An example of an image display system includes a goggles apparatus and is capable of setting an angle of view of a virtual camera disposed in a virtual space to a first angle of view or a second angle of view smaller than the first angle of view. If the angle of view of the virtual camera is set to the first angle of view, the image display system sets a parallax between an image for a left eye and an image for a right eye to a first parallax. If the angle of view of the virtual camera is set to the second angle of view, the image display system sets the parallax between the image for a left eye and the image for a right eye to a second parallax smaller than the first parallax.

A light guide plate according to one or more embodiments may include a first optical deflector that guides light to be emitted within a first angle range to display a stereoscopic image in a space, and a second optical deflector that guides light to be emitted within a second angle range to display a stereoscopic image at a same position as the stereoscopic image. Across a boundary between the first angle range and the second angle range, a discrete change occurs between luminance of a portion of the stereoscopic image and luminance of a portion of the stereoscopic image corresponding to the portion of the stereoscopic image.

A light guide plate according to one or more embodiments may include a first optical deflector that guides light to be emitted within a first angle range to display a stereoscopic image in a space, and a second optical deflector that guides light to be emitted within a second angle range to display a stereoscopic image at a same position as the stereoscopic image. Across a boundary between the first angle range and the second angle range, a discrete change occurs between luminance of a portion of the stereoscopic image and luminance of a portion of the stereoscopic image corresponding to the portion of the stereoscopic image.

An image projection apparatus includes a projection light emission unit, a first optical element, a second optical element, and an optical system. The projection light emission unit has a display surface with a first region and a second region arranged in an x direction. The first optical element reflects first projection light from the first region. The second optical element reflects the first projection light reflected by the first optical element and transmits second projection light from the second region. The optical system projects the first and the second projection light. The first direction corresponds to a direction in which both eyes are aligned when the first projection light and the second projection light are projected into the user's field of view. The display surface includes subpixels constituting one pixel arranged in the first direction and subpixels constituting different pixels in a second direction that intersects the first direction.

An image projection apparatus includes a projection light emission unit, a first optical element, a second optical element, and an optical system. The projection light emission unit has a display surface with a first region and a second region arranged in an x direction. The first optical element reflects first projection light from the first region. The second optical element reflects the first projection light reflected by the first optical element and transmits second projection light from the second region. The optical system projects the first and the second projection light. The first direction corresponds to a direction in which both eyes are aligned when the first projection light and the second projection light are projected into the user's field of view. The display surface includes subpixels constituting one pixel arranged in the first direction and subpixels constituting different pixels in a second direction that intersects the first direction.

A three-dimensional display method is provided and comprises: acquiring target space coordinates of a target marker in a physical space; converting the target space coordinates into rendering coordinates in a virtual space; acquiring data of a virtual object to be displayed, and rendering, based on the data of the virtual object and the rendering coordinates, the virtual object to obtain a left-eye display content and a right-eye display content of the virtual object; and displaying the left-eye display content and the right-eye display content. The left-eye display content is projected onto a first optical lens, the right-eye display content is projected onto a second optical lens, and the first optical lens and the second optical lens respectively reflect the left-eye display content and the right-eye display content to human eyes. The method can achieve alignment display of the virtual object with the target marker, and a stereoscopic display.

A three-dimensional display method is provided and comprises: acquiring target space coordinates of a target marker in a physical space; converting the target space coordinates into rendering coordinates in a virtual space; acquiring data of a virtual object to be displayed, and rendering, based on the data of the virtual object and the rendering coordinates, the virtual object to obtain a left-eye display content and a right-eye display content of the virtual object; and displaying the left-eye display content and the right-eye display content. The left-eye display content is projected onto a first optical lens, the right-eye display content is projected onto a second optical lens, and the first optical lens and the second optical lens respectively reflect the left-eye display content and the right-eye display content to human eyes. The method can achieve alignment display of the virtual object with the target marker, and a stereoscopic display.

An example of an image display system includes a goggles apparatus and is capable of setting an angle of view of a virtual camera disposed in a virtual space to a first angle of view or a second angle of view smaller than the first angle of view. If the angle of view of the virtual camera is set to the first angle of view, the image display system sets a parallax between an image for a left eye and an image for a right eye to a first parallax. If the angle of view of the virtual camera is set to the second angle of view, the image display system sets the parallax between the image for a left eye and the image for a right eye to a second parallax smaller than the first parallax.

An example of an image display system includes a goggles apparatus and is capable of setting an angle of view of a virtual camera disposed in a virtual space to a first angle of view or a second angle of view smaller than the first angle of view. If the angle of view of the virtual camera is set to the first angle of view, the image display system sets a parallax between an image for a left eye and an image for a right eye to a first parallax. If the angle of view of the virtual camera is set to the second angle of view, the image display system sets the parallax between the image for a left eye and the image for a right eye to a second parallax smaller than the first parallax.

In this patent, an advanced head display unit designed primarily for fire fighters is disclosed. The advanced augmented reality/virtual reality (AR/VR) head display unit improves coordination between teammates through eye tracking coupled with augmented reality features. This allows one fire fighter to know where another fire fighter is looking and helps coordinate tasks by dividing the scene into sectors and visibly marking each sector. Further, this system helps determine where to hose with a smart target system. Further, multiple sensors are utilized together to triangulate the location of a victim's voice. Additional advantages are also disclosed above.