reflectivity with respect to light in a wavelength region of B, G, R, and R ′, and each of the light in the wavelength region Is higher than the average reflectance of light outside the above-mentioned wavelength region in the visible wavelength region, which increases the brightness of images with high contrast, especially in the dark display area of projector images, even in bright environments.
- images with high image color reproducibility especially images with little color change of the image when the screen is viewed at an oblique position, are displayed. Can do.
- a light diffusing layer having a thickness of 35 m was formed on the reflective layer by applying and drying a coating solution for the light diffusing layer having the following formulation, and the reflective screen of Example 1 was obtained.
- the average reflectance of light in the B, G, R, and R ′ wavelength regions of the reflective screen of Example 1 is 34.2%, 38.5%, 38.2%, and 38.0%.
- the maximum reflectivities of light in the B, G, R, and R wavelength regions were 44.9%, 49.1%, 52.7%, and 45.3%. Also
- the average reflectance of light outside the B, G, R, and R 'wavelength regions within the visible wavelength region is 15.
- the average reflectance was obtained from the reflectance measured at 5 nm intervals.
- the haze is 90.3%
- the total light transmittance is 96.3%
- the reflection The tristimulus value Y in the method was 5.8.
- the value obtained by dividing the refractive index of the spherical fine particles by the refractive index of the transparent binder was 0.92.
- a light diffusing member having a thickness of 35 / zm was formed by applying a light diffusion layer coating solution having the following formulation onto a 75 ⁇ m thick transparent film (Lumirror T60: Toray Industries, Inc.) and drying.
- Example 2 Thereafter, in the same manner as in Example 1, a B, G, R, R 'reflective layer was formed on the black film, and the surface having the light diffusing layer of the light diffusing member was formed on the reflective layer.
- the reflection type screen of Example 2 was obtained. It should be noted that the average reflectance and maximum reflectance of light in the B, G, R, and R wavelength regions of the reflective screen of Example 2 and the average of light outside the wavelength region in the visible wavelength region The reflectance was the same as in Example 1.
- the haze of the light diffusing member when the measurement surface is the transparent film side is 82.5%, the total light transmittance is 95.0%, and the tristimulus value Y in the reflection method is 5.5. there were.
- the value obtained by dividing the refractive index of the spherical fine particles by the refractive index of the transparent binder was 1.08.
- a reflective screen of Example 3 was obtained in the same manner as in Example 2 except that the light diffusion layer coating solution of Example 2 was changed to one having the following composition.
- the haze of the light diffusing member when the measurement surface is the transparent film side is 89.1%.
- the total light transmittance was 97.0%, and the tristimulus value Y in the reflection method was 5.3.
- the value obtained by dividing the refractive index of the spherical fine particles by the refractive index of the transparent binder was 0.96.
- Example 4 In the same manner as in Example 1, a B, G, R, R ′ reflective layer is formed on a black film, and a light diffusing film (Dilad Screen WS: Kimoto Co.) is laminated on the upper layer as a light diffusing member.
- the reflective screen of Example 4 was obtained. Incidentally, the average reflectance and maximum reflectance of light in the B, G, R, and R ′ wavelength regions of the reflective screen of Example 4, and the average reflectance of light outside the wavelength region in the visible wavelength region was the same as in Example 1. [0077] Further, when the measurement surface of the light diffusive film is a surface having a light diffusion layer, the haze is 8
- a reflective screen of Comparative Example 1 was obtained in the same manner as Example 4 except that the R ′ reflective layer was not formed.
- the haze and total light transmittance in the above examples and comparative examples are based on haze IS K7105: 1981, and based on total light transmittance IS IS K7361-1: 1997, turbidimeter NDH2000 (Nippon Denshoku Industries Co., Ltd.)
- a colorimetric color difference meter ZE2000 (Nippon Denshoku Industries Co., Ltd.) based on JIS Z8722: 2000 is used.
- Measured with The geometric condition for illumination and reception of ZE2000 is condition d. Since the measurement sample has high light transmission, the transmitted light during measurement by the reflection method was not affected by the measurement.
- ⁇ indicates that the contrast is high and the visibility is good even in a bright state where the illumination is ⁇ ⁇ or more, and the visibility is good when the illuminance is 5001x or more and less than ⁇ ⁇ ⁇ .
- the ones with good quality were marked with “ ⁇ ”, and those with good illuminance below 5001x were marked with “X”.
- the illuminance is the illuminance at the center of the screen when the projector is not projected.
- the projector With the illuminance at the center of the screen when the projector is not projected at about ⁇ , the projector is lit in white, and the color coordinates at the center of the screen are measured from 60 ° diagonally from the front and the front. .
- the measured value at the oblique position was the average of the left and right values.
- the color coordinates were measured with a colorimetric color difference meter CS-100 (Co-Caminolta).
- CS-1 The field of view of 00 is a 2 degree field of view.
- an optical multilayer film that selectively reflects light in a specific wavelength region by alternately laminating at least two types of transparent dielectric thin films having different refractive indexes.
- the reflective layer has light reflectivity with respect to blue, green, red, and light in a wavelength region of 670 nm to 730 nm, and has an average reflectance of each of the light in the wavelength region.
- the average reflectance of light outside the wavelength range in the visible wavelength range is higher than that of the wavelength range, so that images with high contrast and high color reproducibility are displayed even in bright environments.
- the light diffusibility in which the haze is 60% or more, the total light transmittance is 70% or more, and the tristimulus value Y is 10 or less on the incident surface side of the reflective layer Because it has components, the brightness of the dark display area of the projector image does not increase with little backscattering of ambient light, and the image with the highest contrast can be projected. It was.
- the reflective screen of Comparative Example 1 is an optical multilayer film that selectively reflects light in a specific wavelength region by alternately laminating thin films of at least two kinds of transparent dielectric materials having different refractive indexes. Is used for the reflective layer, and the reflective layer has light reflectivity with respect to light in the blue, green, and red wavelength regions, and thus displays a high-contrast image even in a bright environment. The resulting force was not strong enough to reflect light in the wavelength range of 670 nm to 730 nm, so the color of the image changed when the screen was viewed from an oblique position.
- FIG. 1 is a diagram illustrating the principle of a reflective screen according to the present invention.
- FIG. 2 is a cross-sectional view showing one embodiment of the reflective layer of the reflective screen of the present invention.
- FIG. 3 is a cross-sectional view showing one embodiment (b) of the reflective screen of the present invention and another embodiment (a) of the reflective layer.
- FIG. 4 is a cross-sectional view showing another embodiment of the reflective screen of the present invention.
- FIG. 5 is a sectional view showing another embodiment of the reflective screen of the present invention.
- FIG. 6 is a sectional view showing another embodiment of the reflective screen of the present invention.
- FIG. 7 is a cross-sectional view showing another embodiment of the reflective screen of the present invention.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/792,342 US7679823B2 (en) | 2004-12-08 | 2005-12-07 | Reflective screen |
JP2006546730A JP4555833B2 (ja) | 2004-12-08 | 2005-12-07 | 反射型スクリーン |
Applications Claiming Priority (2)
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JP2004354998 | 2004-12-08 | ||
JP2004-354998 | 2004-12-08 |
Publications (1)
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WO2006062123A1 true WO2006062123A1 (ja) | 2006-06-15 |
Family
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Family Applications (1)
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PCT/JP2005/022446 WO2006062123A1 (ja) | 2004-12-08 | 2005-12-07 | 反射型スクリーン |
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US (1) | US7679823B2 (ja) |
JP (1) | JP4555833B2 (ja) |
WO (1) | WO2006062123A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010066750A (ja) * | 2008-08-12 | 2010-03-25 | Seiko Epson Corp | スクリーンの製造方法及びスクリーン |
JP2010097190A (ja) * | 2008-09-16 | 2010-04-30 | Seiko Epson Corp | スクリーン及びスクリーンの製造方法 |
WO2013122025A1 (ja) * | 2012-02-13 | 2013-08-22 | 東レ株式会社 | 反射フィルム |
KR20160077188A (ko) * | 2013-10-30 | 2016-07-01 | 쌩-고벵 글래스 프랑스 | 투명 층들로부터 만들어진 소자 |
JP2017027026A (ja) * | 2015-07-17 | 2017-02-02 | Jxエネルギー株式会社 | ガラス複合体、それを備えた透明スクリーン、およびそれを備えた映像投影システム |
JP2019144469A (ja) * | 2018-02-22 | 2019-08-29 | リンテック株式会社 | 車内灯利用型表示体 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006259575A (ja) * | 2005-03-18 | 2006-09-28 | Kimoto & Co Ltd | スクリーン |
US20100238665A1 (en) * | 2009-03-20 | 2010-09-23 | Eric William Hearn Teather | Diffusive light reflectors with polymeric coating |
US8568002B2 (en) * | 2010-03-05 | 2013-10-29 | Southpac Trust International Inc., Trustee of the LDH Trust | Light diffusion and condensing fixture |
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JP2004038003A (ja) * | 2002-07-05 | 2004-02-05 | Sony Corp | 投影用スクリーンおよびその製造方法 |
JP2004061521A (ja) * | 2002-06-07 | 2004-02-26 | Kimoto & Co Ltd | 反射型スクリーン |
JP2004061546A (ja) * | 2002-07-24 | 2004-02-26 | Sony Corp | 投影用スクリーンおよびその製造方法 |
JP2004117480A (ja) * | 2002-09-24 | 2004-04-15 | Sony Corp | 反射型スクリーン及びその製造方法 |
JP2004284232A (ja) * | 2003-03-24 | 2004-10-14 | Nippon Zeon Co Ltd | 積層体及び光学部材 |
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US6847483B2 (en) * | 2001-12-21 | 2005-01-25 | Bose Corporation | Selective reflecting |
JP4111011B2 (ja) | 2002-03-14 | 2008-07-02 | ソニー株式会社 | 投影用スクリーン |
CN100371825C (zh) * | 2002-07-24 | 2008-02-27 | 索尼株式会社 | 投影屏及其制造方法 |
JP2004138938A (ja) | 2002-10-21 | 2004-05-13 | Sony Corp | スクリーン及びその製造方法 |
JPWO2004109390A1 (ja) * | 2003-06-06 | 2006-07-20 | 松下電器産業株式会社 | レーザ投射装置 |
JP4706290B2 (ja) * | 2004-03-18 | 2011-06-22 | ソニー株式会社 | スクリーン及びその製造方法 |
US7408709B2 (en) * | 2004-03-18 | 2008-08-05 | Sony Corporation | Screen and method for manufacturing the same |
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2005
- 2005-12-07 JP JP2006546730A patent/JP4555833B2/ja not_active Expired - Fee Related
- 2005-12-07 US US11/792,342 patent/US7679823B2/en not_active Expired - Fee Related
- 2005-12-07 WO PCT/JP2005/022446 patent/WO2006062123A1/ja active Application Filing
Patent Citations (5)
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JP2004061521A (ja) * | 2002-06-07 | 2004-02-26 | Kimoto & Co Ltd | 反射型スクリーン |
JP2004038003A (ja) * | 2002-07-05 | 2004-02-05 | Sony Corp | 投影用スクリーンおよびその製造方法 |
JP2004061546A (ja) * | 2002-07-24 | 2004-02-26 | Sony Corp | 投影用スクリーンおよびその製造方法 |
JP2004117480A (ja) * | 2002-09-24 | 2004-04-15 | Sony Corp | 反射型スクリーン及びその製造方法 |
JP2004284232A (ja) * | 2003-03-24 | 2004-10-14 | Nippon Zeon Co Ltd | 積層体及び光学部材 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010066750A (ja) * | 2008-08-12 | 2010-03-25 | Seiko Epson Corp | スクリーンの製造方法及びスクリーン |
JP2010097190A (ja) * | 2008-09-16 | 2010-04-30 | Seiko Epson Corp | スクリーン及びスクリーンの製造方法 |
WO2013122025A1 (ja) * | 2012-02-13 | 2013-08-22 | 東レ株式会社 | 反射フィルム |
JPWO2013122025A1 (ja) * | 2012-02-13 | 2015-05-11 | 東レ株式会社 | 反射フィルム |
KR20160077188A (ko) * | 2013-10-30 | 2016-07-01 | 쌩-고벵 글래스 프랑스 | 투명 층들로부터 만들어진 소자 |
KR102313394B1 (ko) | 2013-10-30 | 2021-10-14 | 쌩-고벵 글래스 프랑스 | 투명 층들로부터 만들어진 소자 |
JP2017027026A (ja) * | 2015-07-17 | 2017-02-02 | Jxエネルギー株式会社 | ガラス複合体、それを備えた透明スクリーン、およびそれを備えた映像投影システム |
JP2019144469A (ja) * | 2018-02-22 | 2019-08-29 | リンテック株式会社 | 車内灯利用型表示体 |
JP7053306B2 (ja) | 2018-02-22 | 2022-04-12 | リンテック株式会社 | 車内灯利用型表示体 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2006062123A1 (ja) | 2008-06-12 |
US7679823B2 (en) | 2010-03-16 |
US20080291536A1 (en) | 2008-11-27 |
JP4555833B2 (ja) | 2010-10-06 |
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