A control device controls sound of a plurality of speakers. The control device includes: a generation unit acquiring image data and generates display image data from the image data by using conversion processing using shape information indicating a shape of a display surface; a display controller displaying a display image on the display surface by using the display image data; a receiver causing a cursor to be superimposed and displayed on the display image and receives position designation related to the plurality of speakers on the display image from a user who has visually recognized the cursor; and an identification unit calculating a position of the cursor from the position designation by referring to a correspondence relationship between the image data before the conversion processing and the display image data after the conversion processing, and identifying the position of the cursor as a position related to the plurality of speakers.

A management information display system includes: a management state detecting unit configured to detect a placement state of an object placed on a predetermined placement area such that the object is able to be taken out; a projecting device configured to be capable of projecting a projection image onto the placement area; and a control device configured to: determine, based on a detection result from the management state detecting unit, whether or not the object has been taken out from the placement area; set projection information including information on the object that has been taken out, when the control device determines that the object has been taken out; and control the projecting device such that the projection image representing the projection information is projected onto a position where the object had been placed on the placement area.

A management information display system includes: a management state detecting unit configured to detect a placement state of an object placed on a predetermined placement area such that the object is able to be taken out; a projecting device configured to be capable of projecting a projection image onto the placement area; and a control device configured to: determine, based on a detection result from the management state detecting unit, whether or not the object has been taken out from the placement area; set projection information including information on the object that has been taken out, when the control device determines that the object has been taken out; and control the projecting device such that the projection image representing the projection information is projected onto a position where the object had been placed on the placement area.

An information processing device comprising a projection control unit that controls projection of drawing information, the projection being performed by a projection device, on a basis of ratio information between a first distance and a second distance, the first distance being acquired from sensing information regarding a drawing tool and being from a reference point to the drawing tool, and the second distance being from the reference point to an intersection point between a straight line connecting the reference point with the drawing tool and a calibration plane.

A light source apparatus includes a plurality of light emitting apparatuses. Each of the light emitting apparatuses includes a plurality of light emitting devices each of which has a light emitting area and a non-light emitting area on an emission surface thereof that emits light. At least two light emitting apparatuses of the light emitting apparatuses constitute a light emitting apparatus group disposed such that the emission surfaces of the respective light emitting apparatuses are parallel to each other with a predetermined distance, and that a distance between light emitting areas of the respective light emitting apparatuses when viewed along a direction perpendicular to the emission surfaces of the at least two of the light emitting apparatuses is shorter than a distance between the light emitting areas of the respective light emitting apparatuses when the emission surfaces of the respective light emitting apparatuses are on the same plane.

A mirror driving mechanism includes a plate-shaped base portion, a mirror that is installed at the base portion, and a temperature detecting section that is installed at the base portion and that detects a temperature of the base portion. The base portion includes a thin portion that is disposed away from an outer edge of the base portion and that has a through hole extending through the base portion in a plate-thickness direction of the base portion, a thick portion that is connected to the thin portion, that is thicker than the thin portion in the plate-thickness direction of the base portion, and that extends along the outer edge so as to surround the thin portion, and a first shaft portion extends into the through hole from an outer periphery of the through hole.

An optical aperture multiplier includes a first optical waveguide (10) having a rectangular cross-section and including partially reflecting surfaces (40) at an oblique angle to a direction of elongation of the waveguide. A second optical waveguide (20), also including partially reflecting surfaces (45) at an oblique angle, is optically coupled with the first optical waveguide (10). An image coupled into the first optical waveguide with an initial direction of propagation at an oblique coupling angle advances by four-fold internal reflection along the first optical waveguide, with a proportion of intensity of the image reflected at the partially reflecting surfaces so as to be coupled into the second optical waveguide, and then propagates through two-fold reflection within the second optical waveguide, with a proportion of intensity of the image reflected at the partially reflecting surfaces so as to be directed outwards from one of the parallel faces as a visible image.

An optical aperture multiplier includes a first optical waveguide (10) having a rectangular cross-section and including partially reflecting surfaces (40) at an oblique angle to a direction of elongation of the waveguide. A second optical waveguide (20), also including partially reflecting surfaces (45) at an oblique angle, is optically coupled with the first optical waveguide (10). An image coupled into the first optical waveguide with an initial direction of propagation at an oblique coupling angle advances by four-fold internal reflection along the first optical waveguide, with a proportion of intensity of the image reflected at the partially reflecting surfaces so as to be coupled into the second optical waveguide, and then propagates through two-fold reflection within the second optical waveguide, with a proportion of intensity of the image reflected at the partially reflecting surfaces so as to be directed outwards from one of the parallel faces as a visible image.

A reflective screen including a Fresnel lens-shaped lens layer having unit lenses and a reflective layer formed on the unit lenses for reflecting light. The unit lens protrudes from a video source side to a back surface side in the thickness direction of the lens layer. In the lens layer, a flat part having a flat surface f on the back surface side is formed at at least one end edge. In the thickness direction of the lens layer, a maximum lens height h1max of a lens height h1 that is the distance from a position closest to the video source side to a position closest to the back surface side, and a flat surface height h2 that is the distance from the position closest to the video source side of the unit lens to the flat surface f of the flat part 114 satisfy h2≥h1max.

Content data representing content that includes at least one or more components is acquired. Projection area data representing a projection area is acquired. A deteriorated part, which is a part where a projection condition is deteriorated in the projection area, is identified based on the projection area data. A priority of the component included in the content is identified. Display deterioration of the content, which is caused by the deteriorated part, is suppressed based on a position of the identified deteriorated part in the projection area, the content data displayed on the projection area, a threshold according to the identified priority, and a degree of deterioration indicative of a level of deterioration of the component.