Abstract: A peeking prevention system includes: a display device having a display plane from which to emit linearly polarized light; a partition to delimit from the surroundings a space in which displaying is to be provided by the display device, the partition having a light-transmitting portion through which the inside of the space is viewable; and an optical stack placeable in opposing relationship with the display plane of the display device. The light-transmitting portion includes a transparent substrate and a first polarizing layer, the first polarizing layer having a first absorption axis that is parallel to a first direction. The optical stack includes a second polarizing layer having a second absorption axis that is parallel to a second direction, the second direction being orthogonal to the first direction, and a ½ wave plate at a side of the second polarizing layer facing the display plane.

Abstract: A whiteboard film system includes: a whiteboard film; a plurality of light-emitting devices to emit infrared light onto a surface of the whiteboard film at a viewer's side; and a plurality of photodetection devices to receive the infrared light emitted from the plurality of light-emitting devices, the plurality of photodetection devices being provided so as to at least partly oppose the plurality of light-emitting devices. A whiteboard film includes: a diffuse reflection layer to diffuse-reflect visible light; an absorptive polarizing layer having a first transmission axis that is parallel to a first direction; and a reflective polarizing layer being disposed between the diffuse reflection layer and absorptive polarizing layer and having a second transmission axis that is substantially parallel to the first direction.

Abstract: A writing board set includes a writing board and a writing utensil containing ink. The writing board reflects back, when unpolarized light is incident on its surface at a viewer's side, polarized light which is parallel to a first direction and which has a degree of polarization of 95% or more. Ld*, ad*, and bd* are values of L*, a*, and b* as obtained by irradiating the surface of the writing board with light that has been transmitted through a polarizing layer having a transmission axis which is orthogonal to the first direction, and measuring total reflectance through spectrophotometry. Li*, ai*, and bi* are values of L*, a*, and b* as obtained by irradiating the ink having been introduced onto a surface of a glass panel with unpolarized light, and measuring total reflectance through spectrophotometry. A color difference ?E*ab as defined by eq. (1) is 19 or less: ?E*ab[(Li*?Ld*)2+(ai*?ad*)2+(bi*?bd*)2]1/2??(1).

Abstract: Provided is a polarizing film laminate that is reworkable and excellent in bonding property over a long period of time. The polarizing film laminate includes: a polarizing plate including a polarizer; a first pressure-sensitive adhesive layer; a supporting substrate; and a second pressure-sensitive adhesive layer, which are laminated in the stated order, wherein the second pressure-sensitive adhesive layer surface of the polarizing film laminate has a pressure-sensitive adhesive strength to glass of 1.0 N/25 mm or more at a peel angle of 90° and a peel rate of 300 mm/min.

Abstract: A peeking prevention system has: a display device having, on a front surface of a display screen, a first polarization layer that has a first absorption axis parallel to a first direction; and a room partition that partitions a space in which a display is provided by the display device from a surrounding space, the room partition having a translucent part that makes it possible to see into the space, the translucent part including a transparent substrate and a second polarization layer that is positioned on the space side of the transparent substrate and that has a second absorption axis parallel to a second direction, wherein: the system furthermore has a phase contrast film that is positioned on the front surface of the first polarization layer; the phase contrast layer has a delay axis parallel to a third direction; and transparency is reduced when the display screen is viewed.

Abstract: A whiteboard film (100) according to an embodiment of the present invention includes: a diffuse reflection layer (40) to diffuse-reflect visible light; an absorptive polarizing layer (20) having a first transmission axis that is parallel to a first direction; and a reflective polarizing layer (10) being disposed between the diffuse reflection layer (40) and the absorptive polarizing layer (20) and having a second transmission axis that is substantially parallel to the first direction. A whiteboard (100a) according to an embodiment of the present invention includes: a diffuse reflection plate (40a) to diffuse-reflect visible light; an absorptive polarizing layer (20) having a first transmission axis that is parallel to a first direction; and a reflective polarizing layer (10) being disposed between the diffuse reflection plate (40a) and the absorptive polarizing layer (20) and having a second transmission axis that is substantially parallel to the first direction.

Abstract: The room includes: a ceiling; a floor; and a wall having a pair of wall surfaces opposite to each other, and another pair of wall surfaces opposite to each other in a direction intersecting the pair of wall surfaces. One of the pair of wall surfaces and the other pair of wall surfaces has a window. The wall surface opposite to the wall surface having the window has arranged thereon a first screen. An inner side of the window, and a projection-side surface of the first each has arranged thereon a polarizing plate. An absorption axis direction of a polarizer of the polarizing plate of the window, and an absorption axis direction of a polarizer of the polarizing plate of the first screen and/or an absorption axis direction of a polarizer of the polarizing plate of the second screen are substantially perpendicular or parallel to each other.

Abstract: Provided is a polarizer having a non-polarization portion with reduced shape unevenness. The polarizer of the present invention is a polarizer having a non-polarization portion, in which the non-polarization portion has a shape matching degree of 0.05 or less. In such polarizer, the number of portions where the shape of the non-polarization portion is distorted is small. Accordingly, when the non-polarization portion of the polarizer is used as, for example, a portion corresponding to a camera portion of an image display apparatus, alignment processability is improved and hence the alignment of the camera can be satisfactorily performed.

Abstract: A long polarizer that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, that shows no variation in quality when provided as a final product, and that is excellent in yield in its production. A polarizer according to an embodiment includes a long resin film containing a dichromatic substance, the polarizer having non-polarization portions arranged in a lengthwise direction and/or a widthwise direction at predetermined intervals, the non-polarization portions including decolored portions formed through partial decoloring.

Abstract: A polarizer that can realize the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus. A polarizer including a resin film containing a dichroic substance, wherein the polarizer has a low dichroic substance concentration portion whose content of the dichroic substance is relatively low in the resin film. In the polarizer, the low dichroic substance concentration portion has a content of an alkali metal and/or an alkaline earth metal of 3.6 wt % or less.

Abstract: There is provided a projection screen optical laminate, which can achieve a projection screen that does not impair an interior appearance, can be produced at reasonable cost, and can achieve a projected image that achieves both of excellent contrast and an excellent viewing angle characteristic. A projection screen optical laminate according to an embodiment of the present invention includes: a polarizer; a high-haze layer; and a retardation layer. The high-haze layer has a haze of 90% or more, and a total light transmittance of 80% or more, and the retardation layer has an in-plane retardation Re(550) of from 100 nm to 200 nm.

Abstract: The room includes: a ceiling; a floor; and a wall having a pair of wall surfaces opposite to each other, and another pair of wall surfaces opposite to each other in a direction intersecting the pair of wall surfaces. One of the pair of wall surfaces and the other pair of wall surfaces has a window. The wall surface opposite to the wall surface having the window has arranged thereon a first screen. An inner side of the window, and a projection-side surface of the first each has arranged thereon a polarizing plate. An absorption axis direction of a polarizer of the polarizing plate of the window, and an absorption axis direction of a polarizer of the polarizing plate of the first screen and/or an absorption axis direction of a polarizer of the polarizing plate of the second screen are substantially perpendicular or parallel to each other.

Abstract: A projector of this invention reduces light quantity loss and is capable of achieving a projected image retaining a desired hue. The projector includes; a color separation optical system configured to separate light from a light source into red light, green light, and blue light; light modulation apparatus configured to modulate each of the red light, the green light, and the blue light in accordance with image information to generate image light; a color composition optical system configured to composite the image light of the modulated red light, the image light of the modulated green light, and the image light of the modulated blue light; a projection optical system configured to project the composited image light; and a retardation element and a polarizing element, which are arranged between the color composition optical system and the projection optical system in the stated order from a color composition optical system side.

Abstract: A long polarizer that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, that shows no variation in quality when provided as a final product, and that is excellent in yield in its production. A polarizer according to an embodiment of the present invention includes a long resin film containing a dichromatic substance, the polarizer having non-polarization portions arranged in a lengthwise direction and/or a widthwise direction at predetermined intervals, the non-polarization portions including decolored portions formed through partial decoloring.

Abstract: A polarizer that can realize the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus. A polarizer 1 including a resin film containing a dichromatic substance, wherein the polarizer has a low dichromatic substance concentration portion whose content of the dichromatic substance is relatively low in the resin film. The low dichromatic substance concentration portion 2 is brought into contact with an acidic solution. The low dichromatic substance concentration portion corresponds to a camera portion of an image display apparatus on which the polarizer is mounted.

Abstract: A long polarizer that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, that shows no variation in quality when provided as a final product, and that is excellent in yield in its production. A polarizer including a long resin film containing a dichromatic substance, the polarizer having non-polarization portions arranged in a lengthwise direction and/or a widthwise direction at predetermined intervals, the non-polarization portions including decolored portions formed through partial decoloring.

Abstract: A polarizer that can realize the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus. A polarizer including a resin film containing a dichroic substance, wherein the polarizer has a low dichroic substance concentration portion whose content of the dichroic substance is relatively low in the resin film. In the polarizer, the low dichroic substance concentration portion has a content of an alkali metal and/or an alkaline earth metal of 3.6 wt % or less.

Abstract: There is provided a polarizer having a non-polarization portion that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, the polarizer being excellent in dimensional stability and external appearance of the non-polarization portion. A polarizer according to an embodiment of the present invention includes a resin film containing a dichromatic substance, wherein: the polarizer has a non-polarization portion at a predetermined position; and the non-polarization portion includes a thin-walled portion thinner than another portion of the resin film.

Abstract: A room air conditioning system includes a plurality of indoor units and a controller. Each of the plurality of indoor units includes: an air conditioner main body having a plurality of blow-off openings formed therein; a plurality of flaps rotatably that are disposed in the respective blow-off openings and that can independently change vertical angles of airflows; and a human body sensor that detects whether a person is present below a corresponding one of the plurality of indoor units. When at least one of the human body sensors in the plurality of indoor units detects the absence of a person in a state of selecting the airflow control, the controller causes a corresponding one of the indoor units that detects the absence to perform the temperature evenness control. This room air conditioning system successfully reduces unevenness of room temperature.

Abstract: A long polarizing film laminate capable of producing a polarizer that can achieve the multi-functionalization and high-functionalization of an electronic device, such as an image display apparatus, that shows no variation in quality when provided as a final product, and that is excellent in yield in its production. A polarizing film laminate according to an embodiment of the present invention includes: a long polarizer; and a surface protective film arranged on one surface side of the polarizer. The polarizing film laminate has, on the one surface side, exposed portions where the polarizer is exposed. The exposed portions are arranged in a lengthwise direction and/or a widthwise direction of the polarizer at predetermined intervals.