Abstract: An image display system according to an embodiment of the present technology includes an image display unit, an acquisition unit, and a display control unit. The image display unit is capable of displaying an image and moves in association with a movement of a user. The acquisition unit acquires movement information regarding a movement of the image display unit. The display control unit causes the image display unit to execute suppression image display for suppressing an influence of the movement of the image display unit with respect to an external space on the basis of the acquired movement information.

Abstract: A lens position adjusting mechanism includes a lens, a lens attachment frame that includes a lens holding portion for holding the rim of the lens, and a holding case that sandwiches the lens attachment frame movably in a plane direction perpendicular to an optical axis of the lens. The lens attachment frame includes a shaft portion on the periphery of the lens holding portion, functioning as a fulcrum at a time when the lens attachment frame moves in the plane direction. The holding case includes a shaft supporting portion for supporting the shaft portion and frame guide grooves for sandwiching the lens attachment frame. The position of the lens is adjusted by operating a lug portion by fingers or the like with the shaft portion as a fulcrum. Then the adjusted position is fixed by injecting an adhesive into wedge spaces formed of opposing adhesion grooves.

Abstract: A lens array element has a rectangular plate-like external shape, and includes plate surfaces that functions as light transmission surfaces; and a plurality of cellular lenses that are formed on at least one of the plate surfaces. Each of end faces 4 of the rectangular plate-like external shape forms an inclined surface that slants inward from a plate surface 6 on one side toward a plate surface 2 on the other side, and a reference surface 5 perpendicular to the plate surface is formed on a part of at least two adjoining end faces among the end faces. A front view shape of the reference surface region arranged side-by-side with the inclined surface of the end face is a trapezoid, an oblique side 7 of the trapezoid is disposed so as to extend from a plate surface on one side toward the plate surface 2 on the other side, and an upper side 9 of the trapezoid is disposed on a side of the other of the plate surfaces.

Abstract: A polarization converting element includes: a main body that is made from a transparent member; an incident section that is provided to the main body, and upon which light generated from a light source is incident; an annular reflecting section that is formed on the periphery of the incident section; and a polarization splitting section that is formed opposite to the annular reflecting section on the emission side of light incident upon the incident section. One polarized light component of the incident light passes through the main body and is emitted from the polarization splitting section. Another polarized light component of the incident light is reflected towards the annular reflecting section by the polarization splitting section, and is emitted from the polarization splitting section after having again been reflected by the annular reflecting section and having been converted into light of a same polarization component as the light of the one polarized light component.

Abstract: An optical position of a display device with respect to an optical axis of a projection optical system is displaced in a direction perpendicular to the optical axis in accordance with a change in the size of a projected image. For instance, a transparent flat plate is disposed in front of a projection lens, and the transparent flat plate is tilted in association with a rotation of a zoom adjustment ring. As the transparent flat plate is tilted, the apparent position of the display device relative to the projection lens is displaced in the direction perpendicular to the optical axis of the projection optical system. Thereby, the projected image on a screen is located at a proper position corresponding to a zoom state. Tilt control of the transparent flat plate is realized by a cam mechanism, for instance.

Abstract: Adjustment of the illumination range to a liquid crystal panel of a liquid crystal projector requires time in fixing upon adjustment and accordingly it is an object to make the adjustment effectively. In an adjustment mechanism of the illumination range of illumination means to the liquid crystal panel in an optical engine unit of the liquid projector, the spring property is provided in a lens holder for holding a lens and the lens is temporarily held by friction of the spring portion to the optical engine case after adjustment. Then, the adhesion processing is made to complete the adjustment.

Abstract: Images with enhanced resolution are created with a display device comprising a non-transmissive light valve including addressable pixels, a light source that directs light to the light valve, and a lens positioned between the light valve and the light source, the lens directing light from the light source to the pixels on the light valve and the light valve directing light to viewing optics. The light valve is an integrated circuit ferroelectric liquid crystal device (ICFLCD), or other light valve arrays such as a digital light processor (DLP) display, having an array of addressable pixels. Such light valves may be mounted in a head mounted display.

Abstract: The present invention provides a technique for readily changing the design of a projector. A projector comprises: an illumination optical system; a light modulation device; a projection optical system; and a base frame for mounting a plurality of optical components disposed on a light path from the optical illumination system to the projection optical system. The illumination optical system 300 comprises: a light source 20; a lens array 320; and a superimposing lens system 370. The base frame includes a positioning section for positioning the superimposing lens system 370. The superimposing lens system 370 includes at least two lenses 371 and 372. The first lens 371 is provided at a position nearest to the light source and mainly determines an F-number of the illumination optical system. The second lens 372 is provided at a position furthest from the light source and mainly determines a magnification of the illumination optical system.

Abstract: To increase the usage efficiency of the light of optical elements used in a projection display device, a polarizing conversion unit is provided. This polarizing conversion unit consists of a unit frame, two polarizing conversion element arrays, a light-shielding plate, a lens array, and clips. From the side of one open surface of the unit frame, the two polarizing conversion element arrays are inserted, and the light-shielding plate and the lens array are inserted from the side of the other open surface in this order. These optical elements are clamped by four clips from the two directions of up and down in a state of being stored in the unit frame. Since the clips are formed of an elastic body, the clips can be easily attached and detached, and the respective parts of the polarizing conversion unit can also be easily attached and detached to and from the unit frame. In addition, these optical elements may be sequentially inserted from the side of one open surface.

Abstract: To increase the usage efficiency of the light of optical elements used in a projection display device, a polarizing conversion unit is provided. This polarizing conversion unit consists of a unit frame, two polarizing conversion element arrays, a light-shielding plate, a lens array, and clips. From the side of one open surface of the unit frame, the two polarizing conversion element arrays are inserted, and the light-shielding plate and the lens array are inserted from the side of the other open surface in this order. These optical elements are clamped by four clips from the two directions of up and down in a state of being stored in the unit frame. Since the clips are formed of an elastic body, the clips can be easily attached and detached, and the respective parts of the polarizing conversion unit can also be easily attached and detached to and from the unit frame. In addition, these optical elements may be sequentially inserted from the side of one open surface.

Abstract: A reflection-type overhead projector having a projection lamp and projection lens-and-mirror system disposed above a base on a gooseneck arm for projecting a transparency placed on the base on a remote screen. The overhead projector has a copying device incorporated therein for making a copy from a reflective original on a secondary original or a transparency, which comprises an image-scanning head movable lengthwise over the reflective original placed on a Fresnel mirror on the base to provide image signals; a mirror attached to the image scanning head for directing light from the projection lamp onto the reflective original just below the image scanning head; and a thermal printing head for thermally printing an image of the reflective original on a secondary original or a transparency according to the image signals.

Abstract: An over head projector has a standard projection lens for projecting the whole view of an original image and a partial projection lens for projecting a part of the original image in enlarged scale. One of the projection lenses is selectively brought to a projection position for projecting the original image onto a projection screen. A stage for supporting the original image is vertically movable and is moved up and down when the projection lens is changed. The selection of the projection lens and the vertical movement of the stage are associated with each other so that the original image is always at a proper position with respect to the focal length of the selected projection lens.