Abstract: A projection device includes a projection unit including a display element in which pixel lines each formed by pixels arranged in a first direction are arranged in a second direction and an optical system that projects light emitted from the display element and projecting an image based on input image data, a first correction unit for correcting a scale of each line data of the image data that corresponds to each of the pixel lines, a second correction unit for correcting a second-direction scale of each pixel data of the image data after the correction performed by the first correction unit, and an image cutting-out unit for cutting out image data of an area, which is projected from the projection unit, of the image data after the correction performed by the second correction unit and input the image data of the area to the projection unit.

Abstract: A projector includes, a projecting unit that converts image data into light and projects the light at a predetermined angle of view, a projecting direction changing unit that changes the projecting direction of the projecting unit from a first projecting direction to a second projecting direction, a projection angle derivation unit that derives a projection angle between the first projecting direction and a projecting direction after changed, and an image cutting out unit that generates cut-out image data that a part of a region of an image of the inputted image data is cut out based on the angle of view and the projection angle as image data to be projected, when the projecting unit projects the image of the inputted image data stored on the storage unit across the first projecting direction and the second projecting direction.

Abstract: A projection device includes a correction unit that corrects a trapezoidal distortion of a projection image projected onto a projection medium in accordance with a projection angle derived by a projection angle deriving unit, and the correction unit sets a correction amount for the trapezoidal distortion of a case where the derived projection angle is changed within a range larger than a first predetermined angle determined based on the projection direction toward a boundary between a first projection face and a second projection face and smaller than a second predetermined angle determined based on the projection direction toward the boundary to be the correction amount for the trapezoidal distortion at one of the first predetermined angle and the second predetermined angle or less.

Abstract: An image projection apparatus includes a light modulation device that modulates light according to image data; a projecting unit that projects modulated light; an angle-of-view deriving unit that derives an angle of view at which modulated light is projected; a projection-direction changing unit that changes a projection direction from a first direction to a second direction; a projection-angle deriving unit that derives a projection angle between the first direction and a changed projection direction; a storage unit that stores image data; and an image cutting unit that generates cut-out image data by cutting a part of the image data based on the angle of view and the projection angle as image data projected from the first direction through the second direction, and the minimum variable angle is determined based on the angle of view and a size of an effective region of the modulated light.

Abstract: An display apparatus, for a vehicle, according to one embodiment includes a substrate housing portion, an optical unit, a turning member, and a plate-like attachment plate. The substrate housing portion contains a circuit substrate for outputting an image signal of an image to be displaced. The optical unit generates an image based on the image signal outputted from the circuit substrate and projects the generated image. The combiner is provided at one end of the optical unit, and the image is projected onto the combiner. The turning member connects the optical unit to the substrate housing portion in a freely rotatable manner. The plate-like attachment plate is used to mount the substrate housing portion to a rear-view mirror such that the optical unit is freely rotatable without coming into contact with the rear-view mirror inside a vehicle.

Abstract: A projection device includes a projection unit including a display element in which pixel lines each formed by pixels arranged in a first direction are arranged in a second direction and an optical system that projects light emitted from the display element and projecting an image based on input image data, a first correction unit for correcting a scale of each line data of the image data that corresponds to each of the pixel lines, a second correction unit for correcting a second-direction scale of each pixel data of the image data after the correction performed by the first correction unit, and an image cutting-out unit for cutting out image data of an area, which is projected from the projection unit, of the image data after the correction performed by the second correction unit and input the image data of the area to the projection unit.

Abstract: In a projector, a projection unit includes a projection mechanism that projects an image and an air hole that takes in or exhausts air used to dissipate heat generated from a light source included in the projection mechanism. A housing covers the air hole when the projection unit is in a storage position in which the projection unit does not project an image and uncovers the air hole when the projection unit is in a projection position in which the projection unit projects an image. The drive mechanism moves the projection unit or a cover member. An electronic control unit controls the drive mechanism to move the projection unit to the projection position in which an image is projected when receiving a predetermined projection preparation request and move the projection unit to the storage position in which no image is projected when receiving a predetermined storage request.

Abstract: An display apparatus, for a vehicle, according to one embodiment includes a substrate housing portion, an optical unit, a turning member, and a plate-like attachment plate. The substrate housing portion contains a circuit substrate for outputting an image signal of an image to be displaced. The optical unit generates an image based on the image signal outputted from the circuit substrate and projects the generated image. The combiner is provided at one end of the optical unit, and the image is projected onto the combiner. The turning member connects the optical unit to the substrate housing portion in a freely rotatable manner. The plate-like attachment plate is used to mount the substrate housing portion to a rear-view mirror such that the optical unit is freely rotatable without coming into contact with the rear-view mirror inside a vehicle.

Abstract: A projection device includes a correction unit that corrects a trapezoidal distortion of a projection image projected onto a projection medium in accordance with a projection angle derived by a projection angle deriving unit, and the correction unit sets a correction amount for the trapezoidal distortion of a case where the derived projection angle is changed within a range larger than a first predetermined angle determined based on the projection direction toward a boundary between a first projection face and a second projection face and smaller than a second predetermined angle determined based on the projection direction toward the boundary to be the correction amount for the trapezoidal distortion at one of the first predetermined angle and the second predetermined angle or less.

Abstract: An image projection apparatus includes a light modulation device that modulates light according to image data; a projecting unit that projects modulated light; an angle-of-view deriving unit that derives an angle of view at which modulated light is projected; a projection-direction changing unit that changes a projection direction from a first direction to a second direction; a projection-angle deriving unit that derives a projection angle between the first direction and a changed projection direction; a storage unit that stores image data; and an image cutting unit that generates cut-out image data by cutting a part of the image data based on the angle of view and the projection angle as image data projected from the first direction through the second direction, and the minimum variable angle is determined based on the angle of view and a size of an effective region of the modulated light.

Abstract: A projector includes, a projecting unit that converts image data into light and projects the light at a predetermined angle of view, a projecting direction changing unit that changes the projecting direction of the projecting unit from a first projecting direction to a second projecting direction, a projection angle derivation unit that derives a projection angle between the first projecting direction and a projecting direction after changed, and an image cutting out unit that generates cut-out image data that a part of a region of an image of the inputted image data is cut out based on the angle of view and the projection angle as image data to be projected, when the projecting unit projects the image of the inputted image data stored on the storage unit across the first projecting direction and the second projecting direction.

Abstract: A first linearly polarized bundle of rays of incident rays is converted by optical modulation with an input video signal into a second linearly polarized bundle of rays orthogonal to the first rays in polarization. The first rays pass through a polarizer before optically modulated. A second linearly polarized bundle of rays originally involved in the incident rays is reflected by the polarizer in a first direction. The second rays obtained by the optical modulation are reflected by the polarizer in a second direction. The second rays reflected in the second direction pass through another polarizer. A first linearly polarized bundle of rays involved in the reflected second rays is reflected by the other polarizer. The reflected first rays is detected by an optical sensor that is positioned outside an optical path of the second rays originally involved in the incident rays and reflected in the first direction.

Abstract: In a projector, a projection unit includes a projection mechanism that projects an image and an air hole that takes in or exhausts air used to dissipate heat generated from a light source included in the projection mechanism. A housing covers the air hole when the projection unit is in a storage position in which the projection unit does not project an image and uncovers the air hole when the projection unit is in a projection position in which the projection unit projects an image. The drive mechanism moves the projection unit or a cover member. An electronic control unit controls the drive mechanism to move the projection unit to the projection position in which an image is projected when receiving a predetermined projection preparation request and move the projection unit to the storage position in which no image is projected when receiving a predetermined storage request.

Abstract: A first linearly polarized bundle of rays of incident rays is converted by optical modulation with an input video signal into a second linearly polarized bundle of rays orthogonal to the first rays in polarization. The first rays pass through a polarizer before optically modulated. A second linearly polarized bundle of rays originally involved in the incident rays is reflected by the polarizer in a first direction. The second rays obtained by the optical modulation are reflected by the polarizer in a second direction. The second rays reflected in the second direction pass through another polarizer. A first linearly polarized bundle of rays involved in the reflected second rays is reflected by the other polarizer. The reflected first rays is detected by an optical sensor that is positioned outside an optical path of the second rays originally involved in the incident rays and reflected in the first direction.

Abstract: A bundle of rays is incident in a lens array and converted into sub-bundles of rays. The sub-bundles of rays are separated by a color separator into first and second sub-bundles of rays of different colors. The first and the second sub-bundles of rays are combined by other lens arrays into a first and a second bundle of rays of uniform illuminance, respectively. The first and second bundle of rays of uniform illuminance are applied polarization beam splitting and then polarization angle conversion by polarization converters, to be converted into first and second linearly polarized beams, respectively. The second linearly polarized beams are separated by a color separator, provided on an optical path of the second linearly polarized beams, into third and fourth linearly polarized beams of different colors.

Abstract: An optical color separation and synthesis system is constructed according to a method, in which four first to fourth polarization beam splitters are arranged in such a manner that polarization separating surfaces of the polarization beam splitters form an X-shape, a predetermined gap is formed between facing surfaces of the polarization beam splitters before bonding the polarization beam splitters onto a base platform, and thereafter a frame comprising an opening in a middle portion thereof and a stepped portion to be bonded to an optical function plate in a peripheral portion thereof is secured to any of the first to fourth polarization beam splitters.

Abstract: There is disclosed a method of constructing an optical color separation and synthesis system, in which four first to fourth polarization beam splitters are arranged in such a manner that polarization separating surfaces of the polarization beam splitters form an X-shape, a predetermined gap is formed between facing surfaces of the polarization beam splitters before bonding the polarization beam splitters onto a base platform, and thereafter a frame comprising an opening in a middle portion thereof and a stepped portion to be bonded to an optical function plate in a peripheral portion thereof is secured to any of the first to fourth polarization beam splitters.

Abstract: By mounting a projection lens to a first supporting member for fixing spatial light modulators, polarization beam splitters and a cross dichroic prism, and providing a second supporting member having a thermal expansion coefficient larger than that of the first supporting member between the projection lens and the first supporting member, afluctuation of distance between the spatial light modulators and the projection lens due to heat generated by a light source lamp of a projection type display apparatus and temperature change in use environment can be canceled so that an optimum projected image having nothing to do with being out of focus can always be obtained.

Abstract: By mounting a projection lens to a first supporting member for fixing spatial light modulators, polarization beam splitters and a cross dichroic prism, and providing a second supporting member having a thermal expansion coefficient larger than that of the first supporting member between the projection lens and the first supporting member, a fluctuation of distance between the spatial light modulators and the projection lens due to heat generated by a light source lamp of a projection type display apparatus and temperature change in use environment can be canceled so that an optimum projected image having nothing to do with being out of focus can always be obtained.

Abstract: A magnetic recording and reproducing apparatus includes a tape guide drum (10) composed of a lower stationary drum (10A) supported integrally with a drum shaft (18) and an upper rotary drum (10B), a lead member (12) provided separately from the lower drum and composed of an annular portion (52) having a portion for guiding a reference edge Te of a magnetic tape T and a bottom portion (53). The apparatus further includes pivot means provided inside the drum to support and allow the center axis of the drum to tilt with respect to the annular portion of the tape guide.