A projection apparatus executes a first processing and a second processing on image signal received from an external device, projects an image based on the image signal processed by an image processor, and switches an operation mode of the projection apparatus to a first mode, which is a low-latency mode for suppressing a delay in displaying an image, and a second mode, which is not the low-latency mode. The image processor maintains the first processing and stops the second processing in response that the operation mode of the projection apparatus is switched to the first mode from a state in which the operation mode is the second mode and the first processing and the second processing are executed.

A method for controlling a projector having a projection lens and a camera includes an acquisition step of acquiring a focal distance of the projection lens, a determination step of determining a size and an interval of dots configuring a projection pattern based on the focal distance, a projection step of projecting the projection pattern by the projection lens, and capturing step of capturing the projection pattern by the camera to generate a captured image.

A projection direction change device includes a mirror that reflects light emitted from a projection lens unit of a projector, a mirror support part that rotatably supports the mirror around a first axis and a second axis, a first drive part that rotary drives the mirror around the first axis, and a second drive part that rotary drives the mirror around the second axis. An intersecting point of the first and second axes is positioned closer to the projection lens unit than a geometric barycenter of the mirror is.

The purpose of the present technology is to provide a video projection device capable of obtaining a satisfactory video (image) while achieving reduction in power consumption and reduction in size of the device. Provided is a video projection device including at least: a monolithic semiconductor laser array including multiple light emitting units, each of which emits a laser light beam; an optical waveguide that guides the laser light beam in a predetermined direction; a mirror that scans the laser light beam in two axes; and a diffractive element that diffracts the laser light beam in a specific direction in front of an eye and projects the laser light beam on a retina. The multiple light emitting units are respectively optically coupled to different input ports among multiple input ports included in the optical waveguide.

An object of the present invention is to provide a projection apparatus capable of appropriately performing control relating to rotation of a projection lens. A projection apparatus according to a first aspect of the present invention includes a housing; a power supply; a control unit; and a projection lens attached to the housing, the projection lens having a holder, a detection unit that detects a rotation state of the holder, and a locking mechanism unit that brings rotation of the holder into a locked state or an unlocked state. The locking mechanism unit does not bring rotation of the holder into the locked state when a rotation state of the holder is other than a specific state. The specific state is a rotation state in which the locking mechanism unit is capable of bringing rotation of the holder into the locked state. When rotation of the holder is not brought into the locked state, the control unit disables an operation relating to the locked state or an operation of turning off the power supply.

A display control method includes displaying, by a projection device, a first user interface related to an adjustment of a projection image, displaying, by a control device communicating with the projection device, a second user interface including a display object corresponding to the projection image, transmitting, by the projection device, first adjustment information based on a first operation to the first user interface to the control device when the projection device accepts the first operation, adjusting, by the projection device, the projection image based on the first adjustment information, updating, by the control device, the display object based on the first adjustment information, transmitting, by the control device, second adjustment information based on a second operation to the second user interface to the projection device when the control device accepts the second operation, adjusting, by the projection device, the projection image based on the second adjustment information, and updating, by the projection device, the first user interface based on the second adjustment information.

The disclosure relates to a retinal display apparatus for generating an image on the retina of an eye of a user, wherein the retinal display apparatus is configured to generate multiple light beams, each light beam conveying an instance of the image, wherein the multiple light beams correspond one-to-one to multiple potential orientations of the eye of the user. Moreover, the disclosure relates to a corresponding method.

A projection system according to the present disclosure includes an image projection section projecting a first image light and a second image light to directions different from each other so that the first image light overlaps the second image light in a first region, and a fog screen production section producing a fog screen in which a plurality of particles that reflect the first image light and the second image light are dispersed in a screen region containing the first region.

An image display apparatus includes a display, an input unit configured to receive input data including an input image in which a first dynamic range is defined and including information relating to luminance of the input image, and at least one processor or circuit for executing tasks of converting the first dynamic range into a second dynamic range having a maximum luminance lower than that of the first dynamic range, acquiring a user set maximum luminance of the second dynamic range, acquiring a maximum display luminance when the display unit displays the maximum luminance of the second dynamic range under a display condition set for the display unit, and generating a setting screen for a user setting. The setting screen displays information indicating a relative relation among the information relating to luminance acquired from the data, the user set maximum luminance and the maximum display luminance.

A projection image including a test pattern is projected on a projection surface. The projection image is moved in a first direction. An image of the projection image is captured. A change in the test pattern contained in the projection image the image of which has been captured is detected. When a change in the test pattern is detected, it is determined that the projection image has reached an end of the projection surface.