This disclosure describes a system configured to present primary and secondary, tertiary, etc., virtual reality content to a user. Primary virtual reality content may be displayed to a user, and, responsive to the user turning his view away from the primary virtual reality content, a sensory cue is provided to the user that indicates to the user that his view is no longer directed toward the primary virtual reality content, and secondary, tertiary, etc., virtual reality content may be displayed to the user. Primary virtual reality content may resume when the user returns his view to the primary virtual reality content. Primary virtual reality content may be adjusted based on a user's interaction with the secondary, tertiary, etc., virtual reality content. Secondary, tertiary, etc., virtual reality content may be adjusted based on a user's progression through the primary virtual reality content, or interaction with the primary virtual reality content.

An image projection device incudes a scanning unit that two-dimensionally scans a light beam emitted from a light source, a light guide member that is formed of a glass material through which light beams emitted from the scanning unit at different times pass, has reflection surfaces reflecting the light beams, converges the light beams reflected by the reflection surfaces at a first convergence point in the eye of the user, and then irradiates a retina of the user with the converged light beams, a first optical member that converges the light beams emitted from the scanning unit at a second convergence point before the light guide member and then causes the light beams to enter the light guide member, and a second optical member that is disposed at the second convergence point and causes the light beams to enter a last reflection surface as diffusion lights.

Methods and devices for processing images are disclosed. In various embodiments, an electronic device for processing images may include: a display module to display a first image and a control module to control a process of receiving a second image different from the first image. The control module may be capable of altering the second image in accordance with a block area arranged on the first image, determining an output sequence for the first image and the altered second image, and alternatingly displaying the first image and the altered second image according to the output sequence.

Methods, systems, and computer programs are presented for the presentation of images in a head-mounted display (HMD). One HMD includes a screen, a processor, inertial sensors, a motion tracker module, and a display adjuster module. The motion tracker tracks motion of the HMD based on inertial data from the inertial sensors, and the display adjuster produces modified display data for an image frame to be scanned to the screen if the motion of the HMD is greater than a threshold amount of motion. The display data includes pixel values to be scanned to rows in sequential order, and the modified display data includes adjusted pixel values for pixels in a current pixel row of the image frame to compensate for the distance traveled by the HMD during a time elapsed between scanning a first pixel row of the image frame and scanning the current pixel row of the image frame.

A display system comprises a projector combined with a retro reflective screen and a viewer distance from the projector such that the observation angle is less than approximately 2-3 degrees. The brightness of the image on the screen for the proposed display system is increased by a factor of ˜100-500× as compared to traditional display systems with for an equivalent power/intensity light source.

This disclosure describes a system configured to present primary and secondary, tertiary, etc., virtual reality content to a user. Primary virtual reality content may be displayed to a user, and, responsive to the user turning his view away from the primary virtual reality content, a sensory cue is provided to the user that indicates to the user that his view is no longer directed toward the primary virtual reality content, and secondary, tertiary, etc., virtual reality content may be displayed to the user. Primary virtual reality content may resume when the user returns his view to the primary virtual reality content. Primary virtual reality content may be adjusted based on a user's interaction with the secondary, tertiary, etc., virtual reality content. Secondary, tertiary, etc., virtual reality content may be adjusted based on a user's progression through the primary virtual reality content, or interaction with the primary virtual reality content.

In the present specification, an image processing device and an image processing method for same are disclosed. An image processing device for processing images according to an embodiment of the present invention comprises: a receiving unit for receiving content; a controller for turning retinal scanning on and measuring an accommodation, and calculating a focal depth based on the measured accommodation and controlling in order to generate an image according to the calculated focal depth; and an output unit for outputting the generated image.

This disclosure describes a system configured to present primary and secondary, tertiary, etc., virtual reality content to a user. Primary virtual reality content may be displayed to a user, and, responsive to the user turning his view away from the primary virtual reality content, a sensory cue is provided to the user that indicates to the user that his view is no longer directed toward the primary virtual reality content, and secondary, tertiary, etc., virtual reality content may be displayed to the user. Primary virtual reality content may resume when the user returns his view to the primary virtual reality content. Primary virtual reality content may be adjusted based on a user's interaction with the secondary, tertiary, etc., virtual reality content. Secondary, tertiary, etc., virtual reality content may be adjusted based on a user's progression through the primary virtual reality content, or interaction with the primary virtual reality content.

This disclosure describes a system configured to present primary and secondary, tertiary, etc., virtual reality content to a user. Primary virtual reality content may be displayed to a user, and, responsive to the user turning his view away from the primary virtual reality content, a sensory cue is provided to the user that indicates to the user that his view is no longer directed toward the primary virtual reality content, and secondary, tertiary, etc., virtual reality content may be displayed to the user. Primary virtual reality content may resume when the user returns his view to the primary virtual reality content. Primary virtual reality content may be adjusted based on a user's interaction with the secondary, tertiary, etc., virtual reality content. Secondary, tertiary, etc., virtual reality content may be adjusted based on a user's progression through the primary virtual reality content, or interaction with the primary virtual reality content.

A head-mounted display includes a wearing portion, a display body, a first strap, a second strap, an adjustment assembly, and a switching assembly. The display body is connected to the wearing portion. The first strap and the second strap are respectively connected to two opposite sides of the wearing portion. The first strap, the second strap, and the wearing portion define a wearing space, and the first portion of the first strap and the second portion of the second strap are overlapped with each other. The adjustment assembly is adapted to be coupled to the first strap and the second strap and is configured to adjust the degree of overlap of the first portion and the second portion to thereby change the wearing space. The switching assembly is disposed at the adjustment assembly to switch the adjustment assembly to a coupled state or a decoupled state.