JPH07146658A - Head mount display - Google Patents

Abstract

PURPOSE:To provide the mount display which enables viewing with both eyes, makes it possible to obtain full-color images, features high accuracy, decreases noise and vibration. CONSTITUTION:The light emitted from an LED array 2 is reflected by a rotating mirror 3, is further reflected by a mirror 5 or 6 according to its angle, is magnified by a lens 7 or 8 and is imaged respectively at both eyes. The image of the LED array lining up to a longitudinal straight line is made visible by spreading transversely to the eyes by an after-image effect when the LED array 2 is flickered at a high speed by using a controller according to the angle of the rotating mirror 3. The LED arrays 19, 20, 21 of three primary colors, red, green and blue are arranged at specified angle spacings with the rotating mirror 3 and the respective arrays are flickered by the controller according to the angle of the mirrors, by which the screen of full colors is obtd. Then, the head mount display which enables a user to view the images with both eyes and enables the user to view the full-color images utilizing the after-image effect by flickering the LED array 2 by means of the controller by using the rotating mirror 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head mount display used as a display device for a virtual reality or the like.

[0002]

2. Description of the Related Art In recent years, head-mounted displays, which are compact and have excellent portability, have attracted attention as next-generation displays. Among them, the one using the LED array is easier to obtain a high-pixel image than the one using the liquid crystal display device. This L
US Pat. No. 4,934,773 is a conventional head mount display using an ED. This method has already been put to practical use, and the method is shown in FIGS. 8 and 9.

In FIG. 8, 30 is a housing, 31 is an LED array in which LEDs are arranged in a vertical direction, 32 is a lens for enlarging the image of the LED array, 33 is a mirror, and a spring 34 is provided.
It is supported so that it can vibrate. Reference numeral 35 is an image of the LED array seen when the mirror is stopped, and 36 is an eye for observation. A magnet 34 is attached to the mirror 33,
By attracting and repelling this with the electromagnet 37, the mirror 33 vibrates. Reference numeral 38 represents an adsorption piece.

FIG. 9 is a view of this device as viewed from above. In FIG. 9, 39 is a mirror in a sucked position, 40 is a mirror in a neutral position, and 41 is a mirror in a repulsed position. At each position, the light from the LED array 31 is reflected as shown in the figure to form a laterally spread image 42. Because of the afterimage effect on the eye, the image that has spread laterally can be seen as a single screen.

[0005]

However, in the prior art as described above, the image cannot be seen with both eyes, and it is necessary to see with one eye, which is very difficult to see.
Since the ED array is a single color, full color display is not possible,
Also, because of the vibrating mirror, the housing vibrates,
There is a problem that the vibration is transmitted to the head fixing the device and is very uncomfortable.

The present invention solves the above problems.
It is an object of the present invention to provide a full-color head-mounted display that can be seen by both eyes and has little vibration.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a housing for fixing the entire device to the head, an LED array, and an LE placed between both eyes.
A mirror that rotates while reflecting the light of the D array, and 2 for directing the direction of the light reflected by this mirror toward the eyes.
A mirror and an eyepiece for magnifying the image of the LED array are provided, and a control device for blinking the LED array according to the rotation angle of the rotating mirror is provided, and the image is viewed as one image by the afterimage effect of the eyes. It was a head mount display.

According to the second aspect of the present invention, the LED arrays for the three primary colors, red, blue, and green, are arranged at a fixed angle with respect to the rotating mirror, and a control device for sequentially blinking the respective LED arrays is provided. A head-mounted display that can be viewed as a full-color image after being combined by. According to the third aspect of the invention, the head mount display is provided in which the rotating mirror is provided with a transparent cylindrical cover and the covers are rotated together.

[0009]

In the first aspect of the invention, the LE can be seen by both eyes and is controlled by the control device according to the rotation angle of the mirror.
By blinking the D array, the images are arranged in one line in the vertical direction, but they are seen as one image by being horizontally spread due to the afterimage effect of the eyes.

In the second aspect of the invention, the LED array of three primary colors is used, the control device blinks so that full color display can be performed, and it becomes possible to view as a full color image due to the afterimage effect of the eyes. Further, in the third invention, the rotating mirror is provided with a transparent cylindrical cover, and each cover is rotated, so that air resistance due to the mirror is reduced, and noise and vibration are reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described with reference to the drawings. In FIG. 1, reference numeral 1 is a housing for fixing the entire device to a head, 2 is an LED array, and 3 is a rotating mirror, which rotates about a rotation axis 4. Considering the case of forming an image in the left eye, the light emitted from the LED array 2 is reflected by the rotating mirror 3, is reflected in the direction of the eye by the mirror 5, passes through the eyepiece 7, and is formed in the left eye 9. On the contrary, in the case of the right eye, the light emitted from the LED array 2 when the rotating mirror 3 changes its direction by 90 degrees is reflected rightward by the mirror 3 and further reflected in the eye direction by the mirror 6, and the eyepiece 8 An image is formed on the right eye 10 through.

The relationship between the angle of the rotating mirror 3 and the visible image will be described with reference to FIG. The image formed on the left eye 9 is the light from the LED array 2 whose direction is changed by 90 degrees by the mirror 5. Therefore, since the position of the left eye 9 is the same as when the image is viewed from the position of M, the observation point M11 is assumed. In addition, the mirror 3 that also rotates the position of the LED array 2
Since the direction of light can be changed with, the angle of the rotating mirror 3 is 4
If it is 5 degrees, there is an image of the LED array at the position of point N12. Here, the distance from the observation point M11 to the rotation axis 4 of the rotating mirror 3 is m, and the rotation axis 4
Is assumed to be n from n to the image position N of the LED array 2.

For easier calculation, the rotation axis 4 is set as the origin, and the mirror 3 is spread on the x-axis, and the coordinates are set to 45.
When rotated by a degree, the positions of M and N become as shown in FIG. Here, 13 is the observation point M, 14 is the actual position N of the LED array 2, and 15 is the position N ′ of the image of the LED array 2. Since N and N'are mirror-symmetrical to each other about the x-axis, N'is a position where the y coordinate of N is minus. Here, when the distance between M and N ′ is obtained, the length L becomes as shown in the equation 1. Further, when the angle from M to N'is obtained, it becomes as shown in Formula 2, and when the first rotated 45 degrees is subtracted, the position N'of the image of the LED array from the observation point M
Angle θ'is set to 0 when it looks straight ahead,
Is obtained.

[0014]

[Equation 1]

[0015]

[Equation 2] FIG. 4 shows the actual positions of the LED array images. Based on the equations 1 and 2, the angle of the rotating mirror 3 is changed to m = 4 and n = 1 every 5 degrees from 30 degrees to 60 degrees, and the position of the image at each time is shown in the figure. It is 4. Here, 16 is the position of the image of the LED array when θ = 45 degrees, 17 is θ = 60 degrees, and 15 is θ = 30 degrees. As shown in the figure, it can be seen that the image positions spread out in a fan shape according to the angle of the rotating mirror 3 to form images at equidistant positions.

According to the present invention, the image of the LED array 2 is laterally spread and formed according to the rotation angle of the rotating mirror 3. Therefore, by providing a control device, the LED array can blink at high speed. For example, the afterimage effect makes the image appear as a single screen to the eye. FIG. 5 is an embodiment showing a case where the display screen of the present invention is full-colored.
Here, 19 is a red LED array, 20 is a green LED array, and 21 is a blue LED array. Each array is arranged at a constant angle about the rotation axis of the rotating mirror 3. A full-color image can be seen as an afterimage on the eyes by providing a control device and blinking each LED array according to the angle of the rotating mirror 3.

FIG. 6 shows the positional relationship between the angle of the mirror and the image of the LED array of the three primary colors. The actual position of the red LED array 19 is NR22, and the green LED array 2 is
The actual position of 0 is NG23, the actual position of the blue LED array 21 is NB24, and the angle between them is α degrees. Considering the case of θ = 45 degrees, the NG forms an image at the position of 25 by the mirror 26 parallel to the x axis. Also N
R is 2 by the mirror 27 at an angle of α / 2 degrees with respect to the x-axis.
Form an image at position 5. This is the mirror 27
This is because the incident angle becomes equal to the reflection angle when is α / 2 degrees. The same applies to NB, and an image is formed at a position of 25 by the mirror 28 at −α / 2 degrees with respect to the x axis. in this way,
If the mirrors are arranged so that they differ by α / 2 degrees and each LED array blinks, the position 25
You can see a full-color image in which the three primary colors are combined.

FIG. 7 shows an embodiment for reducing the vibration of the present invention. In the embodiment of FIG. 1, the flat mirror is rotated, but when it is rotated at a high speed, such a shape causes vibration and noise, and air resistance is large, resulting in large energy loss. Therefore, as shown in FIG. 7, by attaching a cylindrical transparent cover 29 to the mirror 3 and rotating the cylindrical cover 29 together, noise and vibration can be reduced and energy loss can be reduced.

[0019]

As described above, according to the present invention, a control device is provided so that the image can be seen with both eyes and the afterimage effect of the eye can be used, so that a full-color image can be formed and a cylindrical cover is provided. It is possible to provide a head mount display that realizes low noise and energy saving.

[Brief description of drawings]

FIG. 1 is an explanatory view of a head mount display shown as an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an optical configuration of the present invention.

FIG. 3 is a positional relationship diagram between an observation point of the present invention and an image of an LED array and a mirror.

FIG. 4 is an explanatory diagram of the position of an image on the LED array.

FIG. 5 is an explanatory diagram of an embodiment in which full-colorization of the present invention is performed.

FIG. 6 is a positional relationship diagram of an LED array of three primary colors and a mirror.

FIG. 7 is an enlarged explanatory view of an embodiment of the present invention for reducing noise.

FIG. 8 is an explanatory diagram of a conventional head mount display.

FIG. 9 is an explanatory plan view of a conventional head mount display.

[Explanation of symbols]

 1 Case 2 LED array 3 Rotating mirror 5 Mirror 6 Mirror 19 Red LED array 20 Green LED array 21 Blue LED array 29 Cylindrical transparent cover

Claims (3)

[Claims] 1. A housing for fixing the whole device to a head, an LED array, a mirror which rotates while reflecting the light of the LED array placed between both eyes, and a mirror for rotating the light reflected by the mirror. It is composed of two mirrors for directing the direction toward the eyes and an eyepiece for enlarging the image of the LED array, and L is set according to the rotation angle of the rotating mirror.
A head mounted display characterized by being provided with a control device for blinking the ED array so that it can be seen as one image due to the afterimage effect of the eyes. 2. A controller for arranging three primary color red, blue, and green LED arrays at a certain angle with respect to a rotating mirror and sequentially blinking the respective LED arrays, and combining them by an afterimage effect of eyes. The head mount display according to claim 1, which can be viewed as a full-color image. 3. The rotating mirror is provided with a transparent cylindrical cover, and each cover is rotated.
Head mount display as described.