Abstract: A projector includes an optical path change device placed between a light modulation device and a projection optical device. The optical path change device has an optical member holding part that holds an optical member that a light modulated by the light modulation device enters, and a supporting member that swingably supports the optical member holding part. The supporting member is supported by a holding member that holds the light modulation device or the projection optical device.

Abstract: A projector according to the disclosure includes a projection system projecting image light onto a target projection surface, and a shutter unit that is arranged at a light incident side of the projection system and that can block an optical path. The shutter unit has a drive motor, a transmission member transmitting a rotational drive force of the drive motor, and a shutter member arranged on the optical path and moving, linked to a movement of the transmission member. The shutter member is provided facing a facing area facing the projection system. At least a part of the transmission member is provided facing the facing area. The drive motor is provided outside the facing area.

Abstract: A dustproof apparatus according to an embodiment of the present technology includes a base portion and a cover portion. The base portion includes a connection portion to be connected to an external attachment portion and a holding portion that holds an image display apparatus. The cover portion includes an inlet, a filter portion provided at the inlet, and an outlet that discharges air sucked in from the inlet, the cover portion being attached to the base portion such that the cover portion covers the image display apparatus held by the holding portion.

Abstract: A projection optical system capable of performing magnification projection of an image displayed on an image display surface, with a 40° half angle of view, or more includes, in an order from a magnification side: a first optical system; and a second optical system, wherein the second optical system forms an intermediate image of the image, the first optical system performs magnification projection of the intermediate image, and the following conditional expressions (1) and (2) are satisfied: 1<Ff/|Fw|<2 . . . (1), 0.4<Lf/Lw<0.6 . . . (2), where, Ff: a focal length of the first optical system, Fw: a focal length of an entire system, Lf: a distance on optical axis, from a most-magnification-side surface vertex to the intermediate image, in the first optical system, Lw: an entire length of a lens.

Abstract: A self-damping shutter apparatus for use in an exposure system of a photolithography machine, comprising: at least two pieces of shutter blades (1) for cutting off light source to an exposure area when the shutter is closed; a shutter driving arm (2), for driving the shutter blades (1) to synchronically open or close; a magnetic damping brake motor (3), for driving or braking the shutter driving arm (2), and the magnetic damping brake motor (3) drives and brakes, via the shutter driving arm (2), the shutter blades (1). The self-damping shutter apparatus for use in the exposure system of the photolithography machine increases consistency of opening or closing the shutter blades, improves a light shading effect of the shutter apparatus in an exposure, and improves stability in the process of opening or closuring the shutter blades.

Abstract: Embodiments for prohibiting facial exposure to projected light from a projector device by a processor. A location of a facial region of a user may be determined in relation to the projected light emitted from a light source of a projector that displays an image. A portion of the projected light may be inhibited from exposing a selected blackout region of the facial region.

Abstract: A communication light detection adapter includes an adapter main body in which a light extraction hole is formed, a sliding lid attached to the adapter main body so as to slide between a closed position to close the light extraction hole and an open position to open the light extraction hole, and an energizing member to apply a pressure to the sliding lid in a direction from the open position toward the closed position.

Abstract: A projector modulates light emitted from a light source and projects the light, the projector including an image acquiring unit, a modulating unit, a light adjusting mechanism, and a light adjusting control unit. The image acquiring unit acquires an image from an image source. The modulating unit modulates the light emitted from the light sources, based on the image acquired by the image acquiring unit. The light adjustment mechanism reduces an amount of light incident on the modulating unit from the light source. The light adjustment control unit performs light adjustment control by the light adjustment mechanism, based on the image acquired by the image acquiring unit. The light adjustment control unit performs control to increase the amount of light incident of the modulating unit when the light adjustment mechanism maintains a predetermined light-adjusted state.

Abstract: A projector which modulates light emitted from a light source and projects the light, the projector including: an image acquiring unit for acquiring an image from an image source; a modulating unit for modulating the light emitted from the light sources, based on the image acquired by the image acquiring unit; a light adjustment mechanism for reducing an amount of light incident on the modulating unit from the light source; and a light adjustment control unit for performing light adjustment control by the light adjustment mechanism, based on the image acquired by the image acquiring unit; wherein the light adjustment control unit stops execution of the light adjustment control when at least one of an operating state of the projector and a state of the image acquired by the image acquiring unit meets a predetermined condition.

Abstract: The present invention includes light valve section (10) having a plurality of shutter mechanisms (14) that switch between a transmitting state and a shading state of light emitted from light emitting element (25); and substrate (16) through which light that exits plurality of shutter mechanisms (14) is transmitted. The display element also has plasmon coupling section (11) that causes plasmon coupling to occur with light that exits the light valve section (10). Plasmon coupling section (11) includes carrier generation layer (17) that generates carriers with incident light that exits light valve section (10), plasmon excitation layer (19) that has a higher plasma frequency than the frequency of light that is generated in carrier generation layer (17) excited with the light emitted from light emitting element (25), and wave number vector conversion layer (22) that converts the light or surface plasmons generated in plasmon excitation layer (19) into light having a predetermined exit angle.

Abstract: A projector includes: a projection optical device; an exterior housing; a shutter; and a support member, the shutter and support member are provided with an engagement structure including an engagement protrusion which being provided on either one of them, protrudes along a vertical axis, and an engagement groove which being provided on the other, and extending in a direction in which the shutter moves, guides a movement of the engagement protrusion by the engagement protrusion being inserted therein, and the engagement groove is provided in such a way that a start end at which the engagement protrusion is positioned in the closed position is positioned to the projection optical device projection side of a finish end at which the engagement protrusion is positioned in the open position.

Abstract: A projector includes an armor housing including an opening section through which an image is transmitted and a shutter device configured to open and close the opening section. The shutter device includes a blade member, a moving section configured to move the blade member, and movement regulating sections configured to regulate the movement of the blade member. The blade member includes first blades and second blades arranged to overlap each other and configured to move in the same direction each other to close and open the opening section. The second blades are moved in the same direction as the first blades by frictional resistance with the first blades. The movement regulating sections include second-blade regulating sections configured to come into contact with the second blades moved in the closing direction to predetermined positions and regulate further movement of the second blades in the closing direction.

Abstract: A projection zoom lens substantially consists of a negative first lens group and a positive second lens group, in this order from the magnification side. The first lens group substantially consists of a first lens which is a negative meniscus lens with a convex surface toward the magnification side. The second lens group substantially consists of a positive second lens, a third lens which is a positive meniscus lens with a convex surface toward the magnification side, a negative fourth lens, and a positive fifth lens, in this order from the magnification side. The first lens group and the second lens group move along the direction of the optical axis while changing magnification. At least one of the positive lenses within the entire system has an Abbe number and a refractive index within a predetermined range. The refractive indices of the first to third lenses satisfy a predetermined conditional expression.

Abstract: Some embodiments provide for a modular video projector system having a light engine module and an optical engine module. The light engine module can provide narrow-band laser light to the optical engine module which modulates the laser light according to video signals received from a video processing engine. Some embodiments provide for an optical engine module having a sub-pixel generator configured to display video or images at a resolution of at least four times greater than a resolution of modulating elements within the optical engine module. Systems and methods for reducing speckle are presented in conjunction with the modular video projector system.

Abstract: A light modulation device side lens group has different power in the longitudinal and lateral directions and different magnifications in the longitudinal and lateral directions. Therefore, it is possible to make the aspect ratio of an image of the liquid crystal panel different from the aspect ratio of an image projected on a screen. That is, conversion can be performed on an aspect ratio which is a ratio of width to height using the optical projection system. At this time, a distance p and a distance p? between a diaphragm and the screen SC side end surface of the light modulation device side lens group satisfies predetermined conditional expressions, so it is possible to achieve a predetermined or higher telecentricity in both states, that is, a first operating state and a second operating state.

Abstract: A method and apparatus for increasing the effective contrast ratio and brightness yields for digital light valve image projectors using a variable luminance control mechanism (VLCM), associated with the projector optics, for modifying the light output and provide a correction thereto; and an adaptive luminance control module (ALCM) for receiving signals from the video input board, the adaptive luminance control module producing a signal on a VLCM bus connecting the variable luminance control mechanism and the adaptive luminance control module, the signal causing the variable luminance control mechanism to change the luminance of the light output and provide a corrected video signal for the projector.

Abstract: A dual switchable LCD display is disclosed that allows the juxtaposition of a front and rear image. A rear switchable screen is in proximity to the projector system. The rear image is projected on the rear screen at a first time interval. The rear switchable screen has an open state allowing light transmission through the rear screen and a closed translucent state obscuring the rear screen. A front switchable screen overlays the rear switchable screen. The projector system projects the front image on the front screen at a second time interval. The front switchable screen has an open state allowing light transmission through the front screen and a closed translucent state obscuring the front screen. A controller periodically cycles the respective closed and open states between the first and second time intervals to present a juxtaposition of the front image and the rear image to a viewer.

Abstract: The lens shifting device includes: first plate through which video light passes; second plate connected to first plate via elastic member and having projection lens attached to a position into which the video light that passed through first plate enters; slider disposed to project from second plate and housed in first plate to be movable in a predetermined direction; and guide shaft attached to first plate in the state of being engaged with slider and rotated to move the second plate. Elastic member is disposed between first plate and second plate to connect first plate and second plate in the state of generating an elastic contraction force.

Abstract: A display apparatus includes a variable aperture stop device, a control circuit and a user interface. The variable aperture stop device is operable to adjust the lens opening size by opening and closing an aperture. The control circuit is operable to control the opening and closing of the aperture based on an aperture ratio for the brightness distribution of an input signal constituting a screen. The user interface permits to set times necessary for the opening and closing of the aperture. The control circuit controls the opening and closing of the aperture based on times set via the user interface so that the response to the opening and closing of the aperture differs between when the signal changes from dark to light levels and when the level changes from light to dark levels.

Abstract: In at least one embodiment of the disclosure, a projector includes a light shield unit that shields a portion of a light emitted from a light source. The light shield unit is driven by a drive mechanism and rotates around a predetermined rotation axis to change a size of a light shield area. The light shield unit includes a leading edge having a contour defined by a plurality of first edges and a second edge disposed between the first edges. The second edge configured so as to be shifted toward the light source and away from the first edges during rotation of the light shield unit.

Abstract: A projection apparatus includes a shutter mechanism to prevent light from reaching an image plane during calibration of light sources. The shutter mechanism may include liquid crystal material that exhibits an effective index of refraction that varies with applied voltage. During calibration, a light beam is shuttered, light sources are driven by calibration data, and optical power is measured.

Abstract: According to the present invention, a projection type image display apparatus enables control of a large amount of light masking through a light-masking unit while maintaining a uniform illumination distribution in an area to be illuminated by the illumination light. The apparatus uses two array lenses on which lens cells are arranged in matrix form, where light-masking unit masks the array lens installed on the light source side in their particular area. The light-masking unit adjusts the amount of light emitted from the light source. The light-masking area of lens cells adjacent to lens cells closest to an optical axis is made smaller than the light-masking area of other cells.

Abstract: A projection display device has an illumination optical system that includes a light-intensity equalization element, a first optical system, and an aperture regulation member. The aperture regulation member is disposed at a position that is not optically conjugate with the screen, and the aperture regulation member has at least one of the following, using measured or calculated relative illuminances at each of multiple segments of the image formation region or screen: an aperture expansion part provided at a position corresponding to a segment with a low relative illuminance, the aperture expansion part being a cutout that narrows the light-blocking section and widens the aperture section; an aperture contraction part provided at a position corresponding to a segment with a high relative illuminance, the aperture contraction part being a protrusion that widens the light-blocking section and narrows the aperture section.

Abstract: The present invention discloses a projecting apparatus. The apparatus includes light emitting diodes, a light guide plate and a projecting component. The light guide plate is mounted between the light emitting diodes and the projecting component. A switching control valve is mounted between the light guide plate and the projecting component. The switching control valve is switched between an on position and an off position between the light guide plate and the projecting component. In the on position, the switching control valve guides lights of the light guide plate to the projecting component as a light source of the projecting component; in the off position, the switching control valve cuts off the lights guided from the light guide plate to the projecting component to further cut off the light source of the light guide plate. The present invention further discloses a projecting equipment.

Abstract: There is provided a projection image display apparatus which is excellent in quality of a display screen image even if a projection lens using a plastic lens having an asymmetrical shape with respect to an optical axis is used. The apparatus includes a projection lens which obliquely projects video light on a screen, an integrator which aligns a polarization direction of light from a light source, and an image display element (P, PL) which modulates light having the aligned polarization direction by an image signal. The projection lens includes multiple plastic lenses, and each of the multiple plastic lenses is arrayed, respectively, by shifting a gate direction to each other by 180 degrees. When the projection lens includes n sheets (n is a natural number) of plastic lenses, each of the multiple plastic lenses may be arrayed, respectively, by shifting a gate direction to each other by (360/n) degrees.

Abstract: A video display device includes a light guide unit for guiding outgoing light from a light source unit to a pixel area of a display device. The light guide unit includes a rod integrator having an input opening through which the outgoing light from the light source unit enters and an output opening provided on a side opposite to the input opening, and a light shielding plate provided between the input opening of the rod integrator and the light source unit. The light shielding plate has a plurality of types of openings for passing the outgoing light from the light source unit to the rod integrator. The light shielding plate is arranged in a state where one of the plurality of types of openings, which has a shape similar to that of the input opening of the rod integrator which is actually mounted, is aligned with the input opening.

Abstract: A reflective liquid crystal projector according to the aspect of the invention includes a light source, a reflective liquid crystal panel, and a wire grid polarization beam splitter element. The wire grid polarization beam splitter element is provided with a polarization beam split surface that reflects a first polarized light component and transmits a second polarized light component. The reflective liquid crystal projector also includes a projection optical system that projects the first polarized light component, and an aperture stop that is disposed on an optical path of the light beam emitted from the light source. The aperture stop limits the amount of first light more than that of second light. The first light is divergent from the reflective liquid crystal panel to the polarization beam split surface. The second light is divergent from the reflective liquid crystal panel to the polarization beam split surface.

Abstract: The invention provides a projection display that achieves continuous light amount control with ease and without causing unevenness of illumination of light applied to a light valve responsive to a video signal, thereby allowing constant image display with satisfactory contrast. The projection display of the invention includes a light valve (2); a light source (3a) generating light applied to the light valve (2); an integrator lens (4) provided on an optical path between the light source (3a) and the light valve (2) and making uniform the illumination distribution of light applied from the light source (3a) to the light valve (2); and a light amount control system (9) provided on the optical path and including a turning mechanism (9a) which turns like a set of double doors in order to adjust the amount of light applied from the light source (3a) to the light valve (2). The turning mechanism (9a) is bent into a V shape in a direction to reduce the amount of light (to block the light).

Abstract: A projector includes a light source device which emits an illumination light; an aperture disposed with a tilt with respect to a plane perpendicular to a center axis of the illumination light, provided with an opening section which transmits a part of the illumination light, and block a rest of the illumination light; a pair of first and second lens arrays which divides the illumination light from the light source device into a plurality of partial light; and an overlapping lens which overlaps the illumination light transmitted through the first and second lens arrays, wherein the aperture is disposed on a light path between the light source device and the overlapping lens.

Abstract: A projection apparatus includes a shutter mechanism to prevent light from reaching an image plane during calibration of light sources. The shutter mechanism may include liquid crystal material that exhibits an effective index of refraction that varies with applied voltage. During calibration, a light beam is shuttered, light sources are driven by calibration data, and optical power is measured.

Abstract: A control device that controls a video signal to be input to a display device and controls the luminance of a light source that causes light to be incident on the display device includes: a light source luminance control section that controls the luminance of the light source by means of a light source luminance control signal; a storage section that stores relationships between light source luminance control signals and video correction amounts; a video correction signal generating section that generates, on the basis of the video correction amount that is stored in the storage section and corresponds to the generated light source luminance control signal, a video correction signal that is used to correct the video signal; and a video signal correcting section that corrects the video signal by means of the video correction signal.

Abstract: An image projection apparatus 500 includes an optical modulation element 206R, 206G, 206B, a projection lens 100 configured to project light modulated by the optical modulation element onto a projection surface, an optical unit 201 configured to guide light from a light source 209 to the optical modulation element and to guide the light from the optical modulation element to the projection lens, a shutter mechanism 300 disposed between the optical unit and the projection lens and configured to operate so as to be in an open state and a closed state, and a focus corrector 501 configured to correct a focus variation generated by temperature changes of the optical unit and the projection lens by operating the projection lens based on a focus correction function. The focus corrector changes the focus correction function in accordance with information relating to an operation of the shutter mechanism.

Abstract: An automated adaptive optics and laser projection system is described. The automated adaptive optics and laser projection system includes an adaptive optics system and a compact laser projection system with related laser guidance programming used to correct atmospheric distortion induced on light received by a telescope. Control of the automated adaptive optics and laser projection system is designed in a modular manner in order to facilitate replication of the system to be used with a variety of different telescopes. Related methods are also described.

Abstract: A light control apparatus that controls the amount of light passing therethrough by blocking part of an incident light flux, includes: a pair of pivotal members having pivotal axes extending along a direction substantially perpendicular to a central axis of the light flux; and a pair of light blocking members held by the pair of pivotal members and changing the size of a light blocking area as the pair of pivotal members pivot, the light blocking area blocking part of the light flux, wherein the pivotal axes are located in positions that overlap with an area where the light flux passes, and the pair of light blocking members are located in positions that do not overlap with the pivotal axes.

Abstract: A projection lens provided is for projecting an image beam. The projection lens is disposed on a transmission path of the image beam and includes a first group of lenses and a second group of lenses. The first group of lenses includes a first spherical lens and a first aspheric lens. After the image beam passes through the first group of lenses, an intermediate image is formed between the first group of lenses and the second group of lenses, in which the first aspheric lens is the lens in the first group of lenses closest to the second group of lenses. A projection device using the projection lens is also provided. The projection device further includes a planar reflector on the transmission path of the image beam.

Abstract: The present invention is a method and apparatus for increasing the effective contrast ratio and brightness yields for digital light valve image projectors using a variable luminance control mechanism (VLCM), associated with the projector optics, for modifying the light output and provide a correction thereto; and an adaptive luminance control module (ALCM) for receiving signals from the video input board, the adaptive luminance control module producing a signal on a VLCM bus connecting the variable luminance control mechanism and the adaptive luminance control module, the signal causing the variable luminance control mechanism to change the luminance of the light output and provide a corrected video signal for the projector.

Abstract: When a rotation member is rotated clockwise by a stepping motor, one main operation member is rotated counterclockwise through a link member and the other main operation member is rotated clockwise by said main operation member through the link member. Also, one sub operation member is rotated counterclockwise by said main operation member through the link member, and the other sub operation member is rotated clockwise by the other main operation member through the link member. This causes the amount of overlap between a main split blade mounted to said main operation member and a sub split blade mounted to said sub operation member to be increased and also causes the amount of overlap between a main split blade mounted to the other main operation member and a sub split blade mounted to the other sub operation member to be also increased. As a result, the aperture opening formed between the two main split blades is increased.

Abstract: A projector that projects an image to a projection object using light emitted from a light source lamp, including a light adjustment sensor that measures the projection distance to the projection object and the intensity of reflected light from the projection object; a zoom position sensor that detects a zoom ratio; and a control section that adjusts the intensity of light emitted from the light source lamp based on the projection distance and the reflected light intensity measured by the adjustment sensor and the zoom ratio detected by the zoom position sensor so as to keep the luminance of a projection image displayed on the projection object constant.

Abstract: A projection system having a first tilting mirror matrix, a second tilting mirror matrix, and an imaging lens, which projects the first tilting mirror matrix onto the second tilting mirror matrix, wherein each tilting mirror matrix has multiple tilting mirrors, the tilting axes of which are positioned in a modulator surface plane. The imaging lens includes a first lens and an imaging mirror, and the imaging mirror forms an aperture stop of the imaging lens, wherein the aperture diaphragm includes an uneven angle of 90° together with the normal of the modulator surface of the first tilting mirror matrix without taking into account any optical path folds.

Abstract: A projector includes: an illuminator that emits an illumination light flux; a light control mechanism that blocks at least part of the illumination light from the illuminator; a light modulator illuminated with the illumination light from the illuminator; a projection system capable of projecting modulated light formed by the light modulator and switching the f number when the modulated light is projected; and a control unit that controls the open/close state of the light control mechanism in accordance with the f number of the projection system so that illumination light having an angular distribution corresponding to the f number of the projection system is incident on the projection system.

Abstract: A projector includes: a projection optical device; an exterior housing; a shutter; and a support member, the shutter and support member are provided with an engagement structure including an engagement protrusion which being provided on either one of them, protrudes along a vertical axis, and an engagement groove which being provided on the other, and extending in a direction in which the shutter moves, guides a movement of the engagement protrusion by the engagement protrusion being inserted therein, and the engagement groove is provided in such a way that a start end at which the engagement protrusion is positioned in the closed position is positioned to the projection optical device projection side of a finish end at which the engagement protrusion is positioned in the open position.

Abstract: A projector includes: first and second light blocking members adapted to partially block a light beam from a light source, and a drive section adapted to make the first and second light blocking members perform an opening and closing operation. When the corresponding first and second light blocking members are located at a maximum blocking state, with respect to an opening and closing direction of the first and second light blocking members perpendicular to a system optical axis, a first and second support sections support the first and second light blocking members at predetermined positions on the system optical axis side from intermediate positions corresponding to midpoints of areas between edge portions of the first and second light blocking members on the system optical axis side and parts, to which outer edges of the light beam to be blocked are input.

Abstract: The present invention provides a projection apparatus including a light source module, an illumination lens module, a light valve, and a projection lens. The light source module is configured to provide a first light beam, and the illumination lens module and the light valve are disposed on a first propagating path of the first light beam. The illumination lens module has a first optic axis. The light valve is configured to transfer the first light beam into a second light beam with an image, and the first light beam propagates through the illumination lens module to the light valve without reflection. The projection lens has a second optic axis substantially perpendicular to the first optic axis.

Abstract: A projector includes: an illuminating device including a light source device, a first lens array that comprises first regions located at four corners in the first lens array when viewed along a system optical axis and second regions located between the two first regions, and a second lens array; a light modulating device; a projection optical system; a light control device; and a mode selection device. The light control device blocks part of the plural partial light beams by causing first and second light shields to integrally operate, when the brightness priority mode is selected. The light control device always blocks part of the partial light beams with the first light shields and blocks part of the partial light beams by causing the second light shields to operate independently from the first light shields.

Abstract: An optical system is provided which includes an illumination system with a light source, a lens member which guides light from the light source, and a mirror member; an image unit on which an image is formed and on which light from the illumination system is incident; a projection system which magnifies and projects the image formed on the image unit; and a blocking unit which is mounted to the mirror member of the illumination system and partially blocks light from the light source that is directed to the mirror member.

Abstract: A projector includes: a projection optical device; an exterior housing; a shutter; and a support member, the shutter and support member are provided with an engagement structure including an engagement protrusion which being provided on either one of them, protrudes along a vertical axis, and an engagement groove which being provided on the other, and extending in a direction in which the shutter moves, guides a movement of the engagement protrusion by the engagement protrusion being inserted therein, and the engagement groove is provided in such a way that a start end at which the engagement protrusion is positioned in the closed position is positioned to the projection optical device projection side of a finish end at which the engagement protrusion is positioned in the open position.

Abstract: The present invention includes light valve section (10) having a plurality of shutter mechanisms (14) that switch between a transmitting state and a shading state of light emitted from light emitting element (25); and substrate (16) through which light that exits plurality of shutter mechanisms (14) is transmitted. The display element also has plasmon coupling section (11) that causes plasmon coupling to occur with light that exits the light valve section (10). Plasmon coupling section (11) includes carrier generation layer (17) that generates carriers with incident light that exits light valve section (10), plasmon excitation layer (19) that has a higher plasma frequency than the frequency of light that is generated in carrier generation layer (17) excited with the light emitted from light emitting element (25), and wave number vector conversion layer (22) that converts the light or surface plasmons generated in plasmon excitation layer (19) into light having a predetermined exit angle.

Abstract: A video projector for displaying a picture based on a video signal. The video projector includes a first LCD panel for red light, a second LCD panel for green light, and a third LCD panel for blue light. A light source emits light toward the first to third LCD panels. A modulated light computer determines a correction coefficient for reducing the amount of light emitted from the light source toward the first to third LCD panels when temperature load of at least one of the first to third LCD panels increases. An emitted light amount control unit corrects the video signal with the correction coefficient and controls the amount of light emitted from the light source toward the first to third LCD panels.

Abstract: The lighting unit includes the DMDs (80R), (80G), and (80B). The lighting unit also includes: the prisms (50) and (60) combining the light emitted from the DMDs (80R), (80G), and (80B); and the light modulating optical device (90G). The incident light including the green component light and the yellow component light enters the light modulating optical device (90G). The light modulating optical device (90G) transmits the green component light and changes a transmittance of the yellow component light depending on a change of a molecular state. Light having emitted from the light modulating optical device (90G) enters the DMD (80G), which corresponds to the incident light.

Abstract: A projector apparatus includes: a case; a light source which is provided in the case and emits light by supply of power; an opening provided in the case; an image projection unit that generates image projection light from light of the light source and emits the image projection light through the opening in order to project an image onto a screen; a shutter which is moved to a block position at which the opening provided in the case is blocked or to an open position at which the opening is opened; and a light leakage section which provides notification that the power is being supplied to the light source by allowing some light beams of the light source or some light beams of the image projection unit to leak to the outside of the case in a state where the shutter is located at the block position.