JPH099301A - Head mount display device - Google Patents

Abstract

PURPOSE: To allow a viewer to enjoy a high definition video image with a video display section corresponding to a usual video image without incurring deterioration in the image quality of the high definition video image, CONSTITUTION: A read control circuit 34 moves a read position of a partial area from a high definition video signal depending on a sensing result of a motion sensor 35 when the high definition video signal is read out of a video memory 36. When a viewer moves an HMD main body, since a part of area of the high definition video image in its moving direction is enjoyed within a visual field of an output pattern, the viewer views all high definition video images by moving the head. Thus, in the case of the HMD having the video display section corresponding to a usual video image, the high definition video image is enjoyed without incurring deterioration in the image quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device, and more particularly to a head mounted display worn by a viewer on his / her head.

[0002]

2. Description of the Related Art There is known a video display device, so-called a head mounted display (HMD), which is provided with a video display unit in close proximity to both eyes of a viewer and is used by being worn on the head. . As this HMD, for example, JP-A-4-61495 and JP-A-5-1839 are available.
There is one disclosed in Japanese Patent No. 43. The thing disclosed in these is formed in a spectacle type appearance. At the time of use, a part corresponding to a temple of eyeglasses is mounted on the head so as to be hooked on the ear, and there is a pair of image display units facing the left and right eyes. Also, as disclosed in Nikkei Electronics, 1993, 14, No. 571, there is also a headband that is worn on the head.

A liquid crystal element, an EL element, or the like is used as the image display section, which is provided in front of both eyes. By displaying the left-eye image and the right-eye image on the left and right display units, respectively, a stereoscopic image can be enjoyed. There is also a transmissive HMD in which a lens for reflecting an image is placed inside a spectacle-shaped screen so that the image displayed on the upper part of the screen is reflected and projected on the screen for viewing. This type can be seen through the screen as well as the outside at the same time as the image on the screen.

[0004]

However, the above background art has the following disadvantages. (1) High-definition video cannot be enjoyed because it does not support high-definition video input such as HDTV. By the way, although it is possible to display by using a high-definition-NTSC down converter, the general HMD image display unit is compatible with conventional systems such as NTSC and has a smaller number of pixels than high-definition images. The image quality of high-definition video cannot be utilized.

(2) To display a multi-image, a plurality of image display units are required. However, in a general HMD, only one image display unit is provided on each of the left and right sides, so the multi-image is input. However, it cannot display this.

The present invention focuses on these points, and an object thereof is to provide a head mounted display which allows a high-definition image to be enjoyed on an image display unit corresponding to a conventional image without degrading the image quality. It is to be.
Another object is to provide a head mound display that allows users to enjoy multiple images on a single image display unit.

[0007]

In order to achieve the above object, according to the present invention, the movement of the apparatus main body is detected by a sensor, and the read area of the video signal from the video signal storage means is detected according to the detection result. Trying to move. In another invention, the movement of the apparatus main body is detected by the sensor, and the writing area of the video signal to the video signal storage means is moved according to the detection result.

When the viewer moves the HMD main body, a part of the high-definition image in that direction is displayed on the image display section. Therefore, the viewer can enjoy the partial area of the high-definition image in that direction by simply moving the head in a desired direction, and can see all the high-definition images by moving the head.

The present invention is also applied to images corresponding to both eyes so that stereoscopic images can be viewed. Furthermore, in the present invention, it is also applied to multi-image,
It is possible to extract and observe a partial area of the multi-image corresponding to the movement of the HMD main body. The above and other objects, features and advantages of the present invention will be apparent from the following detailed description and the accompanying drawings.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS While there may be many embodiments of the present invention, a suitable number of embodiments will now be shown and described in detail.

<First Embodiment> FIG. 1 shows H in the first embodiment.
It is the top view which showed the mechanical structural part of MD. As shown in the figure, the HMD has a goggle shape as a whole, and the image display sections 12R and 12L are attached to the body 10 on the front side of the head so as to be positioned close to both eyes when worn.
Are provided respectively. These image display sections 12R,
12L is a conventional liquid crystal display 1 that supports video input
4R and 14L and backlights 16R and 16L, respectively. In addition, the image display units 12R and 12
On the naked eye side of L, eyepiece lenses 18R and 18L are provided at positions facing the liquid crystal displays 14R and 14L, respectively. On the other hand, on both sides of the main body 10, wearing arms 20R and 20L corresponding to temples of glasses are respectively extended. Speakers 22R and 22L are provided inside the ends of the wearing arms 20R and 20L, respectively. R and L audio signals are supplied to these speakers 22R and 22L from an audio circuit (not shown), and R and L signals corresponding to the viewing video are displayed.
The L sound is reproduced and output.

Further, in the HMD of the first embodiment, vertical sensors 24R and 24L are provided inside the left and right ends of the main body 10, and a horizontal sensor 26 is provided at the center of the main body 10.

Of these, the vertical sensors 24R and 24L
Is a sensor for detecting relative movement of the visual field in the vertical direction, and the horizontal sensor 26 is for detecting relative movement of the visual field in the horizontal direction. The rotation of the visual field can be detected from the detection outputs of the vertical sensors 24R and 24L.

Next, the electrical structure of this HMD is shown in FIG.
As shown in, the writing control circuit 32 controls the writing of the high-definition video signal in the video memory 36, and the reading control circuit 34 controls the reading. The write control circuit 32 and the read control circuit 34 include the sync separation circuit 3
The output side of 0 is connected. In addition, the read control circuit 34
The vertical sensors 24R and 24L and the horizontal sensor 26
The motion detection sensor 35 and the reset switch 40 configured by are connected. The output side of the video memory 36 is connected to the video display units 12R and 12L.

Next, the operation of the first embodiment as described above will be described. The high-definition video signal input from the outside is separated into a sync signal by the sync separation circuit 30, and the sync signal is supplied to the write control circuit 32 and the read control circuit 34, respectively. The write control circuit 32 outputs a write control signal corresponding to the input synchronization signal to the video memory 36. The input high-definition video signal is written in the video memory 36 for each one screen in accordance with the write control signal.

On the other hand, the read control circuit 34 outputs a read control signal corresponding to the input synchronizing signal to the video memory 36. The high-definition video signal written in the video memory 36 is read from the video memory 36 according to the read control signal and output to the video display units 12R and 12L. That is, the same video signal is supplied to the left and right video display units 12R and 12L. In the liquid crystal displays 14R and 14L of the image display portions 12R and 12L, the backlights 16R and 1 driven by a backlight driving device (not shown) are used.
Upon receiving 6 L of light, the same high-definition image is displayed on both left and right eyes. This high-definition image is viewed with both eyes of the viewer through the eyepiece lenses 18R and 18L.

By the way, in the first embodiment, the detection outputs of the motion detecting sensor 35, that is, the vertical sensors 24R and 24L and the horizontal sensor 26 are input to the read control circuit 34, and by the read control signal from the read control circuit 34. The read position of the video signal from the video memory 36 is controlled. FIG. 3 shows the relationship between the high-definition video HP written in the video memory 36 and the video NP read out. High-definition video H is stored in the video memory 36.
P, for example, one screen of a high-definition video with an aspect ratio of 16: 9 is written, but is read out from a normal video, for example, a partial area corresponding to an NTSC video with an aspect ratio of 4: 3 (hatched portion in the figure). It is NP. Therefore, the viewer will appreciate the high-definition video on the output screen corresponding to the partial area NP.

The ratio of the partial area NP read out from the high-definition image HP is as follows, for example, when an image of the NTSC system having an aspect ratio of 4: 3 is read out from an image of the high-definition system having an aspect ratio of 16: 9. . First, in the vertical direction, the scanning line of the high-definition video is 112
Since there are five, 525 of these are selected. The video interlace is maintained as it is.

On the other hand, in the horizontal direction, considering the aspect ratio of the screen, (9/16) × (4/3) × (525/1125) ≈3
/ 8. Therefore, 3/3 of the horizontal pixels of high-definition video
It is sufficient to select 8. In this way, the size of the partial area NP to be read is determined. Next, the position of the read partial area NP in the high-definition image HP is determined by the motion detection sensor 35, that is, the vertical sensors 24R and 24L and the horizontal sensor 2 attached to the main body 10.
It moves according to the detection result of 6. More specifically, if the HMD main body 10 shown in FIG. 1 moves horizontally,
This is detected by the horizontal sensor 26. Read control circuit 34
Moves the read position of the video signal from the video memory 36 in response to this horizontal movement.

4A and 4B show the relationship between the horizontal movement of the viewer's head and the partial area NP to be displayed. As shown in FIG. 4 (A), when the viewer's head FC faces left, the horizontal sensor 26 detects the movement of the head to the left, and the partial area NP on the left side in the high-definition image HP is stored in the image memory. 36, and the liquid crystal display 14R,
It is displayed on 14L. That is, the image at the position corresponding to the horizontal left movement in the high-definition image HP is viewed.

On the other hand, as shown in FIG. 4B, when the viewer's head FC faces to the right, the horizontal sensor 26 detects the movement of the head to the right, and a part of the right side in the high-definition image HP. The area NP is read from the video memory 36 and displayed on the liquid crystal displays 14R and 14L. That is, the image at the position corresponding to the horizontal right movement in the high-definition image HP is viewed.

Next, if the main body 10 of the HMD moves vertically, this is detected by the vertical sensors 24R and 24L. The read control circuit 34 moves the read position of the video signal from the video memory 36 in response to this vertical movement.

FIGS. 4C and 4D show the relationship between the vertical movement of the viewer's head and the partial area NP to be displayed. As shown in FIG. 4C, when the viewer's head FC faces upward, the vertical sensors 24R and 24L detect the movement of the head to the upper side, and the upper partial region NP in the high-definition image HP is displayed. It is read from the video memory 36 and displayed on the liquid crystal displays 14R and 14L. That is, the image at the position corresponding to the vertically upward movement in the high-definition image HP is viewed.

On the other hand, as shown in FIG. 4 (D), when the viewer's head FC faces downward, the vertical sensors 24R and 24L detect the downward movement of the head, and the lower part of the high-definition image HP is displayed. The partial area NP on the side is read from the video memory 36 and displayed on the liquid crystal displays 14R and 14L. That is, the image at the position corresponding to the vertical downward movement in the high-definition image HP is viewed.

This will be explained as follows from the viewer side. The viewer wears the HMD wearing arm 20 shown in FIG.
Wear R and 20L over the left and right ears and wear them on the head. In this state, a partial area NP of the high-definition image HP is displayed as a viewing image on the liquid crystal displays 14R and 14L. When the viewer changes the direction of the head in this state, the change is detected by the sensors 24R, 24L, 26,
Depending on the direction, the position in the high-definition video of the viewing video changes as shown in FIG. If the viewer turns his / her head in a desired direction, a part of the high-definition image in that direction is displayed on the liquid crystal display 14R, 1 as the viewed image.
It is displayed on 4L.

For example, in soccer, assuming a high-definition image in which the ball kicked on the left side of the screen heads to the goal on the right side of the screen, if the viewer moves his / her head from left to right, the ball is moved. It is possible to display the screen as if chasing.

A reset switch 40 is connected to the read control circuit 34, so that the displayed image position can be fixed. That is, the viewer faces in an appropriate direction so that the desired viewing image is displayed,
When the reset switch 40 is operated in this state, the reading control circuit 34 performs a setting operation in which the sensor input is ignored, and the liquid crystal displays 14R, 1 are changed even if the orientation of the head is changed.
The display content of the viewing image on the 4L, in other words, the position of the partial area NP read out from the high-definition image HP is fixed. By using this function, it is possible to perform the initial setting of the relative relationship between the orientation of the viewer's head and the viewing image within the visual field. When the reset switch 40 is released in this fixed state, the read control circuit 34 performs subsequent read control with reference to the sensor input at the time of release.

As described above, according to the first embodiment, when the viewer moves his or her head, a high-definition image in that direction can be viewed within the visual field of the output screen. Since a high-definition image such as a high-definition image has a screen size larger than that of a normal image such as an NTSC image, the viewer can visually recognize only a certain range in the direction in which the line of sight is directed. Therefore, even if a partial area of the high-definition image is displayed according to the movement of the viewer's head as in the present embodiment, the high-definition image can be enjoyed without a feeling of strangeness. In addition, by moving the head, the high-definition image of the entire region can be viewed without deteriorating the image quality of the high-definition image.

<Second Embodiment> Next, a second embodiment will be described with reference to FIG. In the above-described first embodiment, the common video is displayed on the left and right video display units. However, the circuit of FIG. 2 is configured as an independent left and right system, and a high-definition video corresponding to a stereoscopic video considering the parallax of the left and right eyes. By inputting, you can also view a high-definition stereoscopic image.

In FIG. 5, the same reference numerals are used for the components corresponding to those in FIG. 2, and the reference numeral R processes the image for the left eye in the circuit for processing the image for the right eye. The circuits are labeled L respectively. However, for the right eye and the left eye, since it is necessary to extract and display the same region from the high-definition video, the common motion detection sensor 35,
And the read control circuit 34 by the reset switch 40.
Operation control of R and 34L is performed. That is, the detection results from the left and right sensors 24R, 24L and 26 are supplied to the read control circuits 34R and 34L, respectively, and the read areas from the video memories 36R and 36L are controlled based on the detection results. As a result, the left and right image display units 12
Left and right images are displayed on the R and 12L, so that a stereoscopic image of high-definition images can be enjoyed. Since the input high-definition video signals on the left and right are synchronized, the right sync separation circuit 30R is common to L and R. The sync separation circuit 30L may be provided on the left side.

<Third Embodiment> Next, a third embodiment will be described with reference to FIG. In the above-described first embodiment, the read position from the video memory is moved according to the sensor output, but in the third embodiment, the write position to the video memory is moved according to the sensor output.

FIG. 6 shows the configuration of the third embodiment. In addition, the same reference numerals are used for the components corresponding to the above-described embodiments. In the third embodiment, the detection output side of the motion detecting sensor 35 is connected to the writing control circuit 41, and the writing control signal output from the writing control circuit 41 causes the high-definition image signal to be sent to the image memory 42. The writing position is controlled. That is, what is written in the video memory 42 is a partial area NP (see FIG. 3) corresponding to the display range of the conventional video in the high-definition video HP, and the position in this area in the high-definition video is used for motion detection. It is configured to move by the detection outputs of the vertical sensors 24R and 24L, which are the sensors 35, and the horizontal sensor 26.

Next, the operation of this embodiment will be described. HM
If the D body 10 moves horizontally or vertically, this is detected by the motion detection sensor 35. Write control circuit 4
1 is a video memory 42 corresponding to this horizontal or vertical movement.
Move the writing position of the video signal to. That is, the write control circuit 41 performs write control so that the video signal of the partial area NP located in the moving direction detected by the motion detection sensor 35 is written to the video memory 40. The video signal written in the video memory 42 is read by the read control circuit 34, and the video display unit 12R,
12L is supplied and displayed respectively. Since the reset switch 40 is similarly connected to the writing control circuit 41, it is possible to fix the relative positional relationship between the high-definition image and the partial area by operating the reset switch 40.

As described above, in the third embodiment, the video memory 4
At the time of writing the video signal for 2, the partial area NP is taken out from the high-definition video HP corresponding to the movement of the viewer's head. Therefore, as in the case of FIG. 4, the viewer can watch the high-definition image in that direction within the visual field of the output screen by turning his / her head in the direction in which the high-definition image is desired to be viewed. Particularly, in the present embodiment, since it is sufficient that the video memory has a memory area for storing a video signal of a partial area to be output to the video display unit, it is possible to reduce the capacity of the video memory as compared with the above embodiments. .

<Fourth Embodiment> Next, a fourth embodiment will be described with reference to FIGS. Examples 1 to 1 described above
3 is an example of displaying a high-definition video, and the third embodiment is an example of displaying a multi-video. The multi-video is, for example, as shown in FIG. 7, videos displayed on a plurality of display devices (AC in this example) are associated with each other,
It is a video that becomes one video as a whole. In the third embodiment, such a multi-image can be viewed on one HMD. In the following description, the screens corresponding to the display devices A to C in FIG. 7 are called display areas.

FIG. 8 is a circuit block diagram in the fourth embodiment, and the same reference numerals are used for the components corresponding to those in the above-mentioned embodiment. In the fourth embodiment, basically, the three circuit blocks shown in FIG. 2 are connected in parallel. The sync signal separated from the sync separation circuit 30 is supplied to the write control circuits 32a to 32c and the read control circuit 34 of each circuit block.
a to 34c, respectively. The detection output side of the horizontal sensor 26 and the reset switch 40 are commonly connected to the read control circuits 34a to 34c.

The multi-video signals Ma to Mc input in synchronization from the outside are video signals having different contents as shown in FIG. 7, and correspond to the sync signals output from the write control circuits 32a to 32c. By the write control signal
One screen is written in each of the video memories 36a to 36c. The video signals Ma to Mc written in the video memories 36a to 36c are read from the video memories 36a to 36c by a read control signal corresponding to a synchronization signal output from the read control circuits 34a to 34c. The video signals read from the video memories 36a to 36c are combined into one video signal by the video combining circuit 50, and the video display unit 1
Output is displayed on 2R and 12L.

In this case, in this embodiment, the detection result of the horizontal sensor 26 is the read control circuit 34a.
To 34c, which changes the read control signals output from the read control circuits 34a to 34c. FIG. 9 shows the relationship between the input multi-video signal and the output video signal. Of the input multi-video signals Ma to Mc, the video signal Ma corresponds to the left video, the video signal Mb corresponds to the central video, and the video signal Mc corresponds to the right video. In the read control circuits 34a to 34c, the read position and the range of the video signal in each video area are set based on the detection result input from the horizontal sensor 26, and the video signal in the range is read to synthesize the video. It is supplied to the circuit 50. For example, the shaded images MS and MT shown in the figure are read out and combined and displayed.

Next, these operations will be described in detail. If the HMD main body 10 moves in the horizontal direction, this is detected by the horizontal sensor 26. In the read control circuits 34a to 34c, the video signals in the range corresponding to the moving direction detected by the horizontal sensor 26 are read from the video memories 36a to 36c. FIG. 10 shows the relationship between the variation range of the horizontal sensor 26 and the readout range of each video signal. Now, let the detection output of the horizontal sensor 26 be x, and as shown in FIG. 10 (A), the variation range is −1 (maximum in the left direction) ≦ x ≦ 1.
(Maximum in the right direction), the read range y of the video signals Ma to Mc with respect to the detection output of the horizontal sensor 26 is expressed by the following equation. However, in FIG. 10, the left end of each display area is y = 0 and the right end is y = 1.

(1) Video signal Ma x + 1 ≦ y ≦ 1 (-1 ≦ x ≦ 0), not read (0 <x ≦ 1) (2) Video signal Mb 0 ≦ y ≦ x + 1 (-1 ≦ x ≦ 0) , X ≦ y ≦ 1 (0 <x ≦ 1) (3) Video signal Mc is not read (−1 ≦ x ≦ 0), 0 ≦ y ≦ x (0 <x ≦ 1)

Here, taking the case of the output image with diagonal lines shown in FIG. 9 as an example, the detection output of the horizontal sensor 26 is -1≤x.
Since ≦ 0 (see FIG. 10A), the read range of the video signal Ma is x + 1 ≦ y ≦ 1, the read range of the video signal Mb is 0 ≦ y ≦ x + 1, and the read is performed with the video signal Mc. Absent. As a result, the images MS and MT shown by hatching in FIGS. 10B to 10D are read.

FIG. 11 shows an image M of the read range.
An image combined with S and MT is shown. The read images MS and MT are combined by the image combining circuit 50 according to the sequential order of the cut out multi-images. In the illustrated example, the image MS is extracted from the left image and the image MT is extracted from the center image. Therefore, they are synthesized in the order of MS and MT. That is, when the detection output x of the horizontal sensor 26 is on the left side of the center "0" (see FIG. 10A), the image extracted from the image signal Ma is on the left side of the output image, and the image signal Mb is on the right side. Video composition is performed so as to obtain the extracted video. On the contrary, when the detection output x of the horizontal sensor 26 is on the right side of the center "0", the left side of the output image is the image extracted from the image signal Mb, and the right side is the image extracted from the image signal Mc. Then, video composition is performed.
Also in this embodiment, by operating the reset switch 40, the relative relationship between the multi-image and the combined output image can be fixed.

As described above, according to this embodiment, the read range of the multi-image signals Ma to Mc varies depending on the detection position of the horizontal sensor, and the image corresponding to the movement amount of the sensor is extracted from the multi-image and displayed. can do. That is, the display image freely moves within the multi-image. By turning the head in the direction the viewer wants to see, the multi-image corresponding to that direction can be viewed within the visual field of the output screen. By moving the head, all multi-images can be viewed. be able to. In particular, in the past, a plurality of display devices were required for viewing multi-images, but according to this embodiment, one image display unit can enjoy multi-images.

<Other Embodiments> The present invention can be variously modified based on the above disclosure, and includes, for example, the following. (1) Although the liquid crystal display is directly viewed by both eyes in the above embodiment, it may be indirectly viewed by using a mirror or the like. In addition, various design changes are possible to achieve the same effect, such as detecting the movement of the video image captured by the video camera instead of the horizontal and vertical sensors and moving the readout position of the video signal according to the movement. Is.

(2) The above embodiments may be combined. For example, the fourth embodiment can be combined with the second embodiment to realize a multi-stereo image. In addition, by combining the fourth embodiment with the third embodiment, it is possible to reduce the memory capacity and display multiple images. Furthermore, Examples 2, 3, 4
May be combined.

(3) In the above embodiment, the case where the high-definition image is a high-definition image and the NTSC is an ordinary image has been described, but it is of course applicable to other systems. Further, in the above-described embodiment, an example of a horizontal multi-image is shown, but the same is applicable to other directions, for example, a vertical multi-image.

[0047]

As described above, the present invention has the following effects. (1) Since the movement of the HMD is detected and the reading area of the video signal from the high-definition video is moved according to this movement, the viewer can turn the head in the desired direction, You can watch high-definition video within the field of view of the output screen. According to this, since the viewer can see all high-definition images by moving his / her head, even an HMD having an image display unit compatible with conventional images can display high-definition images without degrading the image quality. You can enjoy. High-definition stereoscopic images can be viewed in the same way.

(2) Since the writing area in the video signal is set when writing the image, the memory capacity can be reduced. (3) You can enjoy multi video on one video display.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of a mechanical structure according to a first embodiment of the present invention.

FIG. 2 is a circuit block diagram showing a main part of the electrical configuration of the first embodiment.

FIG. 3 is a diagram illustrating the operation of the first embodiment.

FIG. 4 is a diagram showing the operation of the first embodiment.

FIG. 5 is a circuit block diagram for inputting a stereoscopic image according to a second embodiment.

FIG. 6 is a circuit block diagram showing a main part of an electrical configuration of a third embodiment.

FIG. 7 is a diagram showing a multi-image according to a fourth embodiment.

FIG. 8 is a circuit block diagram showing a main part of an electrical configuration of a fourth embodiment.

FIG. 9 is a diagram showing the operation of the fourth embodiment.

FIG. 10 is a diagram showing the operation of the fourth embodiment.

FIG. 11 is a diagram showing an operation of the fourth embodiment.

[Explanation of reference numerals] 10 ... HMD main body 12R, 12L ... Image display unit (image display means) 14R, 14L ... Liquid crystal display 16R, 16L ... Backlight 18R, 18L ... Eyepiece 20R, 20L ... Wearing arm 24R, 24L ... Vertical Sensor (sensor means) 26 ... Horizontal sensor (sensor means) 30, 30R, 30L ... Sync separation circuit 32, 32a, 32b, 32c, 32R, 32L, 41
Write control circuit (write position control means) 34, 34a, 34b, 34c, 34R, 34L ... Read control circuit (video read control means, read position control means) 35 ... Motion detection sensor 36, 36a, 36b, 36c , 36R, 36L, 42
... video memory (video signal storage means) 40 ... reset switch 50 ... video synthesis circuit (video signal synthesis means) FC ... head HP ... high-definition video Ma, Mb, Mc ... multi-video signals MS, MT ... video NP ... normal Image x ... Horizontal sensor detection position y ... Readout range

Claims (4)

[Claims] 1. An HMD main body mounted on a head; a video display means for displaying an image at a position close to both eyes in the main body; a video signal storage means for storing a video signal supplied from the outside; Video read control means for reading out a partial area of the video signal stored in the signal storage means and supplying it to the video display means; sensor means for detecting the movement of the HMD main body; corresponding to the detection result of this sensor means do it,
A head mounted display comprising: a read position control means for moving a read area from the video signal storage means. 2. An HMD main body mounted on a head; a video display means for displaying a video image at a position close to both eyes in the main body; a video signal storage for storing a partial area of a video signal supplied from the outside. Means; a video reading control means for reading the video signal stored in the video signal storage means and supplying it to the video display means; a sensor means for detecting the movement of the HMD main body; And a writing position control means for moving a writing area of the video signal with respect to the video signal storage means. 3. An HMD main body mounted on the head; an image display means for displaying an image at a position close to both eyes in the main body; a plurality of image signals respectively supplied from outside and corresponding to both eyes. Video signal storage means of the respective video signals stored in the plurality of video signal storage means,
Video read control means for reading a part of the area; sensor means for detecting the movement of the HMD main body; read position control for moving the read area from the video signal storage means in accordance with the detection result of the sensor means. A head-mounted display having means. 4. An HMD main body mounted on a head; an image display means for displaying an image at a position close to both eyes in the main body; a plurality of image signal storage means for storing multi-image signals supplied from the outside. A video read control means for reading out a partial area from the video signals stored in the plurality of video signal storage means; a sensor means for detecting the movement of the HMD main body; A head mounted display comprising: a read position control means for setting a read area from the video signal storage means; a video signal synthesizing means for synthesizing the areas read by the read position control means and supplying the synthesized video signal to the video display means.