WO2004104694A1 - 反射型スクリーン - Google Patents
反射型スクリーン Download PDFInfo
- Publication number
- WO2004104694A1 WO2004104694A1 PCT/JP2003/011215 JP0311215W WO2004104694A1 WO 2004104694 A1 WO2004104694 A1 WO 2004104694A1 JP 0311215 W JP0311215 W JP 0311215W WO 2004104694 A1 WO2004104694 A1 WO 2004104694A1
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- WO
- WIPO (PCT)
- Prior art keywords
- layer
- reflective screen
- viewing angle
- reflective
- screen
- Prior art date
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Classifications
-
- 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
-
- 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
-
- 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
- G03B21/602—Lenticular screens
Definitions
- the present invention relates to a reflective screen, and more particularly, to a reflective screen used for projecting an image with a projection device (projector) or the like, and in particular, to obtain a bright, high-contrast projected image in a bright room. And a reflection type screen.
- Conventional reflective screens include, for example, a woven sheet of glass fiber or synthetic fiber, or an impregnated sheet in which a resin such as pinyl chloride is impregnated into a sheet of such a woven sheet, or pinyl chloride. It has been known to use a synthetic resin sheet such as that described above, an aluminum metal sheet, or the like as a screen base material and form a reflective layer on the surface of a screen base material made of these materials.
- the reflective layer may be, for example, a pearl paint obtained by dispersing a powder having a surface coated with titanium dioxide or a thin piece of my scale powder in a binder that is a light-transmitting resin or a silver paint using a metal powder such as aluminum. It is formed by applying an ink or ink to the surface of the screen substrate.
- a reflective layer is known in which a large number of fine transparent peas are arranged to provide regression.
- a screen in which a diffusion layer in which fine particles of calcite, which act as a light diffusing agent having low light absorption and are dispersed in a binder, are laminated on the above-mentioned reflection layer.
- Patent Document 1 Japanese Patent Laid-Open No. 11-38509 discloses a reflective screen having a configuration as shown in FIG.
- the reflective screen 110 has a light diffusion layer 118 for diffusing a projected image formed on a surface 116A of the base material 116 of the prism sheet 112, and the base material 116.
- a plurality of stripe-shaped prisms 120 made of an optically transparent resin are arranged on the back surface 116B of the screen so as to extend in the vertical direction of the screen.
- the prism 120 has an isosceles triangular sectional force, and has a constant apex angle and a constant side length.
- a light-absorbing sheet 114 which is opposed to the prism group on the back side of the prism sheet 112 and whose opposite surface is substantially black for absorbing transmitted light, is arranged in parallel with the prism sheet 112. Have been.
- FIGS. 54 to 56 are diagrams for explaining the function of the prism in the reflective screen of Patent Document 1 described above, and only the prism '.120 and the base material 116 constituting the reflective screen are shown. This is shown schematically.
- the angle of incidence of the projection light on the reflection type screen 110 is 0 ° or more in the horizontal direction. Since it has a width of about 15 °, it was incident on the reflective screen 1 110 directly.
- the reflective screen 110 of Patent Document 1 has a viewing angle that is increased by the action of the prisms 120 that are arranged so as to extend in the vertical direction.
- the prisms 120 By absorbing light with large angles of incidence, we are trying to improve the contrast of projection in bright places. However, bright only considers light that is horizontally incident on the screen, such as when sunlight enters the room. The contrast is improved by absorbing the outer tongue L1 ⁇ 2 incident in the horizontal direction with the light absorbing sheet 114 as described above.
- no consideration is given to the case where disturbance light is incident on the reflective screen 110 from above, such as an electric light. That is, the prism 120 extending in the vertical direction cannot expect the effect of absorbing disturbance light incident from above with the light absorbing sheet.
- the projected light mainly entering the peripheral portion of the screen from above is a prism as shown in FIGS. 55 and 56.
- the amount of light transmitted by the function of 120 increases, and it is absorbed, so the light is projected light but does not return to the audience, but becomes dark.
- the darkness is remarkable due to the angle of incidence. become.
- a reflective screen is required to have good contrast in a bright room, and to further improve the horizontal viewing angle and the screen CCR.
- the present invention has been made in view of the above-mentioned circumstances, and is a reflective screen that is bright and has a high contrast even in a bright room.
- One screen CCR is intended to provide a good reflective screen.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-38509 Disclosure of the Invention
- a first technical means of the reflection-type screen of the present invention is characterized in that the reflection-type screen includes a diffusion layer for narrowing the diffusion of light, and a reflection layer for reflecting light transmitted through the diffusion layer.
- the second technical means of the reflection type screen of the present invention is characterized in that the diffusion in the horizontal direction is relatively larger than the diffusion in the vertical direction of the screen.
- the third technical means of the reflection type screen of the present invention includes: a diffusion layer for narrowing the diffusion of light from the incident side of the projected light; a horizontal viewing angle expansion layer for expanding the horizontal viewing angle; And a reflective layer for reflecting the transmitted light transmitted through the directional viewing angle widening layer.
- a fourth technical means of the reflection type screen of the present invention is the reflective technical screen according to the third technical means, wherein the horizontal viewing angle enlarging layer includes a plurality of ridges arranged continuously, and a top of the ridges is It is characterized by being arranged on the reflection layer side.
- the horizontal viewing angle enlarging layer is formed by continuously arranging a plurality of ridges; The strips are arranged continuously so that the longitudinal direction of each of the ridges coincides with the vertical direction of the reflective screen.
- the pitch in the arrangement direction of the ridges is 0.20 m or less, more preferably 15.5 m or less. It is characterized by
- a seventh technical means of the reflective screen of the present invention is the reflective technical screen according to any one of the fourth to the sixth technical means, wherein the horizontal viewing angle enlarging layer is characterized in that the ridge has a cylindrical shape.
- the eighth technical means of the reflection type screen of the present invention is any one of the above-described fourth to sixth techniques.
- the horizontal viewing angle enlarging layer is characterized in that the ridge has a prism shape.
- a ninth technical means of the reflective screen of the present invention is the reflective technical screen according to any one of the fourth to sixth technical means, wherein the horizontal viewing angle enlarging layer has a shape in which the ridge has a wave shape.
- a tenth technical means of the reflective screen of the present invention is the technical means according to any one of the third to ninth technical aspects, wherein the reflective layer is non-adhesively disposed on the back side of the horizontal viewing angle enlarging layer. It is characterized by being established.
- the eleventh technical means of the reflective screen of the present invention is the reflective technical screen according to any one of the third to ninth technical means, wherein the reflective layer comprises an adhesive layer on the back side of the horizontal viewing angle enlarging layer. It is characterized in that it is adhered through.
- the reflective layer and the horizontal viewing angle enlarging layer are partially adhered to each other; And a medium having a refractive index different from that of the horizontal-viewing-angle expanding layer is provided between the horizontal-viewing-angle expanding layer and the adhesive layer at a non-adhesion portion between the horizontal-viewing-angle expanding layer and the horizontal-viewing-angle expanding layer. It is characterized by having
- a thirteenth technical means of the reflective screen of the present invention in any one of the fourth to ninth technical means, wherein the reflective layer, on the surface of the convex row of the horizontal viewing angle expansion layer, It is characterized in that layers are formed by vapor deposition or coating.
- a fourteenth technical means of the reflective screen of the present invention is the reflective technical screen according to any one of the fourth to ninth technical means, wherein the reflective layer is formed by a reflective sheet laminated on the surface of the convex rows. It is characterized by:
- a fifteenth technical means of the reflective screen of the present invention is the reflective technical screen according to any one of the third to fourteenth technical means, wherein the diffusing layer is formed by dispersing a diffusing material by beads and a pigment or a pigment. It is characterized by being formed of a transparent resin piner.
- a sixteenth technical means of the reflective screen of the present invention is the reflective technical screen according to the fifteenth technical means, wherein: The surface roughness of the diffusion layer and the internal haze of the diffusion layer are individually controlled.
- a seventeenth technical means of the reflective screen according to the present invention is the reflective technical screen according to any one of the third to 1'6 above, wherein the reflective screen has a TINT layer containing TINT,
- the TINT layer is characterized in that it is stacked on the incident side of the projection light with respect to the horizontal viewing angle expansion layer.
- the eighteenth technical means of the reflective screen of the present invention is the technical means of any one of the third to seventeenth, wherein the reflective screen has a black matrix layer in which a black matrix is formed, The black matrix layer is stacked on the incident side of the projection light with respect to the horizontal viewing angle expansion layer.
- a nineteenth technical means of the reflective screen of the present invention is the reflective technical screen according to any one of the third to eighteenth technical means, wherein the reflective screen has a base made of a transparent resin sheet; Are laminated on the incident side of the projection light with respect to the horizontal viewing angle expansion layer.
- the 20th technical means of the reflective screen of the present invention is the reflective technical screen according to any one of the 4th to 19th technical means, wherein the horizontal viewing angle enlarging layer comprises: a sheet-like substrate; Characterized in that the above-mentioned arrangement of the ridges is formed on the surface.
- a twenty-first technical means of the reflective screen according to the present invention is a reflective screen which forms a projected image by receiving projection light from a projection device in a front direction.
- a horizontally long screen used indoors, which is incident from a light diffuser, the light diffuser, and the projection light transmitted through the light diffuser is reflected in a direction to widen the viewing angle in the horizontal direction, and is transmitted through the light diffuser.
- the second technical means of the reflective screen of the present invention is the above-mentioned twenty-first technical means,
- the reflective screen has a viewing angle of 15 degrees or more.
- a distance between the reflective screen and an observer is 1.5 m or more.
- the twenty-fourth technical means of the reflective screen of the present invention is any one of the above-mentioned twenty-first to twenty-third forces, wherein in the first technical means, the viewing angle widening reflection portion is formed with irregularities in a 7K flat direction, The projections and depressions are characterized by being arranged to extend in the vertical direction of the reflection type screen.
- a twenty-fifth technical means of the reflective screen of the present invention is the technical means according to any one of the twenty-first to twenty-fourth technical means, wherein the viewing angle-enlarging and reflecting portion comprises: an uneven viewing angle-enlarging layer; It is characterized by comprising a reflective layer located on the back of the corner-enlarging layer.
- FIG. 1A is a view for explaining one embodiment of the reflection type screen of the present invention, and is a view for explaining the behavior of illumination light and light projected from a projection device.
- FIG. 1B is a view for explaining one embodiment of the reflection screen of the present invention, and is a view showing a configuration example of a reflection screen having a weak diffusion layer and a reflection layer.
- FIG. 2 is a diagram for explaining the behavior of the illumination light and the projection light from the projection device on the mat screen.
- FIG. 3 is a diagram showing an example of horizontal and vertical viewing angle characteristics of the reflective screen of the present invention.
- FIG. 4 is a view for explaining another embodiment of the reflection type screen of the present invention.
- FIG. 5 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 6 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 7 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 8 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 9 is a view for explaining still another embodiment of the anti-sealing screen of the present invention.
- FIG. 10 is a view for explaining another embodiment of the reflection type screen of the present invention (another embodiment.
- FIG. 11 is a view showing another embodiment of the reflection type screen of the present invention.
- Fig. 12 is a view for explaining still another embodiment of the reflection type screen of the present invention
- Fig. 13 is a view for explaining another embodiment of the reflection type screen of the present invention.
- Fig. 14 is a view for explaining still another embodiment of the reflection type screen, Fig. 14 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- Fig. 15 is a view for explaining another embodiment of the reflection screen and the screen of the present invention
- Fig. 16 is a view showing another embodiment of the reflection screen and the screen of the invention
- Fig. 17 is a view for explaining still another embodiment of the reflection type screen of the present invention
- Fig. 18 is a view for explaining another embodiment of the reflection type screen of the present invention.
- Fig. 19 is a diagram for explaining still another embodiment of the reflective screw and the button of the present invention
- Fig. 20 is a diagram illustrating the reflective screw of the present invention.
- Fig. 21 is a view for explaining a further embodiment of the reflection screen of Fig. 21.
- Fig. 21 is a view for explaining another embodiment of the reflection type screen of the present invention.
- Fig. 23 is a view showing another embodiment of the reflection type screen of the present invention.
- Fig. 24 is a view for explaining still another embodiment of the reflection type screen of the present invention,
- Fig. 25 is a view showing the reflection type screen of the present invention
- Fig. 26 is a view for explaining still another embodiment of Fig. 26.
- Fig. 26 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- 27 is a reflection type switch of the present invention.
- Fig. 28 is a view for explaining still another embodiment of the screen, Fig. 28 is a view for explaining still another embodiment of the reflection screen and the screen of the present invention.
- FIG. 29 is a view for explaining still another embodiment of the reflection type screen of the present invention
- Fig. 30 is a view of another embodiment of the reflection type screen of the present invention
- Fig. 31 is a view for explaining still another embodiment of the reflection type screen of the present invention
- Fig. 32 is a view for explaining the reflection type screen of the present invention
- Fig. 33 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 34 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 35 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 36 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 37 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 30 is a view of another embodiment of the reflection type screen of the present invention
- Fig. 31 is a view for explaining still another embodiment of the reflection type screen of the present invention
- FIG. 38 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 39 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 40 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 41 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 42 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 43 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 44 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 45 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 46 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 46 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 47 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 48 is a view for explaining still another embodiment of the reflective screen of the present invention.
- FIG. 49 is a view for explaining still another embodiment of the reflection type screen of the present invention.
- FIG. 50 is a diagram for explaining a method of measuring luminance in a reflective screen according to the present invention.
- FIG. 51 is a diagram for explaining the luminance measurement position of the reflective screen.
- FIG. 52 is a table showing the luminance measurement results and the screen contrast calculation results at each luminance measurement position of the reflective screen.
- FIG. 53 is a diagram showing a configuration of a reflective screen described in Japanese Patent Application Laid-Open No. 11-38509.
- FIG. 54 is a diagram for explaining the operation of the reflective screen described in Japanese Patent Application Laid-Open No. 11-38509.
- FIG. 55 is a diagram of ffil for describing the operation of the reflective screen described in Japanese Patent Application Laid-Open No. 11-38509. -
- FIG. 56 is still another view for explaining the operation of the reflective screen described in Japanese Patent Application Laid-Open No. 11-38509. BEST MODE FOR CARRYING OUT THE INVENTION
- the reflective screen of the present invention has a high contrast even in a bright room, and can obtain a good horizontal viewing angle and a good CCR.
- the decrease in the contrast of the screen in a bright room is caused not only by the projection light from the projection device but also by the disturbance light, which is a cause of disturbance of the illumination lamps in the room, being reflected toward the observer.
- the direction of reflection of these lights is separated by the difference in the angle of incidence of the projection light from the projection device and the external tongue L3 ⁇ 4 due to the illumination lamp etc. with respect to the screen.
- the specular reflection reflects the projection light from the projection device in front of the screen to the front of the screen, and disturbs the disturbance light from the illuminating lamp that enters from obliquely above the screen. Improves bright room contrast by reflecting light.
- the incident light is simply reflected specularly and there is no diffusion on the image plane, the image cannot be seen. Therefore, the projection light must be diffused on the image plane.
- FIGS. 1A and 1B are views for explaining one embodiment of the reflection type screen of the present invention.
- the diffusion characteristic of the reflection imaging surface is weak diffusion
- the illumination light and the projection from the projection device are used.
- Fig. 1A shows a diagram for explaining the behavior with light
- Fig. 1B shows a configuration example of a reflective screen with a weakly diffusing layer and a reflective layer that suppresses the degree of light diffusion.
- the reflection type screen of the present invention In the first embodiment, as shown in FIG. 1B, a diffusion layer 40 for reducing the degree of diffusion, and a reflection layer 30 for reflecting transmitted light that has entered the reflection type screen and transmitted through the diffusion layer 40 are used. Have.
- the diffusion layer 40 has a weak diffusion characteristic described later, and narrows the diffusion in the vertical direction with respect to disturbance light incident from above the reflective screen 1. As a result, it is possible to suppress a decrease in contrast due to reflection in the direction of the disturbance light power S observer I.
- the reflection intensity ratio when the projected light power is completely diffused on the screen is circular regardless of the incident angle, and the radius of the circle showing the reflection intensity ratio differs depending on the incident illuminance.
- the reflection intensity ratio on the mat screen changes slightly vertically as compared with the perfect diffusion circle as shown in FIG.
- the intensity ratio of the diffused light is considerably elongated as shown in FIG. 1A.
- the diffusion in which the intensity ratio of the diffused light is vertically longer than that of the circular shape is called weak diffusion, and is called to reduce the scatter.
- the shape of the reflection intensity ratio varies from a circle to a vertically long ellipse depending on the degree of diffusion of light in the diffusion layer (D and G in FIG. 1A, ⁇ ⁇ and N in FIG. 2). ) The point is that it is actively used to improve the contrast of the projected image in a bright room with a light source such as an electric lamp above the lean.
- the first embodiment of the reflection type screen according to the present invention comprises a diffusion layer 40 having a weak diffusion characteristic in which the degree of diffusion of light is suppressed, and a light transmitted through the diffusion layer 40.
- the diffusion layer 40 forms a projection image and has a viewing angle characteristic according to the degree of diffusion, and the reflection layer 30 has a function of increasing the reflection efficiency of light projected from the projection device.
- reflection of the projection lens due to reflection on the screen surface and improvement of a hot spot or a hot band due to insufficient diffusion are performed.
- the contrast between the projected light and the disturbance light from above the screen can be improved by using the reflection intensity ratio based on the degree of diffusion.
- a suitable contrast ratio according to the intensity of disturbance light can be obtained by using a weak diffusion layer having an appropriate value.
- the reflective layer 30 not only increases the reflectance, but also reflects the external tongue light transmitted through the diffusion layer 40 from the electric lamp downward to prevent the light from entering the observer's eyes, thereby increasing the contrast ratio.
- the diffusion layer 40 has a weak diffusion characteristic.
- the most preferable weak diffusion characteristic is a total light transmittance of 80% or more, and HA ZE (Haze; cloudiness) value is 75% 10%.
- the reflection layer 30 has a mirror surface made of, for example, an aluminum layer.
- the diffusion layer 40 and the reflection layer 30 in each embodiment described later can be applied.
- the next feature of the present invention is that, in order to positively expand the horizontal viewing angle, the horizontal viewing angle in which the projection light transmitted through the diffusion layer 40 is reflected so as to be actively diffused in the horizontal direction.
- This is to provide a magnifying reflector (corresponding to the horizontal viewing angle magnifying layer and the reflecting layer in the following embodiments). Thereby, it is possible to further prevent the horizontal viewing angle from expanding and the CCR from deteriorating.
- the absorption layer is provided as in Patent Document 1, as described above, when the projection light incident from the projection device on the large screen passes through the prism depending on the incident angle, the light is According to the configuration of the present invention, the light incident on the screen is substantially reflected light, whereas the reflected light is not converted to reflected light, so that the CCR can be prevented from deteriorating.
- a diffusion layer for forming a projection image as described above and a reflection layer for increasing the reflection efficiency of light projected from the projection device are provided.
- it has a horizontal viewing angle expansion layer that expands the viewing angle in the horizontal direction.
- the diffusion layer forms the projected and image light and improves the contrast ratio by giving optimal diffusion characteristics.
- the reflection of the projection lens due to reflection on the screen surface and the improvement of hot spots or hot bands due to insufficient diffusion are improved.
- the degree of diffusion of the projected light on the image plane is too high, there is no distinction between the disturbance light and the projected light in the bright room, leading to a decrease in contrast. It must be narrowed, for example, a weak diffusion layer.
- the present invention having a horizontal viewing angle expansion layer described below
- the diffusion layer having the diffusion characteristics (total light transmittance of 80% or more and a HAZE value of 75 ⁇ 10%) of the first embodiment can be suitably applied.
- a diffusion characteristic capable of obtaining an optimal contrast can be appropriately selected according to the specifications of the screen / projection device or the method of using the screen.
- the light diffusing portion described in claim 21 of the present application corresponds to the diffusion layer in the following examples
- the viewing angle widening reflecting portion described in claim 21 of the present application corresponds to the following implementation.
- the horizontal viewing angle widening layer and the reflective layer in the examples correspond to the horizontal viewing angle widening layer in the following examples.
- FIG. 3 is a diagram showing an example of the horizontal and vertical viewing angle characteristics of the reflective screen of the present invention having a horizontal viewing angle enlarging layer for expanding the viewing angle in the 7K flat direction. It shows the difference between the horizontal and vertical characteristics when the luminance (G ain) is plotted on the angle (degrees) and the vertical axis.
- the reflective screen of the present invention has an anisotropy in viewing angle, and shows a large difference in characteristics between the horizontal direction and the vertical direction. Due to these characteristics, it is possible to obtain a reflective screen that has a wide viewing angle characteristic in the horizontal direction, and suppresses the reflection of disturbance light, such as illumination light, from above to the observer, and achieves high contrast. it can.
- 4 to 6 are views for explaining other embodiments of the reflection type screen of the present invention, and schematically show the configuration of the horizontal cross section of the screen.
- the optical path o shows a schematic optical path for the purpose of explaining the function of the present invention.
- 1 is a reflective screen
- 10 is a transparent resin sheet
- 20 is a layer for expanding the horizontal viewing angle
- 30 is a reflective layer
- 40 is a diffusion layer
- 41 is an acrylic peas
- 4 2 Is a transparent resin binder.
- a diffusion layer 40 is formed on one surface of a transparent resin sheet 10 as a base material, and a horizontal viewing angle expansion layer 20 is formed on the other surface of the transparent resin sheet 10. Have been. Further, on the outer surface of the horizontal viewing angle expansion layer 20, a reflection layer 30 is provided. The projection light from the projection device enters the diffusion layer 40 side. That is, the reflective screen of this embodiment is From the incident side of the projected light, a diffusion layer 40, a transparent resin sheet 10, a horizontal viewing angle widening layer 20, and a reflection layer 30 are arranged in this order.
- a diffusion sheet using a transparent resin binder 42 in which acrylic beads 41 are dispersed as a diffusing agent can be suitably used to achieve weak diffusion.
- the transparent resin binder 42 is a colorless material having excellent optical characteristics and a high transmittance.
- an acrylic binder By using an acrylic binder, the surface of the diffusion layer 40, which is the incident surface of the projected light, becomes a mat state, and the Irregular reflection of light is generated, and surface reflection at the incident part is reduced, so that a good image can be obtained.
- the diffusion sheet for example, a sheet having a thickness of about 100 m, a total light transmittance of 80% or more, and a HAZE value of 75 ⁇ 10% can be suitably used.
- urethane beads or styrene beads may be used in addition to the acrylic beads as described above.
- a pigment-based diffusing agent may be used.A pigment-based pigment absorbs light, thereby decreasing efficiency and reducing transmittance. Therefore, it is preferable to use the beads described above. .
- a pigment-based diffusing agent can increase the degree of diffusion, the present invention does not require strong diffusion, so that the required degree of diffusion can be imparted by a diffusing agent using beads.
- the higher the transmittance of the diffusion layer 40 the more the incident light transmitted through the diffusion layer 40 reaches the horizontal viewing angle expansion layer 20, and the more light that returns to the observer, the more the horizontal viewing angle Affected by enlarged layer 20.
- the diffusion layer 40 is laminated on the incident side of the projection light of the transparent resin sheet 10 serving as a base material by bonding.
- an adhesive or a pressure-sensitive adhesive that does not hinder the optical characteristics can be used.
- the surface of the transparent resin sheet 10 and a binder material to which a diffusing agent is added may be applied and cured to form a layer.
- a light-curing or thermosetting binder material can be used, or a binder material swelled or dissolved in a solvent is applied to the transparent resin sheet 10, and then the solvent is evaporated to form a layer. You may.
- a method of forming the diffusion layer 40 powder or peas of a transparent resin binder 42 mixed with a light diffusion material is extruded from a T-die by an extruder to be in a molten state or a semi-melted state.
- a method may be employed in which a layer is formed on the surface of the transparent resin sheet 10 in a molten state and then cooled.
- the viewing angle widening layer 20 has a function of expanding the viewing angle in the horizontal direction, and is formed of a sheet in which ridges are continuously arranged on one side.
- the horizontal viewing angle expansion layer 20 is configured such that the tops of the respective ridges are located on the side opposite to the incident side of the projection light.
- Examples of the sheet in which the ridges are continuously arranged as described above include a lenticular single lens sheet in which cylindrical shapes are continuously arranged, a prism sheet in which each ridge is a prism, or a wave sheet in which each ridge is a wave. Can be applied.
- the configuration in which the ridges are continuously arranged is, in other words, a configuration in which unevenness is formed in the horizontal direction of the reflective screen, and the uneven shape extends in the vertical direction of the reflective screen.
- FIG. 4 shows a configuration example of the horizontal viewing angle expansion layer 20 using the lenticular lens sheet as described above
- FIG. 5 shows a configuration example of the horizontal viewing angle expansion layer 20 using the prism sheet.
- the thickness of such a sheet having a shape such as a lenticular, a prism, and a wave should be less than 200 // m.
- the pitch in the arrangement direction of these ridges is 200 ° or less (1Z10 or less of the pixel size), and more preferably, 150 ⁇ m or less.
- the apex angle is preferably set to 100 ° ⁇ 10 °.
- the wave shape can be understood as a shape in which the vertex corners of the above-mentioned prisms and the valleys between the arranged prisms are curved, and the whole is shaped like a wave.
- the horizontal viewing angle expansion layer 20 contributes only to the horizontal diffusion characteristics, and is orthogonal to the arrangement direction of the lenticular array.
- the extension direction longitudinal direction of each ridge
- the degree of diffusion in the K plane direction is increased, and the viewing angle in the 7 plane direction is increased.
- the function of the horizontal viewing angle widening layer 20 enables the vertical and horizontal reflection characteristics (that is, diffusion characteristics) of the screen. Anisotropy occurs in the vertical direction, and in the vertical direction, the contrast is not reduced by disturbance light from the vertical direction without hindering the diffusion characteristics narrowed by the weak diffusion layer 40, and the viewing angle in the horizontal direction.
- the horizontal viewing angle characteristics of the projected light can be improved. That is, the 7K horizontal viewing angle expansion layer 20 changes the horizontal viewing angle distribution of the screen, but does not change the vertical viewing angle distribution. Strictly speaking, in the vertical viewing angle distribution, the magnitude of the peak value changes, but the distribution does not change. Since the projection lens of the projection device has a depth of focus, it has an imaging range at that depth of focus. Therefore, in the present reflection type screen, an image is formed twice by reflection by the reflection layer 30.
- the diffusion distribution that affects the viewing angle and the light collection degree (total reflection) It is necessary to take into account such factors as stray light due to light, etc.
- the optical path length from the first image formation to the second image formation should be reduced, and attention should be paid to the distribution of reflected light in the diffusion layer 40. It costs.
- the light incident on the horizontal viewing angle widening layer 20 is transmitted while being refracted by the convex surface, is reflected by the reflective layer 30 and is incident on the convex surface again to be affected by the convex surface again. Emit. Further, depending on the incident angle, the incident light is reflected on the convex surface, and the reflected light is incident on another portion of the convex surface, where the light is further refracted and reflected. Depending on the shape of the ridge, the reflected light on the ridge is reflected toward the front of the screen without passing through the reflection layer 30.
- the refracting power occurs against the cylindrical surface of the cylinder, so that the light reflected by the ridge and the reflection layer 30 continuously spreads.
- the fluctuation of CCR is small.
- the horizontal viewing angle can be wider than that of the prism shape.
- the regression is increased.
- the viewing angle can be widened by optimizing the vertex angle of the prism or by Fresnel reflection by the reflective layer 30.
- the convex shape of the wave shape is close to the shape having the R shape at the apex angle of the prism, it has the same effect as the cylindrical shape, and the reflection characteristic power with a continuous spread compared to the regular reflection can be obtained.
- the reflection layer 30 is provided to increase the efficiency of use of the projection light from the projection device.
- the reflection layer 30 is made of a flat plate having a reflection surface with a high reflectivity and is provided with a ridge of the horizontal viewing angle expansion layer 20. It is configured by placing it on the surface on the forming side.
- the reflective layer 30 and the horizontal viewing angle enlarging layer 20 may be disposed close to each other, and need not necessarily be laminated by an adhesive layer.
- a reflective plate having a certain degree of rigidity may be used as the reflective layer 30, and the reflective plate formed on the transparent resin sheet 10 may be fixed at the frame of the reflective screen 1. Good.
- the reflecting surface of the reflecting layer 30 can be formed by, for example, depositing or coating silver or aluminum on a substrate.
- the central portion of the reflector is pushed into the horizontal viewing angle expansion layer 20 side in advance, and the reflector is curved, so that the reflector is curved. It is possible to cope with characteristic deterioration due to aging. That is, if the gap between the reflection layer 30 and the horizontal viewing angle expansion layer 20 changes and spreads over time, the diffuse reflection between the reflection layer 30 and the horizontal viewing angle expansion layer 20 becomes strong, and diffusion occurs. The characteristics will change. In order to prevent this, the reflector is curved so that the center of the reflector protrudes toward the horizontal viewing angle expansion layer 20, and in this state, the reflection plate adheres to the horizontal viewing angle expansion layer 20. The frame around the reflector as shown.
- the above method can be applied not only to the reflection plate but also to the member on the horizontal viewing angle expansion layer 20 side.
- the central portion of the horizontal viewing angle expansion layer 20 may be curved in a direction in which it protrudes toward the reflector, and then these may be stacked and fixed.
- both the reflector and the member on the horizontal viewing angle expansion layer 20 side may be curved and fixed by lamination in the above-described manner.
- FIG. 7 is a view for explaining still another embodiment of the reflection type screen according to the present invention, and schematically shows a configuration of a horizontal section of the screen.
- the reflection type screen of the present embodiment has, in addition to the configuration shown in FIG. 4, a TIN that absorbs external light components and further improves the contrast. It has a configuration in which the T layer 50 is formed on the incident side surface of the diffusion layer 40.
- the transmittance of the TINT layer 50 is too low, the screen brightness is reduced. Therefore, it is preferable to set the transmittance to around 70%.
- the spectral characteristics those having a flat transmission spectral distribution characteristic without a habit in the visible light region, or the spectral distribution of the projected light emitted from the projection device ⁇ the spectral reflection distribution of other members of the screen are supplemented. Therefore, select one that has higher transmittance on the long wavelength side only or on the long wavelength side and short wavelength side than others.
- the TINT layer 50 a method of directly dyeing the sheet, a method of applying a pigment to the surface, and the like can be considered.
- the dyeing with the water-soluble dye is performed because the toning and transmittance are easily controlled.
- the TINT layer 50 is formed by applying and dyeing a water-soluble dye on the surface of the diffusion layer 40.
- the thickness of the TINT layer 50 was set to 25 m.
- a tree J3 sheet to which TINT is added or a tree sheet having a TINT layer formed on the surface in advance may be used as the above-mentioned TINT layer 50 and bonded to the diffusion layer 40 for lamination.
- the tin layer 50 may be laminated between the transparent resin sheet 10 and the diffusion layer 40 as shown in FIG. 8, or as shown in FIG. You may laminate
- the tint layer 50 is applied and formed on the surface of the diffusion layer 40 by the configuration of FIG. 7, the unevenness of the diffusion layer surface is filled with the material of the tint layer, and the HAZE to be caused by the unevenness of the diffusion layer surface is reduced.
- the HAZE of the entire diffusion layer which is originally caused by the unevenness on the surface of the diffusion layer and the diffusion agent inside the diffusion layer, is reduced. Therefore, it is necessary to design the diffusion characteristics of the diffusion layer 40 in consideration of the change in the characteristics.
- the configuration of FIG. 8 can be said to be most suitable for the disposition position of the TINT layer 50, and in this case, the black force of the image is the lowest and the image looks tight.
- each configuration example having the TINT layer 50 has a prism-shaped horizontal viewing angle expansion layer 20 and a wave-shaped horizontal viewing angle expansion layer 20 as shown in FIGS. 5 and 6, respectively. It can also be applied to configurations using.
- FIGS. 10 and 10 show configuration examples in which a tint layer 50 is provided on the incident side of the diffusion layer 40, and a prism sheet and a wave sheet are used as the horizontal viewing angle expansion layer 20. See Figure 11.
- FIG. 12 is a view for explaining still another embodiment of the reflection type screen of the present invention, and schematically shows a configuration of a horizontal section of the screen.
- 40a and 40b are diffusion layers
- 41a and 41b are acrylic beads used as a diffusion material
- 42a and 42b are transparent resin binders.
- the diffusion layer 40 has a single-layer configuration, but in this embodiment, the diffusion layer 40 has a multilayer configuration.
- two diffusion layers 40a and 4 Ob are laminated.
- the particle size, material, content, and particle size distribution of the acryl peas 4 la, 41 dispersed in each diffusion layer 40 a, 40 b are changed to form a layer, so that the surface roughness of the incident surface can be reduced.
- the HAZE of the diffusion layer 40 (the internal HAZE that does not depend on the surface roughness) can be controlled separately.
- beads having a plurality of particle sizes may be mixed, and the particle size distribution may be controlled by the mixing ratio.
- the surface roughness of the diffusion layer 40a on the incident surface side By optimizing the surface roughness of the diffusion layer 40a on the incident surface side by appropriately increasing the surface roughness, the light reflected on the surface of the diffusion layer 40a is diffused.
- the pupil image of the projection device viewed from the observer Also, it is possible to make the image of a fluorescent lamp in the room inconspicuous.
- a hot spot or a hot band due to the projection lens of the projection device can be reduced.
- FIGS. 1.3 and 14 show configuration examples in which the diffusion layer 40 has a two-layer configuration and the horizontal viewing angle expansion layer 20 uses a prism sheet and a wave sheet.
- FIGS. 15 to 17 show configuration examples in which the above-described TINT layer 50 is disposed on the incident light side surface of the diffusion layer in addition to the configurations in FIGS.
- a TINT layer is provided between each diffusion layer 40a and 4 Ob.
- Fig. 18 shows a configuration with 50 arrangements.
- the transparent resin binder forming the diffusion layer 40 may be replaced by TINT. May be added so as to have both the TINT layer and the diffused layer.
- Fig. 19 shows an example in which TINT is added to the diffusion layer 40 of the configuration in Fig. 4, and an example in which TINT is added to the diffusion layer 40b on the reflection layer side of the diffusion layer 40 in the configuration of Fig. 12. Is shown in FIG.
- FIGS. 21 to 25 are views for explaining still another embodiment of the reflective screen of the present invention, and schematically show the configuration of a horizontal section of the screen.
- a black matrix layer 60 made of black paint is formed on a portion that does not contribute to light emission of the screen, that is, a portion that does not serve as an optical path.
- the black matrix is designed to match the design of the horizontal viewing angle expansion layer 20 so that the visual effect can be improved most efficiently without reducing the luminance.
- a black stripe can be used as the black matrix layer 60.
- the horizontal view angle is adjusted so that the stripes are aligned with the vertical direction of the screen in accordance with the pitch of the ridges (lenticular, prism, web, etc.) of the large layer 20. Be placed.
- FIG. 21 shows a configuration in which a black matrix layer 60 is laminated between the diffusion layer 40 and the transparent resin sheet 10.
- FIG. 22 shows a configuration in which the black matrix layer 60 is formed on the incident side surface of the diffusion layer 40.
- FIG. 23 shows a configuration in which a black matrix layer 60 is laminated between a transparent resin sheet 10 and a horizontal viewing angle enlarging layer 20, and
- FIG. 24 shows a two-layer configuration.
- FIG. 25 shows a configuration in which a black matrix layer 60 is laminated between a diffusion layer 40 having diffusion layers 40 a and 40 b and a transparent resin sheet 10. This shows a configuration in which a black matrix layer 60 is laminated between two diffusion layers 40a and 40b. Note that these configurations can be applied to the prism-shaped horizontal viewing angle expansion layer and the wave-shaped horizontal viewing angle expansion layer as described above.
- the TINT layer 50 and the black matrix layer 60 draw black in the projected image. Tightening can enhance the visual effect. At this time, the TINT layer 50 and the black matrix layer 60 absorb a part of the projected light, but this absorption is a small amount of absorption for exhibiting the black tightening effect of the projected image. For example, the light absorption level is greatly different from that of the light absorption sheet such as the light absorption sheet of Patent Document 1 described above.
- FIG. 26 is a view for explaining still another embodiment of the reflective screen of the present invention, and schematically shows a configuration of a horizontal section of the screen.
- the reflection layer 30 is provided in a non-adhesive manner with respect to the horizontal viewing angle expansion layer 20.
- the reflection layer 30 and the horizontal viewing angle expansion layer are provided. 20 are adhered by providing an adhesive layer 70.
- the refractive index of the adhesive or adhesive used for the adhesive layer 70 is determined by the structure of the horizontal viewing angle widening layer 20. It is preferable that the refractive index be different from the refractive index of the material.
- an adhesive layer 70 is formed on the surface of the reflective layer 30, and the adhesive layer 70 is pressed against the surface of the ridge of the horizontal viewing angle enlarging layer 20 to obtain a horizontal viewing angle.
- the reflection layer 30 can be bonded to the corner enlarging layer 20 via the bonding layer 70.
- the reflective layer 30 and the horizontal viewing angle enlarging layer 20 are partially bonded via the adhesive layer 70 in the vicinity of the top of the ridge, and in the non-bonded portion between the ridges.
- a gap 71 is formed between the flat viewing angle enlarging layer 20 and the adhesive layer 70.
- another medium having a different refractive index from that of the horizontal viewing angle widening layer 20 for example, grease or the like, may be sealed in the space 71.
- the thickness of the adhesive layer 70 is set to 20 m, and the reflection (the thickness in the stacking direction) of the horizontal viewing angle enlarging layer 20 having a protrusion of 50 im is reflected through the adhesive layer 70.
- the space between the ridges is formed without filling the entire space between the horizontal viewing angle enlarging layer 20 and the reflective layer 30 with the adhesive layer 70.
- the void 71 may be formed as described above, and the fluidity having a different refractive index from that of the horizontal viewing angle expansion layer 20 may be used.
- the adhesive layer 70 is used to completely fill the gap between the horizontal viewing angle widening layer 20 and the reflective layer 30 with an adhesive or adhesive. It may be.
- the configuration in which the reflection layer 30 is bonded to the horizontal viewing angle expansion layer 20 as described above can be applied to the reflection layer 30 of each of the above-described embodiments.
- FIG. 27 is a view for explaining still another embodiment of the reflection type screen of the present invention, and schematically shows a configuration of a horizontal section of the screen.
- the reflective layer 30 is formed by depositing or applying a material to be the reflective layer 30 on the surface of the horizontal viewing angle expansion layer 20.
- the reflective layer 30 can be formed, for example, by depositing silver or aluminum on the ridge-arranged surface of the layer 20 having a large viewing angle in the horizontal direction, or by applying a material containing these. Further, the reflective layer 30 may be formed by sputtering.
- the reflection layer 30 is a mirror layer formed by depositing, sputtering, or coating silver or aluminum, the reflection efficiency can be increased, and the gain in the front direction of the screen 1 can be improved. Disturbance light incident at a large incident angle with respect to 1 can be prevented from being reflected to the observer side.
- the reflective screen of the present invention can provide a projected image with high contrast by these functions.
- FIG. 27 shows a configuration example in which the reflection layer 30 of the present embodiment is applied to the configuration of FIG. 4 by vapor deposition or coating.
- FIG. FIG. 28 shows a configuration in which the reflective layer 30 is applied
- FIG. 29 shows a configuration in which the reflective layer 30 is applied to the configuration of FIG. 12
- FIG. FIG. 30 shows a configuration to which the reflection layer 30 is applied.
- FIG. 31 is a view for explaining still another embodiment of the reflection type screen of the present invention, and schematically shows a configuration of a horizontal section of the screen.
- a laminated structure may be used without using the transparent resin sheet 10.
- the acrylic resin pie binder is directly applied to the lenticular lens sheet constituting the horizontal viewing angle expansion layer 20 without using the transparent resin sheet 10.
- Layer formation and diffusion layer 40 Similarly, in all of the above-described embodiments, a laminated structure can be realized without using the transparent resin sheet 10 and using the horizontal viewing angle expansion layer 20 as the base sheet.
- FIGS. 32 and 33 show configurations in which a prism sheet and a wave sheet are used as the 7-horizontal viewing angle expansion layer 20 in the configuration of FIG. 31, respectively.
- FIGS. 34 to 36 show examples in which the transparent resin sheet 10 is not used in the configurations of FIGS. 12 to 14, respectively.
- FIGS. 37 to 39 show the configuration of FIGS. 34 to 36 in which the above-described TINT layer 50 is further laminated on the incident side of the diffusion layer 40. is there.
- FIG. 40 illustrates an example in which the configuration of FIG. 21 including the black matrix layer 60 is configured without using the transparent resin sheet 10.
- FIG. 41 to FIG. 43 show that the horizontal viewing angle widening layer is constituted by the cylindrical convex rows formed directly on the transparent resin sheet 10, and the reflective layer 30 is formed by vapor deposition or coating on the convex rows.
- 1 shows an example of a configuration in which a layer is formed.
- the horizontal viewing angle expansion layer is formed by integrally forming a cylindrical shape portion 21 in which cylindrical shapes are continuously arranged on one surface of a transparent resin sheet 10 serving as a base material.
- the cylindrical shape portion 21 is configured such that the longitudinal direction (cylindrical axis direction) of each cylindrical shape is vertical when the screen 1 is installed. Further, it is configured such that the top of the cylindrical shape is located on the reflection layer 30 side.
- the cylindrical shape portion 21 defines the shape of the reflection layer 30.
- the arrangement pitch of the cylindrical shape of the cylindrical shape portion 21 is 200 m or less (1 Z 10 or less of the pixel pitch), and preferably 150 / xm or less, as in the above-described embodiment. Is preferred.
- a reflection layer 30 is formed on the surface of the cylindrical portion 21.
- a diffusion layer 40 is laminated on the surface of the transparent resin sheet 10 opposite to the side on which the cylindrical portion 21 is formed.
- the surface of the diffusion layer 40 is used as an incident surface of the projection light. That is, the screen 1 of the present embodiment Has a configuration in which a diffusion layer 40, a transparent resin sheet 10 serving as a base material, a cylindrical-shaped portion 21, and a reflection layer 30 are arranged in this order from the incident side of the projected light. ing.
- the cylindrical shape portion 21 is formed by applying a photocurable resin layer to one side of the transparent resin sheet 10 and embossing with a mold or a roll having a desired cylindrical shape to form a cylindrical shape. This is created by light curing.
- a cylindrical shape may be directly formed on one side by an embossed hole at the time of molding the transparent resin sheet 10 or in a later step.
- a fine cylindrical shape may be formed by optical processing such as laser processing or photolithography.
- FIG. 42 is a view for explaining still another embodiment of the reflection type screen of the present invention, and schematically shows a configuration of a horizontal section of the screen.
- 30 is a reflective layer
- 31 is a substrate
- 32 is a reflective layer and a reflective sheet around the substrate.
- the reflection layer 30 is formed by attaching a reflection sheet 32 having a reflection function to the cylindrical shape portion 21. That is, a reflective sheet 32 having a reflective layer 30 formed on the surface of a base material 31 is prepared, and the reflective sheet 32 is bonded to the cylindrical shape portion 21. The function of can be obtained.
- a resin sheet can be used as the base material 31.
- a reflection sheet 32 in which a silver or aluminum layer is formed as the reflection layer 30 by vapor deposition, sputtering, coating, or the like on the resin base material 31 is used.
- an aluminum / silver metal foil may be used as the reflective layer 30 to be bonded to the base material 31.
- the above-described metal foil alone may be used without using the resin base material 31. May be used as a reflection sheet. When metal foil is used, the configuration is similar to that of FIG.
- FIG. 43 is a view for explaining still another embodiment of the reflective screen of the present invention, and schematically shows a configuration of a horizontal section of the screen.
- 40a and 40b are dispersed layers
- 1a and 41b are beads used as a diffusion material
- 42a and 42b are transparent resin binders.
- the diffusion layer 40 is composed of two diffusion layers 40a and 40b.
- the particle size, material, and content of the beads 41a and 41b dispersed in the diffusion layers 40a and 40b, respectively are varied to form a layer.
- the HAZE of the diffusion layer 40 (internal HAZE independent of surface roughness) can be controlled separately.
- beads having a plurality of particle sizes may be mixed, and the above particle size distribution may be controlled by the mixing ratio.
- the die screen can be configured as a single sheet of a multi-layer configuration despite having a convex line like the cylindrical shape part 21, thereby providing high productivity and user's convenience. Handling can be facilitated.
- Figs. 44 to 46 show the horizontal viewing angle widening layer composed of prismatic ridges formed directly on the transparent resin sheet 10, and the reflective layer is deposited or coated on the ridges by vapor deposition or coating.
- This shows a configuration example in which layers are formed, and in each figure, 22 is a prism-shaped portion.
- FIGS. 47 to 49 show that the horizontal viewing angle widening layer is constituted by a wave-shaped convex line formed directly on the transparent resin sheet 10, and the reflective layer is vapor-deposited on the convex line.
- FIG. 3 shows an example of a configuration in which a layer is formed by coating.
- FIG. 4 shows a configuration in which the prism-shaped portion 22 or the wave-shaped portion 23 is replaced. Since this embodiment is the same as the first embodiment, repeated description is omitted.
- a cylindrical shape portion 21, a prism shape portion 22, or a wave shape portion 23 is formed directly on the transparent resin sheet 10 and the horizontal shape is formed.
- the configuration of the directional viewing angle widening layer can be applied to the horizontal viewing angle widening layer 20 of FIGS. 4 to 40 described above.
- the reflective layer 30 is formed along the shape of the ridge of the horizontal viewing angle expansion layer 20 by vapor deposition, sputtering, coating, or pasting of the reflection sheet on the horizontal viewing angle expansion layer 20.
- the configuration unlike the configuration using the flat reflective layer as shown in FIGS. 4 to 40, no gap is generated between the convex stripe and the reflective layer 30. Will be determined.
- the reflection surface is a portion which is continuously cylindrical in the horizontal direction with respect to the incident light because the reflection surface is a cylindrical portion.
- a larger spread of the reflected light can be obtained than in a configuration using a flat plate reflector having an air gap between the ridge and the reflective layer 30, thereby providing a wide viewing angle in the horizontal direction of the screen.
- the characteristic power S with little CCR fluctuation can be obtained.
- the wave-shaped surface is close to the one having an R-shape at the apex of the prism, when reflection is performed on the wave-shaped surface, it has both the regression characteristics of the prism and the continuous spread of the cylindrical shape. It becomes a reflection characteristic, thereby realizing a balanced characteristic in viewing angle / luminance CCR.
- any one or more of the transparent resin sheet 10, the horizontal viewing angle widening layer 20, the reflection layer 30, and the diffusion layer 40 are bonded to a partner member by bonding.
- an adhesive or a pressure-sensitive adhesive can be used for bonding.
- a molten resin may be used as the adhesive layer.
- one or both of the two members to be bonded may be subjected to a surface activation treatment such as corona discharge, or may be coated with an anchor agent. Good.
- the adhesive, the pressure-sensitive adhesive, or the adhesive resin / anchor those which do not hinder the optical properties of the screen or those which optimize the physical properties such as the refractive index according to the place of use are selected.
- the material of the transparent resin sheet 10 includes, for example, polyester, polymethyl methacrylate, polyacrylonitrile, polyvinyl chloride, polystyrene, polypropylene, and polypropylene resin. Sheets can be used.
- Examples of the transparent resin binder 42 of the diffusion layer 40 include a vinyl acetate resin, a modified vinyl acetate noacrylic copolymer resin, an ethylene Z vinyl acetate resin, a polyester resin, an acrylic copolymer resin, an acrylic silicone resin, a cellulose resin, Pinyl chloride Z vinyl acetate copolymer resin, styrene resin, urethane resin, epoxy resin, modified polypinyl alcohol resin, acrylonitrile rubber, etc. can be used, but the present invention is not limited to these resins.
- the optimal resin can be selected as needed.
- a screen having the configuration shown in FIG. 23 was used to divide the screen into nine parts, and the screen luminance (G ain) at the center point was measured to measure the contrast at each position.
- FIG. 50 is a diagram for explaining a luminance measuring method.
- Screen 1 is configured as a 50 inch wide screen with a size of 6 2 3 X 1 107 'mm, and 2500 mm from the surface of screen 1 on the normal n at the center of this screen.
- the luminance measuring device 102 was installed at the position of.
- the external light source 100 was placed at a position spaced from the surface of the screen 1 by 1680 mm and displaced by 100 mm upward from the normal line n.
- a projector (projection device) 101 was installed at a position spaced from the surface of the screen 1 by 166 mm and displaced by 165 mm below the normal line n.
- the distance between the screen and the observer (audience) must be at least 1.5 m. Was assumed.
- FIG. 51 is a diagram for explaining a luminance measurement position of the screen 1. As shown in FIG. 51, the screen of the screen 1 was divided into nine equal areas, and the screen luminance (G ain) at the center of each divided region was measured. The luminance measurement was performed by swinging the luminance meter.
- FIG. 52 is a table showing a luminance measurement result and a screen contrast calculation result at each of the above measurement positions.
- the projection light (projection light) 0 & 111 and the disturbance light 0 ain were measured, and the image contrast at each position was calculated.
- Contrast is (Projection light G ain X Projection light illuminance /) + (Disturbance light G ain X Projection light illuminance / ⁇ ) / (Projection light G ain X Projection light illuminance Z ZC on trast) + (External tongue L light G ain X It can be calculated by the external light intensity / ⁇ ).
- Examples of the projected light intensity using a total luminous flux 700 lm 1015. divided by (the lumen) similar projected area 0. 689m 2 7 1 X (lux). The ambient light illuminance is 250 1x, and the contrast of the projector itself is 1200: 1.
- the contrasts are (6.9: 1), (7.2: 1), (6.4: 1): (25.3: 1), (48.7: 1) at measurement positions 1 to 9 in that order. ), (24.9: 1), (51.1: 1), (102.6: 1), and (49.2: 1).
- Gain is 1 regardless of the projected light and disturbance light
- the screen contrast is 5.0: 1.
- the viewing angle (half value) was 17.5 °
- a viewing angle (half value) of 15 ° or more was obtained.
- the present invention it is possible to provide a reflective screen having a high contrast, a good horizontal viewing angle, and a good screen CCR even in a bright room.
- the diffusion is reduced in the vertical direction to improve the bright room contrast, and the relative brightness in the horizontal direction is improved.
- a reflective screen that can improve the contrast that can be applied, can be applied to a large screen, and does not cause deterioration of the CCR.
- the L light of the outer tongue can be absorbed by the TINT layer structure or the black matrix layer, and the black color of the projected image can be tightened.
- the diffusion layer has a multilayer structure, and by separately controlling the surface roughness of the incident surface and the internal haze of the diffusion layer, diffusion of reflected light on the surface of the diffusion layer and reduction of hot spots or hot bands can be achieved. Can be realized.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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AU2003261888A AU2003261888A1 (en) | 2003-05-26 | 2003-09-02 | Reflection type screen |
AU2003268774A AU2003268774A1 (en) | 2003-05-26 | 2003-10-06 | Reflection type screen |
PCT/JP2003/012785 WO2004104695A1 (ja) | 2003-05-26 | 2003-10-06 | 反射型スクリーン |
JP2005516927A JP4083191B2 (ja) | 2003-05-26 | 2003-10-06 | 反射型スクリーン |
GB0525549A GB2419685B (en) | 2003-05-26 | 2003-10-06 | Reflection type screen |
TW093109407A TWI288291B (en) | 2003-05-26 | 2004-04-06 | Reflection type screen |
US10/833,764 US7349154B2 (en) | 2003-05-26 | 2004-04-27 | Reflection type screen |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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JP2003/147116 | 2003-05-26 | ||
JP2003/147079 | 2003-05-26 | ||
JP2003147149 | 2003-05-26 | ||
JP2003147079 | 2003-05-26 | ||
JP2003/147149 | 2003-05-26 | ||
JP2003147116 | 2003-05-26 |
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AU (1) | AU2003261888A1 (ja) |
GB (1) | GB2419685B (ja) |
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- 2003-10-06 GB GB0525549A patent/GB2419685B/en not_active Expired - Fee Related
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2004
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Also Published As
Publication number | Publication date |
---|---|
TW200500784A (en) | 2005-01-01 |
GB0525549D0 (en) | 2006-01-25 |
AU2003261888A1 (en) | 2004-12-13 |
US20040240054A1 (en) | 2004-12-02 |
GB2419685B (en) | 2007-07-04 |
US7349154B2 (en) | 2008-03-25 |
GB2419685A (en) | 2006-05-03 |
TWI288291B (en) | 2007-10-11 |
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