JPH09127458A - On-head display with eyeball image measuring function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sight impediment due to deterioration, etc., in resolution of an on-head display by measuring an eyeball image while displaying a video and analyzing the eyeball image (number of blinks, size of pupil, etc.). SOLUTION: CRT displays 1R, 1L housed in a head casing display an inputted video signal. At this time, the latent image positions of the video are made so as to place farther than the real positions of the CRT displays 1R, 1L by optical systems 2R, 2L consisting of lenses. The video transmitting through the optical systems 2R, 2L are reflected by mirrors 3R, 3L and half mirrors 4R, 4L to arrive at the eyeballs. LEDs 5R, 5L light emitting an infrared ray unrecognizable by the sight of the human are arranged in the vicinity of the eyeballs, and when the eyeballs are irradiated by the infrared ray LEDs 5R, 5L, the reflected light transmit through the half mirrors 4R, 4L, and generate infrared ray images by CCD cameras 7R, 7L capable of light receiving the infrared ray after reflected by infrared ray mirrors 6R, 6L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-mounted display capable of measuring an eyeball image during image display.

[0002]

2. Description of the Related Art Conventionally, a small head-mounted display has been one-sided for displaying images. Where,
There has been concern about the problem of visual impairment caused by long-term use and poor image quality.

[0003]

In the prior art, the resolution of a small display used for a head-mounted display cannot be said to be sufficient, and it is possible to prevent poor image quality and visual impairment due to long-term use. There was a need.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a head-mounted display which prevents visual acuity by measuring an eyeball image during video display. To provide.

[0005]

In order to solve the above problems, the present invention provides a head-mounted compact display capable of displaying separate images for the left and right eyes, which is small in size and capable of displaying images. A display block, an optical system block for appropriately visualizing the small display housed in the head housing, and an eyeball for measuring eyeball images of the left and right eyes during or without image display. It is characterized by having an infrared light emitting block which illuminates and a camera block which receives infrared reflection by an eyeball.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to FIG. The CRT displays 1R and 1L to which the video signal is input display the video. Since the CRT displays 1R and 1L are housed in the head case, the distance between the CRT displays 1R and 1L is too close to the eyes and the image cannot be viewed properly. Therefore, the optical system 2R, 2 including a lens
L is used to bring the virtual image position of the image farther than the actual positions of the CRT displays 1R and 1L. The image transmitted through the optical systems 2R and 2L is reflected by the mirrors 3R and 3L and the half mirrors 4R and 4L and reaches the eyeball. LEDs 5R and 5L that emit infrared rays that cannot be recognized by human eyesight are arranged near the eyes. Infrared LE
D5R and D5L are composed of a plurality of elements in order to improve reliability. When the infrared LEDs 5R and 5L illuminate the eyeball, the reflected light passes through the half mirrors 4R and 4L,
After being reflected by the infrared mirrors 6R and 6L, the infrared images are generated by the CCD cameras 7R and 7L capable of receiving infrared rays.

With the above arrangement, it is possible to measure an eyeball image while displaying an image, and by analyzing the eyeball image (the number of blinks, the size of the pupil, etc.), the head-mounted type Small display of the display It is possible to prevent and diagnose the visual acuity caused by the low resolution of the display and long-term use.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a head mounted display with an eyeball image measuring function of the present invention. In the figure, 1
R and 1L are CRT displays, 2R and 2L are optical systems,
3R and 3L are mirrors, 4R and 4L are half mirrors, 5
R and 5L are infrared LEDs, 6R and 6L are infrared mirrors,
7R and 7L are CCD cameras, and 8 is a shield plate. Here, the suffix R indicates the right eye and L indicates the left eye. Since the right eye and the left eye are configured symmetrically,
Explaining for the right eye, the CRT display R1
The video signal is input from the video generation unit for the right eye to display the video for the right eye. The optical system 2R is composed of a lens for bringing the virtual image position of the image display to a far point from the actual position, which has the effect of reducing the overall size of the display. The mirror 3R totally reflects the image light, and by changing the direction in which the image is displayed together with the half mirror 4R, the optical path of the image light is bent and the total length of the display is shortened. Next, infrared L
The ED5R is a light emitting diode whose emission frequency band is an infrared region that does not overlap the visible region, which is the frequency band of the light of the image displayed on the display, and which illuminates the eyeball to capture an image of the eyeball. Infrared rays for illuminating the eyeball are invisible to the eye and do not affect the image light. The infrared light reflected by the eyeball passes through the half mirror 4R, is reflected by the infrared mirror 6R, and is photographed by the CCD camera 7R. The shield plate 8 is a member that allows the scenery of the outside world to be blocked. Although the above description relates to the configuration for the right eye,
It goes without saying that the same applies to the left eye.

According to the above construction, the eyeball image can be measured while the image is displayed on the small display, and by analyzing the eyeball image, it is caused by the low resolution of the head-mounted display and long-term use. It is possible to prevent the visual impairment that occurs.

Although the CRT display is used in the image display unit according to the configuration of FIG. 1, a liquid crystal display may be used.

[0011]

According to the present invention, the visual acuity that may be caused by the conventional head-mounted display can be prevented by performing the eyeball image measurement at the same time as the image display, and the diagnosis can be performed. There is an effect.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a head mounted display according to the present invention.

[Explanation of symbols]

 1R, 1L CRT display 2R, 2L Optical system 3R, 3L Mirror 4R, 4L Half mirror 5R, 5L Infrared LED 6R, 6L Infrared mirror 7R, 7L CCD camera 8 Shield plate

Claims (1)

[Claims] 1. A head-mounted compact display capable of displaying separate images for the left and right eyes, wherein the compact display block capable of displaying images and the compact display housed in the head housing are suitable. The optical system block for visualizing, the infrared light emitting block that illuminates the eyeballs to measure the eyeball images of the left and right eyes while the image is being displayed or not, and the camera block that receives the infrared ray reflection by the eyeballs. A head-mounted display with an eyeball image measuring function, which has: