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Head-mounted display and method for designing wide-focus lens used in same

A focus lens, display technology, applied in lenses, instruments, magnifiers, etc., can solve the problems of increased weight and increased cost

Active Publication Date: 2020-06-23
NAT UNIV CORP TOKYO UNIV OF AGRI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the utilization of a mechanical mechanism including a focal length variable lens and a motor, the resulting increase in cost, and an increase in weight become problems

Method used

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  • Head-mounted display and method for designing wide-focus lens used in same
  • Head-mounted display and method for designing wide-focus lens used in same
  • Head-mounted display and method for designing wide-focus lens used in same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0115] Wide-focus lenses (Examples 1 to 4) assumed to be attached to a VR HMD were produced, and "visibility" and "eye fatigue" when observing a stereoscopic display were evaluated.

[0116] Data common to the wide focus lenses of Examples 1 to 4 are as follows.

[0117] Refractive index 1.608

[0118] Front Surface Base Curve 4.12

[0119] degree 0.00D

[0120] Center thickness 1.80mm

[0121] In addition, the value of the constant of the aspheric surface component added to each lens is as shown in Table 1 below.

[0122] [Table 1]

[0123]

[0124] There were 4 subjects (30 to 55 years old), two of whom were glasses wearers. Wearing the stereoscopic glasses (refer to Figure 5A ) watched commercially available stereoscopic video contents (stereoscopic movies). The distance between the display surface of the monitor and the eyes of the test subject was set at 90 cm to 120 cm. After watching for a predetermined time, the "visibility" and "eye fatigue" of the wide-fo...

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Abstract

Provided is a head-mounted display that enables viewing of a stereoscopic image without visual fatigue caused by vergence-accommodation conflict. A head-mounted display 1 includes a display device 3 to display images 3a and 3b for the left eye and the right eye on a screen 3c, virtual image forming optical systems 4a and 4b for the left eye and the right eye, respectively disposed with respect toimages for the left eye and the right eye on the screen, and wide-focus lenses 5a and 5b for the left eye and the right eye having a negative focal length with a range, and respectively disposed withrespect to the virtual image forming optical systems for the left eye and the right eye so as to overlap optical axis directions of the virtual image forming optical systems for the left eye and the right eye. By respectively displaying virtual images of images for the left eye and the right eye formed by the virtual image forming optical systems for the left eye and the right eye in a range witha width extending at a near side by the wide-focus lenses for the left eye and the right eye, a permissible range of vergence and accommodation is expanded to the near side, and in the expanded regionat the near side, a stereoscopic image can be viewed without visual fatigue caused by vergence-accommodation conflict.

Description

technical field [0001] The invention relates to a head-mounted display and a design method of a wide-focus lens used in the head-mounted display. Background technique [0002] In recent years, the research and development of virtual reality (VR) technology and augmented reality (AR) technology is expected to be utilized in a wide range of fields from professional fields such as medical care and design to general consumer fields such as games and entertainment. In VR technology and AR technology, a head-mounted display (HMD) is used (for example, refer to Patent Document 1), which is a display device worn on the head. to present a stereoscopic image to the user. In addition, the stereoscopic display method in which parallax images corresponding to the left and right eyes are displayed in this way is called binocular stereoscopic display. In the HMD, by displaying a wide-angle stereoscopic image with a particularly large viewing angle, it is possible to give a user a high se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/01G02B27/00G02B13/16G02B17/08G02B25/00G02B30/22G03B35/20H04N13/339H04N13/344H04N13/346
CPCG02B27/0172G02B2027/0174G02B27/0075G02B3/02G02B25/001G02B27/0012G02B2003/0093G02B2027/0132G02C7/022G02C11/10G02C2202/24
Inventor 高木康博宫岛泰史
Owner NAT UNIV CORP TOKYO UNIV OF AGRI & TECH
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