Abstract: A projection display apparatus according to an embodiment of the present disclosure includes: a light source unit; an image formation unit including a display device that modulates light from the light source unit on a basis of an inputted picture signal to generate a projection image; a projection unit that projects projection light generated by the display device; a signal processing unit that acquires the picture signal and performs signal processing; a correction unit including a first variation weight coefficient summation section that acquires the picture signal processed by the signal processing unit, and calculates a focus variation amount of the projection unit in accordance with a light intensity distribution of light entering the projection unit; and a focus control unit that performs focus adjustment on the projection unit on a basis of information obtained from the correction unit.

Abstract: A projection display apparatus (1) according to one embodiment of the present disclosure includes: a light source section (110); an image formation section (300) including a display device (310) that modulates light from the light source section on the basis of an input picture signal to generate a projection image; a projection section (400) that projects image light generated by the display device; an unnecessary light processing section (610) to which unnecessary light that does not contribute to a generation of the projection image is to be applied, out of light to be applied to the display device; and a heat circulation section (620) that spatially and mechanically couples the projection section and the unnecessary light processing section, or couples spatially and via a fluid the projection section and the unnecessary light processing section.

Abstract: A lens shift mechanism of one embodiment of the present disclosure includes: a projection lens; a cylindrical housing that holds the projection lens; and an operating unit that moves the cylindrical housing in one axial direction perpendicular to an optical axis of the projection lens. The operating unit includes a pair of a main shaft and a countershaft extending in the one axial direction and disposed to be opposed to each other across the cylindrical housing, and a pair of elastic bodies provided respectively for the main shaft and the countershaft. The pair of elastic bodies are parallel to the one axial direction, and have biasing directions opposite to each other.

Abstract: An image projection device including: an analysis unit configured to compute a functional state of one or more devices included in the image projection device based on sensor information acquired from one or more sensors; a determination unit to determine whether or not maintenance of the devices is necessary based on the functional state of the devices; and a notification control unit to present guidance information that prompts for implementation of maintenance of the devices to a user through a notification unit at a timing when it is determined by the determination unit that maintenance is necessary.

Abstract: An illuminating unit includes a light-guiding section including a plurality of light-guiding plates, in which the light-guiding plates are stacked in a thickness direction and each have a light entrance section and a light output surface, a plurality of light sources that output light toward the light entrance sections of the respective light-guiding plates of the light-guiding section, and a substrate that supports the plurality of light sources and on which a circuit section is disposed, in which the circuit section drives each of the light sources. A first portion, on which the circuit section is disposed, of the substrate is disposed in opposition to a back surface of the light-guiding section.

Abstract: An image display apparatus according to an embodiment of the present technology includes a light source section (610, 650), an optical element (620), and a holding section. The light source section (610, 650) emits light. The optical element (620) includes a light reflection part (626, 656) and a light transmission part (627, 657) provided at a position different from a position of the light reflection part (626, 656). The holding section movably or rotatably holds the optical element (620) and is capable of switching, for example, between a first state in which the light reflection part (626, 656) is arranged on a light path of the emitted light of the light source section (610) and a second state in which the light transmission part (627, 657) is arranged on the light path of the emitted light of the light source section (610).

Abstract: A lens shift mechanism of one embodiment of the present disclosure includes: a projection lens; a cylindrical housing that holds the projection lens; and an operating unit that moves the cylindrical housing in one axial direction perpendicular to an optical axis of the projection lens. The operating unit includes a pair of a main shaft and a countershaft extending in the one axial direction and disposed to be opposed to each other across the cylindrical housing, and a pair of elastic bodies provided respectively for the main shaft and the countershaft. The pair of elastic bodies are parallel to the one axial direction, and have biasing directions opposite to each other.

Abstract: To provide an image projection unit that can reduce the frequency of filter replacement and extend the life of an image projection device main body. Provided is an image projection unit including: a main body (10) of an image projection device; and a filter box (100A) that can be attached/detached to/from the main body (10), and at least covers an air inlet of the main body. A box-side filter provided for the filter box (100A) has a total area larger than an area of a main body filter provided at the air inlet of the main body (10).

Abstract: An image display apparatus according to an embodiment of the present technology includes a light source section (610, 650), an optical element (620), and a holding section. The light source section (610, 650) emits light. The optical element (620) includes a light reflection part (626, 656) and a light transmission part (627, 657) provided at a position different from a position of the light reflection part (626, 656). The holding section movably or rotatably holds the optical element (620) and is capable of switching, for example, between a first state in which the light reflection part (626, 656) is arranged on a light path of the emitted light of the light source section (610) and a second state in which the light transmission part (627, 657) is arranged on the light path of the emitted light of the light source section (610).

Abstract: To provide an image projection unit that can reduce the frequency of filter replacement and extend the life of an image projection device main body. Provided is an image projection unit including: a main body (10) of an image projection device; and a filter box (100A) that can be attached/detached to/from the main body (10), and at least covers an air inlet of the main body. A box-side filter provided for the filter box (100A) has a total area larger than an area of a main body filter provided at the air inlet of the main body (10).

Abstract: [Object] To provide an image projection device capable of prompting to implement maintenance at an appropriate timing. [Solution] There is provided an image projection device including: an analysis unit configured to compute a functional state of one or more devices included in the image projection device on the basis of sensor information acquired from one or more sensors; a determination unit configured to determine whether or not maintenance of the devices is necessary on the basis of the functional state of the devices; and a notification control unit configured to present guidance information that prompts for implementation of maintenance of the devices to a user through a notification unit at a timing when it is determined by the determination unit that maintenance is necessary.

Abstract: [Object] To propose a projection display device that includes a filter structural body that is excellent in pressure-loss recoverability and can be miniaturized. [Solution] There is provided a projection display device, including: a filter structural body in which a plurality of filters each including a folding structure in which a concavity-convexity is repeated are stacked. In the filter structural body, respective convex portions of the filters are made to coincide, and between a pitch of any of the filters, one concave portion or a plurality of concave portions of another filter is or are accommodated, and in an inside of the filter having a maximum length in a vertical direction relative to a filter surface, another filter is accommodated.

Abstract: There is provided a display device including: a display cell (20); a surrounding member (30) provided around the display cell (20); a cover film (10) provided on front side of the display cell (20) and the surrounding member (30); a relay member (40) provided on rear side of the display cell (20) and the surrounding member (30), and facing a margin between the display cell (20) and the surrounding member (30); and an adhesive layer (50) provided between the display cell (20) and the relay member (40), and between he surrounding member (30) and the relay member (40).

Abstract: An illuminating unit includes: a light-guiding section including a plurality of light-guiding plates, in which the light-guiding plates are stacked in a thickness direction and each have a light entrance section and a light output surface; a plurality of light sources that output light toward the light entrance sections of the respective light-guiding plates of the light-guiding section; and a substrate that supports the plurality of light sources and on which a circuit section is disposed, in which the circuit section drives each of the light sources. A first portion, on which the circuit section is disposed, of the substrate is disposed in opposition to a back surface of the light-guiding section.

Abstract: There is provided a display device including a display cell (20); a surrounding member (30) provided around the display cell (20), a cover film (10) provided on front side of the display cell (20) and the surrounding member (30); a relay member (40) provided on rear side of the display cell (20) and the surrounding member (30), and facing a margin between the display cell (20) and the surrounding member (30); and an adhesive layer (50) provided between the display cell (20) and the relay member (40), and between he surrounding member (30) and the relay member (40).

Abstract: There is provided a display apparatus including a display that has a display face on which an image is displayed, a back chassis that is disposed on a side opposite to the display face of the display, and a cover film that is positioned in a state in which the cover film reaches the back chassis from the display face, one end of the cover film being attached to at least a portion of an outer circumferential portion of the display. The display is held by the cover film.

Abstract: There is provided a display device including a display in which an image is displayed on a display surface, and a back chassis that is disposed on a surface opposite to the display surface of the display. A display holding portion that holds the display is provided in the back chassis.

Abstract: Provided is a display device, including: a device main body including a display, the display including a display surface, the display surface being configured to display an image; and a stand configured to support the device main body. The stand includes a supported portion, the supported portion being slidably supported on a surface opposite to the display surface of the device main body, and a connection portion, the connection portion being rotatable with respect to the supported portion around a hinge shaft.

Abstract: Provided is an attachment structure including an attachment portion formed by cutting and erecting a processing portion provided as an inner portion of a notch formed on a plate-like base surface portion and bending the processing portion in a predetermined shape. One of an inner portion of the attachment portion on the base surface portion and the attachment portion has a screw groove to which an attachment screw is to be screwed formed therein.

Abstract: Provided is an attachment structure including an attachment portion formed by cutting and erecting a processing portion provided as an inner portion of a notch formed on a plate-like base surface portion and bending the processing portion in a predetermined shape. One of an inner portion of the attachment portion on the base surface portion and the attachment portion has a screw groove to which an attachment screw is to be screwed formed therein.