JPH07261112A - On-head type display device - Google Patents

Abstract

PURPOSE:To obtain ambient visual information on the circumference without necessitating a manual operation by a user. CONSTITUTION:An image forming means 244 is controlled by a whole parts controlling means 246 so as to display a graphic image on a liquid crystal display 23, and when it is detected by a state deciding means 242 based on detection data outputted from a three-dimensional state sensor 21 that the fluctuation state of the user's head comes to a previously set specified fluctuation state, the graphic image display is stopped by the whole parts controlling means 246, a liquid crystal shutter 24 is opened and the visual information to be presented on the line of the user's sight is switched over to the ambient visual information on the circumference.

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 device, and more particularly to control for switching visual information presented on a user's line of sight.

[0002]

2. Description of the Related Art A head-mounted type realistic sensation display device is used for users as described in "Artificial Reality", pages 106 to 112 (published by Nikkan Kogyo Shimbun Ltd., Susumu Tate, 1992). A helmet that is attached to the head so as to integrally change with the head and shields environmental visual information around the user, and a liquid crystal that is supported by the helmet and presents visual information on the line of sight of the user. A display and a magnetic sensor for detecting the movement of the head of the user based on the movement of the helmet are provided, so that a graphic image signal corresponding to the detected state of the head is generated and given to the liquid crystal display. It is configured.

In such a head-mounted type realistic sensation presentation device, when the helmet wearer keeps in touch with the surrounding people or when he or she wants to obtain the environmental visual information of the surroundings to confirm the surroundings, It is necessary to remove the helmet, and there is a problem that the putting on and taking off of the helmet is troublesome.

Recently, there has been proposed a head-mounted presence sensation presentation device which allows a user to manually present a helmet to present visual information about the surrounding environment even when the helmet is worn.

[0005]

However, this type of conventional device cannot be realized while performing other operations with both hands, because the user's manual operation is required when switching the visual information to be presented.

An object of the present invention is to provide a head-mounted display device such as a head-mounted presence sensation presentation device which allows the user to present environmental visual information of the surroundings at a desired time without any manual operation. To do.

Another object of the present invention is to provide a preferred concrete means for presenting the environmental visual information of the surroundings when desired by the user.

[0008]

SUMMARY OF THE INVENTION The present invention comprises a support mounted on the user's head so as to move integrally with the user's head, and shielding environmental visual information around the user. Image display means supported by the support to present visual information on the line of sight of the user, head variation state detection means for detecting movement of the head of the user based on movement of the support, and detected. Image signal generation means for generating an image signal according to the movement of the head and giving it to the image display means, and visual information displayed on the image display means according to the image signal generated by the image signal generation means and the surroundings. In a head-mounted display device comprising presentation visual information selection means for selectively presenting the environmental visual information of the user on the line of sight of the user, the presentation visual information selection means detects the head variation state detection means. Of the user's head Characterized by providing an automatic switching means for switching the visual information presented on the line of sight of the user to the environmental visual information of the surroundings when the dynamic state becomes a predetermined variable state in advance, specifically, The automatic switching means,
When detecting that the state of the head has fluctuated outside the predetermined spatial range, the visual information presented on the line of sight of the user is switched, or the state of the head falls outside the predetermined orientation angle range. When the change is detected, the visual information presented on the line of sight of the user is switched, or when it is detected that the state of the head has changed outside the predetermined spatial range and the orientation angle range. The visual information presented on the user's line of sight is switched.

Further, the supporting body is provided with a surrounding environmental visual information incident portion so as to be positioned on the line of sight of the user, and the presented visual information selecting means is an opening / closing shutter provided in the environmental visual information incident portion, A half mirror provided inside the opening / closing shutter for presenting the display image of the image display means on the line of sight, and the image according to the variation state of the head of the user detected by the head variation state detection means. It is characterized in that it is provided with an automatic switching means for controlling the image display by the display means and the opening / closing operation of the opening / closing shutter, or the presentation visual information selecting means is the image on the line of sight inside the environmental visual information incidence part. An insertion / removal drive means for supporting the display means in an insertable / removable manner, and the image display means is inserted on the line of sight in accordance with the variation state of the head of the user detected by the head variation state detection means. Characterized by comprising an automatic switching means for controlling the insertion and removal driving means so as to.

Further, it is characterized in that a focus adjusting lens acting on a display image and a correcting lens acting on environmental visual information are provided on the line of sight.

According to another aspect of the present invention, the presented visual information selection means includes an environmental image input means for converting environmental visual information around the sight line into an environmental image signal, and use detected by the head variation state detecting means. Automatic change means for changing the display image of the image display means to the environmental image signal obtained by the environmental image input means when the variation state of the head of the person reaches a predetermined variation state. More specifically, the automatic switching means is characterized in that the display image is switched by fade-out and fade-in control.

[0012]

The automatic switching means in the presentation visual information selecting means is arranged so that when the variation state of the user's head detected by the head variation state detecting means reaches a predetermined variation state, the user's visual Since the visual information presented on the line is switched to the visual information of the surrounding environment, the user can obtain the visual information of the surrounding environment without performing a manual operation.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which the head-mounted portion 1 of the head-mounted display device according to the present invention is mounted on the head 101 of the user 100, and the helmet 2 that is attached to and detached from the head 101 is a visual indicator of the surrounding environment. User who takes in information 10
It is provided with the environmental information incident part 3 which is presented on the line of sight of 0.

Inside the helmet 2, as shown in FIG. 2, a three-dimensional state sensor 21 for detecting the three-dimensional position and angle of the helmet 1 is located near the center line of the head 101 on which the helmet 1 is mounted. A liquid crystal display 23, which is an image display device that is provided so as to be located in the vicinity of the top of the head and that bends the display image on the line of sight through the half mirror 22 and presents it to the eyeball 102 as visual information, is further provided. The information entrance unit 3 is provided with a liquid crystal shutter 24 that presents visual information about the surrounding environment through the half mirror 22 on the line of sight and a light-transmitting protective cover 25 that protects the information.

When the display screen of the liquid crystal display 23 is brought close to the eyeball, the viewing angle is widened and the immersive feeling for the displayed image is increased. In order to obtain such an effect, another embodiment of the head mounted portion 1 shown in FIG. 3 is a half mirror 22 and an eyeball 102.
Is provided between the half mirror 22 and the liquid crystal shutter 24. The focus adjustment lens 26 is provided between the half mirror 22 and the liquid crystal shutter 24. The correction lens 27 is provided between the half mirror 22 and the liquid crystal shutter 24 to correct the focus shift caused by the focus adjustment lens 26 when presenting the environmental visual information of the surroundings. Be prepared for. The focus adjustment lens 26 acts so as to bring the liquid crystal display 23 closer to the eyeball 102, and the correction lens 27 acts so as to cancel the operation of the focus adjustment lens 26 when presenting the visual information of the surrounding environment, so that the focus by the eyeball 102 is increased. Makes alignment easier. The constituent elements equivalent to those in the above-mentioned embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 4 shows a control device for such a head mounting portion 1. This control device includes an arithmetic processing unit 200 and a command input means 300. Processor 2
00 is an image signal output that supplies an image signal to the liquid crystal display 23 and a state data input unit 210 that inputs the state detection data from the three-dimensional state sensor 21, an operation signal generation unit 220 that controls the opening and closing of the liquid crystal shutter 24. Means 230 and arithmetic means 240 such as a microcomputer connected thereto are provided.

The arithmetic means 240, as its arithmetic processing function means, calculates the state of the head mounted portion 1 (the head 101 of the user 100) from the state detection data acquired by the state data input means 210. Means 241, state determination means 242 for inputting the calculation result and determining the state of the head mounted portion 1, and image data stored in the image memory 243 for reading and displaying display image data on the liquid crystal display 23. The image generation means 244 for generation, the signal from the state calculation means 241, the state determination means 242 and the command input means 300 are input to the delay signal generation means 24.
5 and the overall control means 246 for controlling the operation signal generation means 220 and the image generation means 244.

The command input means 300 is composed of a keyboard, a joystick, etc., and is used for setting the display range of the generated image data, setting the delay time of the delay signal generating means 245, or inputting work data. .

The state determining means 242 is used by the user 100.
It is a means for determining whether the state of the head 101 is a state in which the graphic image generated by the image generating means 244 should be presented or a state in which visual information on the surrounding environment should be presented. This determination algorithm will be described with reference to FIGS.

The user 100 is in a state in which the head mounting portion 1 is mounted on the head 101 and seated on the chair 110. The liquid crystal display installed in the head mounting unit 1 displays an information image that can be observed in the display space 10 partitioned by the two-dot chain line according to the orientation of the head 101 of the user 100. It is presented on the line of sight of the user 100. That is, the overall control means 246 causes the image generation means 244 to display on the liquid crystal display 23 an image according to the state (position and angle) of the head 101 obtained by calculating the state detection data by the state calculation means 241. Control. Therefore, the display image will change according to the movement of the head 101 of the user 100, and the user 100 will be immersed in the sensation as if he were in the world presented by this display image. Then, the user 100 observes this display image and operates the command input means 300 to give a work command. The display image can be changed by referring to the command input by the user 100 operating the command input means 300.

In such a state, assuming a line-of-sight direction reference line 11a that coincides with the line-of-sight direction of the user 100 and a horizontal direction reference line 11b orthogonal to the line-of-sight direction reference line 11a,
These reference lines 11a and 11b fluctuate along with the fluctuation of the head mount 1, that is, the fluctuation of the head 101 of the user 100. These reference lines 11 under normal use
The fluctuations of a and 11b are within a limited range, and fluctuations that exceed this range are accompanied by actions such as wanting to keep in touch with people around us, checking the surrounding environment, or taking a break. There are many. In this embodiment, in consideration of such a state of use, the line-of-sight direction reference line 11a is based on the back surface boundary line 12 which is assumed to be parallel to the lateral direction reference line 11b along the back surface of the user 100. As shown in
When the lateral orientation angle is changed so as to change until it intersects with the back surface boundary line 12, the user 100
Decides that it wants to present visual information about the surrounding environment, and switches the visual information presented on the line of sight.

This also applies to the case where the user 100 behaves so as to move backward. Such an action is often seen when the user 100 observes the image displayed on the liquid crystal display 23 or works on the image, and interrupts the action to take a break. In consideration of such a state of use, it is preferable in this embodiment to present the environmental visual information of the surroundings when the lateral reference line 11b is retracted to the position behind the rear boundary line 12 as shown in FIG. The visual information presented on the line of sight of the user 100 is determined and switched.

Further, this is the same when the user's 100 line-of-sight direction reference line 11a is elevated above a predetermined angle. In this embodiment, as shown in FIG. 8, the visual information to be presented is switched when the line-of-sight direction reference line 11a is elevated from the horizontal by a predetermined angle ± θ or more.

The change in the state of the head 101 of the user 100 is
The state calculation means 2 is converted into the state detection data by the three-dimensional state sensor 21 as the state variation of the position and the orientation angle of the head mounting portion 1 and is transmitted via the state data input means 210.
41. The state calculation means 241 uses the state detection data to determine the state of the head 101, that is, the sideways angle,
Calculate the front-rear position and the elevation angle. State determination means 244
2 compares the calculation result with a reference set based on the determination algorithm, and the head 101 of the user 100 is switched to the extent that the visual information presented to the user 100 should be switched.
It is determined whether the state of has changed.

Next, the control processing function of the overall control means 246 for selectively switching the visual information presented to the user will be described with reference to FIG. In process 401, the state calculation unit 241 is caused to calculate the state of the head 101 of the user 100, and in process 402, the state determination unit determines whether or not the visual information presented by the head 101 of the user 100 has changed to the extent of switching. Let 242 determine. If there is a change to the extent that it should be switched, the process moves to step 404 to perform time management. This time management is for reducing the load and confusion on the visual sense of the user 100, such as suppression of switching when the state is extremely short-lived and re-switching delay immediately after switching. Yes, delay signal generating means 245
Is processed by referring to the delay time set in advance. When the presentation information switching condition is satisfied, the process proceeds to step 405 to determine which visual information should be presented in the fluctuating state, and from the graphic display image generated by the image generating means 244 in the normal use state to the surrounding environment visual information. If it is the switching mode of No. 3, the process proceeds to step 406.

In this processing 406, the liquid crystal display 2
The image signal output means 230 and the image generation means 244 are controlled so as to stop the graphic image display by No. 3, and the operation signal generation means 220 is controlled so as to open the liquid crystal shutter 24. By this processing 406, the user 10
The liquid crystal shutter 24 and the half mirror 22 are on the line of sight of 0.
It switches so that visual information about the surrounding environment can be presented. In order to reduce the discomfort, this switching is preferably performed by the control of fading out the graphic display image and fading in the visual information of the surrounding environment.

If the switching mode is from the presentation of the environmental visual information of the surrounding environment to the graphic display image generated by the image generating means 244, the process proceeds to step 407. In this processing 407,
The operation signal generating means 22 closes the liquid crystal shutter 24.
Image signal output means 23 for controlling 0 and starting the graphic image display by the liquid crystal display 23.
0 and the image generation means 244 are controlled. By this processing 407, switching is performed so that the graphic display image of the liquid crystal display 23 is presented as visual information via the half mirror 22 on the line of sight of the user 100. In order to reduce the discomfort, this switching is preferably performed by controlling the environment visual information of the surroundings to be faded out and the graphic display image to be faded in.

FIG. 10 shows still another embodiment of the head mounting portion 1 according to the present invention. In this embodiment, the liquid crystal display 23 is inserted into and removed from the user's 100 line of sight by a driving means 28.
Focus adjustment lens 2
6 is integrated so as to be located between the liquid crystal display 23 and the eyeball 102. The head mounting portion 1 does not require a half mirror, so that the optical system is simplified and the dimension of the helmet 2 in the line of sight can be reduced. The constituent elements equivalent to those of the above-described embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

The head mounting portion 1 as described above can be controlled by the same control device as illustrated in FIG. This control device is modified such that the operation signal generating means 220 generates a control signal for operating the insertion / removal driving means 28 instead of controlling the opening / closing of the liquid crystal shutter 24.

Next, the control processing function provided in the overall control device 246 for controlling the head mounted portion 1 illustrated in FIG. 10 to switch the visual information presented to the user will be described with reference to FIG. To do. It should be noted that control processes common to those of the above-described embodiment described with reference to FIG. 9 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the process 405, when it is confirmed that the mode is the switching mode from the graphic display image to the visual information of the surrounding environment, the process moves to the process 411. In this processing 411,
The image signal output means 230 and the image generation means 2 so that the graphic image display by the liquid crystal display 23 is stopped.
In addition to controlling 44, the insertion / removal drive means 28 controls the operation signal generation means 220 so as to raise the optical unit of the liquid crystal display 23 and the focus adjustment lens 26 and retract them from the line of sight. By this processing 411, switching is performed so that the visual information of the surrounding environment incident from the surrounding environment information incident unit 3 is presented on the line of sight of the user 100 as visual information.

In process 405, if it is confirmed that the mode is a mode in which the visual information of the surrounding environment is switched to the graphic display image, the process proceeds to process 412. In this process 412,
The operation signal generation means 220 is controlled to operate the insertion / removal drive means 28 so as to lower the optical unit of the liquid crystal display 23 and the focus adjustment lens 26, and at the same time, the image signal output is started so that the graphic image display by the liquid crystal display 23 is started. The means 230 and the image generation means 244 are controlled. By this processing 412, switching is performed so that the graphic display image of the liquid crystal display 23 is presented as visual information on the line of sight of the user 100. In order to reduce the discomfort, this switching is preferably performed by controlling the environment visual information of the surroundings to be faded out and the graphic display image to be faded in.

FIG. 12 shows still another embodiment of the head mounting portion 1 according to the present invention. Constituent means equivalent to those of the above-described embodiment are designated by the same reference numerals, and overlapping description will be omitted. The feature of this embodiment is that a half mirror 22 and a liquid crystal display 23 corresponding to both eyes 102 are provided, and each liquid crystal display 23 is installed on both front outer sides of the head 101. It is easy to secure a space for arranging the liquid crystal display 23 having a relatively large display surface on both front and outer sides of the head in the helmet 2, and a high-quality display image with a high pixel density can be displayed at a large viewing angle. It becomes easier to present with, and it is possible to enhance the sense of presence.

FIG. 13 shows still another embodiment of the head mounting portion 1 according to the present invention. Constituent means equivalent to those of the above-described embodiment are designated by the same reference numerals, and overlapping description will be omitted. The feature of this embodiment is that the electron tube display 29 is used for displaying a high-quality image with a high pixel density, and the electron tube display 29 is arranged on both sides of the head 101.

The electron tube display 29 has a shape having a relatively large axial dimension. In the helmet 2, it is relatively easy to secure a space for installing the electron tube type display 29 having such a configuration on both sides of the head 101. The display image on each electron tube display 29 is magnified by the magnifying lens 30, and the folding mirror 31 is used.
It is turned back by, is presented on the line of sight by the half mirror, and is incident on the eyeball 102 via the focus adjustment lens 26.

Each of the embodiments described above has a configuration in which the visual information of the surrounding environment is presented to the user 100 so as to be viewed directly. However, the visual information is converted into an electrical image signal and displayed on the liquid crystal display to indirectly. It can also be configured to be presented to. Hereinafter, a head-mounted display device according to the present invention that indirectly presents visual information of the surrounding environment will be described with reference to FIG.
This will be described with reference to FIGS. The constituent elements equivalent to those in the above-described embodiment are designated by the same reference numerals, and the duplicated description will be omitted.

In FIG. 14, the liquid crystal display 23 is always on the line of sight of the user 100 by the folding mirror 32.
Is presented in the display image of. The installation position of the liquid crystal display 23 can be changed, the focus adjustment lens 26 can be added, or the electron tube display 29 and its optical system can be replaced in the same manner as in the above-described embodiments. The environment image input means 33 such as a CCD camera has a function of converting the surrounding environment visual information corresponding to the line of sight into an electric signal (environment image signal).

FIG. 15 shows a control device for controlling the head mounted portion 1. An image for inputting an environmental image signal from the environmental image input means 32 and transmitting the environmental image signal to the image generating means 244. The signal input means 250 is provided. Then, the image generation means 244 uses the liquid crystal display 2
3 is added with a function of selectively changing the image data generated to be displayed on the display unit 3 into either a graphic image signal or an environment image signal based on a control command from the overall control means 246.

Overall control means 246 in this embodiment
As shown in FIG. 16, if the presentation information switching condition is satisfied and the mode is the mode for switching from the graphic display image to the visual information on the surrounding environment in process 405, the process proceeds to process 421. In this processing 421, the image signal output means 230 and the image generation means 2 are switched so that the image display on the liquid crystal display 23 is switched from the graphic image display to the environmental image display.
Control 44. By this processing 421, the user 100
The visual environment information of the surroundings is switched so as to be indirectly presented on the line of sight of. In order to reduce the discomfort, this switching is preferably performed by the control of fading out the graphic display image and fading in the visual information of the surrounding environment.

In the switching mode from the presentation of the environmental visual information of the surrounding environment to the graphic display image, the process proceeds to step 422. In this process 422, the image signal output means 230 and the image generation means 2 are switched so that the image display on the liquid crystal display 23 is switched from the environmental image display to the graphic image display.
Control 44. By this processing 422, the user 100
The visual line is switched so that a graphic image is presented. This switching is preferably performed by controlling to fade out the environment display image and fade in the graphic display image in order to reduce discomfort.

In this embodiment, since the switching of the visual information to be presented is realized by changing the display image on the display by the electric signal processing, the degree of freedom of the switching method for reducing the discomfort is increased.

[0042]

According to the head-mounted display device of the present invention, the visual information presented on the line of sight of the user is switched in accordance with the variation of the head, so that the user manually operates. It is possible to obtain visual information about the surrounding environment without having to.

[Brief description of drawings]

FIG. 1 is an external view showing a state in which a head-mounted portion of a head-mounted display device according to the present invention is mounted on a user's head.

FIG. 2 is a vertical sectional side view showing an embodiment of a head mounting portion according to the present invention.

FIG. 3 is a vertical sectional side view showing another embodiment of the head mounting portion according to the present invention.

FIG. 4 is a block diagram of a control device for controlling the head mounted portion shown in FIG. 2 or FIG.

FIG. 5 is an explanatory diagram of a visual information switching determination algorithm according to the present invention, showing a stereoscopic view state.

FIG. 6 is an explanatory diagram of a visual information switching determination algorithm according to the present invention, showing a lateral variation state.

FIG. 7 is an explanatory diagram of a visual information switching determination algorithm according to the present invention, showing a backward variation state.

FIG. 8 is an explanatory diagram of a visual information switching determination algorithm according to the present invention, showing a depression / elevation angle variation state.

FIG. 9 is a control processing flowchart executed by the overall control means according to the present invention.

FIG. 10 is a vertical sectional side view showing still another embodiment of the head mounting portion according to the present invention.

FIG. 11 is a flowchart of a presentation visual information switching control process of the head mounted unit shown in FIG.

FIG. 12 is a partial cross sectional plan view showing still another embodiment of the head mounting portion according to the present invention.

FIG. 13 is a partial cross-sectional plan view showing still another embodiment of the head mounting portion according to the present invention.

FIG. 14 is a vertical sectional side view showing still another embodiment of the head mounting portion according to the present invention.

FIG. 15 is a block diagram of a control device that controls the head mounted portion shown in FIG.

16 is a flowchart of a presentation visual information switching control process by the control device shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Head mounting part, 2 ... Helmet, 3 ... Environmental information entrance part, 21 ... Three-dimensional state sensor, 22 ... Half mirror, 2
3 ... Liquid crystal display, 24 ... Liquid crystal shutter, 200 ...
Arithmetic processing device, 300 ... Command input means, 242 ... State determination means, 244 ... Image generation means, 246 ... Overall control means.

Claims (9)

[Claims] 1. A support, which is mounted on the head so as to move integrally with the head of the user and shields environmental visual information around the user, and a user supported by the support. Image display means for presenting visual information on the line of sight of the user, head variation state detection means for detecting the movement of the head of the user based on the movement of the support, and the detected head movement according to the movement. An image signal generation unit that generates an image signal and gives it to the image display unit, and the visual information displayed on the image display unit and the surrounding environment visual information according to the image signal generated by the image signal generation unit. In a head-mounted display device including a presentation visual information selection unit that selectively presents on the line of sight, the presentation visual information selection unit is a head of the user detected by the head variation state detection unit. Fluctuation state is predetermined A head-mounted display device, comprising automatic switching means for switching visual information presented on the user's line of sight to ambient environmental visual information when in a changing state. 2. The automatic switching means according to claim 1, wherein the visual information presented on the line of sight of the user is switched when the state of the head is detected to have fluctuated outside a predetermined spatial range. Characteristic head-mounted display device. 3. The automatic switching means according to claim 1, wherein the visual information to be presented on the line of sight of the user is switched when the state of the head is detected to have fluctuated outside a predetermined orientation angle range. Head-mounted display device characterized by: 4. The visual system presented to the user's line of sight when the automatic switching means detects that the state of the head has fluctuated outside a predetermined spatial range and outside a direction angle range. A head-mounted display device characterized by switching information. 5. The support according to claim 1, wherein the supporting body is provided with a surrounding environmental visual information incident section so as to be positioned on the line of sight of the user, and the presentation visual information selecting means is provided in the environmental visual information incident section. Open / close shutter, a half mirror provided inside the open / close shutter for presenting the display image of the image display means on the line of sight, and the variation state of the head of the user detected by the head variation state detection means A head mounted display device, comprising: automatic switching means for controlling image display by the image display means and opening / closing operation of the opening / closing shutter according to the above. 6. The support according to claim 1, wherein the support includes a surrounding environmental visual information incident portion so as to be positioned on the line of sight of the user, and the presented visual information selecting means is inside the environmental visual information incident portion. At the line-of-sight, the insertion / removal drive unit that supports the image display unit so that the image-display unit can be inserted and removed, and the image display unit on the line-of-sight according to the variation state of the head of the user detected by the head variation state detection unit. A head-mounted display device comprising automatic switching means for controlling the insertion / removal driving means so as to be inserted into and removed from the head. 7. The head-mounted display according to claim 1, wherein a focus adjustment lens that acts on a display image and a correction lens that acts on environmental visual information are provided on the line of sight. apparatus. 8. A support, which is mounted on the head so as to move integrally with the head of the user and shields environmental visual information around the user, and a user supported by the support. Image display means for presenting visual information on the line of sight of the user, head variation state detection means for detecting the movement of the head of the user based on the movement of the support, and the detected head movement according to the movement. An image signal generation unit that generates an image signal and gives it to the image display unit, and the visual information displayed on the image display unit and the surrounding environment visual information according to the image signal generated by the image signal generation unit. In a head-mounted display device including a presentation visual information selection unit that selectively presents on the line of sight, the presentation visual information selection unit is an environmental image that converts environmental visual information around the visual line into an environmental image signal. Input means and the head change Automatically switching the image displayed by the image display means to the environmental image signal obtained by the environmental image input means when the varying state of the user's head detected by the moving state detecting means reaches a predetermined varying state. A head-mounted display device comprising switching means. 9. The head mounted display device according to claim h, wherein the automatic switching means performs switching of display images by fade-out and fade-in control.