JPH0894960A - See-through type picture display device - Google Patents

Abstract

PURPOSE: To freely arrange an electronic image and a peripheral real space on the screen of a picture display device. CONSTITUTION: A superposed picture display part 1 is constituted of a light emission type display element consisting of an LCD 3 to which a high-luminance backlight unit 2 is attached, and an image synthesis part consisting of a light shielding part for an external equipment image part 5 utilizing a static driven liquid crystal shutter array and a half mirror 6. An external environment image is transmitted through the half mirror 6 only in an area where the static driven liquid crystal shutter array of the light shielding part 5 is in an open state and directly reaches the eyeball 8 of an observer, and the electronic image is reflected by 90 deg. by the half mirror 6 and reaches the eyeball 8 of the observer. By controlling the external environment image transmitting and shielding areas by using the static driven liquid crystal shutter array, electronic image space display that only the electronic image is displayed and peripheral real space display that only the peripheral real space is displayed are freely arranged on the screen of the picture display device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a real space display window around a person wearing an image display device, a remote image, a computer graphics image, etc. in remote control of a robot, endoscopic surgery, etc. The present invention relates to a see-through type image display device suitable for constructing a window system in which an electronic image space display window consisting of is complexly combined.

[0002]

2. Description of the Related Art In recent years, as a means for presenting a stereoscopic remote image of the robot working space or a stereoscopic endoscopic image inside the patient's body to a robot operator or an operator during remote control of a robot or endoscopic surgery, In place of conventional stereoscopic televisions that use polarized glasses and liquid crystal shutter glasses, a head-mounted display (HMD; Head-mo
unted Display) is starting to be used. In the application of this kind of technology, a person wearing the HMD not only observes an electronic image space such as a remote image or an endoscopic image, but also operates various control devices in the vicinity of the person wearing the HMD. It becomes necessary to observe the real space.

In view of this point, for example, Japanese Patent Laid-Open No. 4-23
Japanese Patent No. 582 discloses a technique relating to an HMD having a flip-up mechanism for flipping up the HMD main body from the face part of the wearer when the wearer observes the surrounding real space.

However, in the HMD having this structure, the electronic image space and the surrounding real space cannot be simultaneously displayed on the window and presented to the wearer, so that the wearer needs to switch between the two spaces many times during the actual work. However, there is a drawback that the operability is extremely poor. Also, so that the electronic image space and the surrounding real space can be presented at the same time,
Only the lower half of the HMD optical system is in the see-through state.
Techniques related to MD have also been proposed, but H
In the MD, since the peripheral real space display window is always fixed, there is a problem that the degree of freedom in the screen arrangement between the electronic image space display window and the peripheral real space display window is insufficient.

Further, in Japanese Patent Laid-Open No. 4-6590,
A technique relating to a see-through HMD in which a completely transparent / completely shielded state of an external image is arbitrarily selectable using a liquid crystal shutter is disclosed. In this case, it was impossible to display only an arbitrary selected area in the surrounding real space.

Regarding these problems, Japanese Patent Application Laid-Open No. 4-17
The technology disclosed in Japanese Patent Laid-Open No. 17-46161 and Japanese Patent Application Laid-Open No. 5-46161, that is, a technology related to a see-through HMD having a function of optically superimposing an arbitrary selected area of an external image and an electronic image can be used. In principle, it can be solved.

In detail, these see-through HMDs
Is a transmissive liquid crystal display device (LCD; Liquid Crystal Display) equipped with a high-brightness backlight unit or a light-emitting display device consisting of a high-brightness cathode ray tube (CRT; cathode-ray tube) and a transmissive dot matrix liquid crystal shutter. The external image part light-shielding means and the image combining means including a half mirror. In the sheath-type HMD having such a configuration, the external image reaches the observer's eyeball directly through the half mirror only in the area where the dot matrix liquid crystal shutter is open.

Therefore, according to this technique, the electronic image space display window and the peripheral real space display window can be freely arranged on the HMD by controlling the transmission / shielding area of the external image by using the dot matrix liquid crystal shutter. Is possible. When an electronic image is superimposed on the external image, the mask image corresponding to the displayed electronic image is displayed on the dot matrix liquid crystal shutter to selectively shield the external image of the electronic image display area, thereby It is also possible to display a clear electronic image on the image.

By the way, in the above-mentioned various techniques relating to HMD, a part of a device such as a helmet is worn on the head, or a part of a device such as goggles is worn on the face. Had a problem that he was robbed of his vision at the same time as wearing the HMD, and he was isolated from his surroundings.

In view of this point, for example, Japanese Patent Laid-Open No. 4-65
Japanese Patent Laid-Open No. 90 also discloses a technology relating to a see-through type HMD which is configured to be able to freely control the completely transmitted / completely shielded state of an external image by using a liquid crystal shutter.

[0011]

However, in the above-mentioned conventional technique, the external image partial light shielding means is used for selectively shielding the external image of the electronic image display area, and therefore the external image partial light shielding is performed. The means required a sufficient number of pixels to be used as a mask for an electronic image and a sufficient transmittance to transmit an external image in an open state. Therefore, in the above-mentioned conventional technique, a dynamic drive simple matrix transmissive black and white liquid crystal display element is adopted as the external image partial light shielding means, but as a drive circuit thereof, it is used in a liquid crystal television or a notebook personal computer. There was a need for a large-scale circuit consisting of an ultra-multistage shift register similar to that used in the above.

However, the shading unit of the external image part shading means necessary only for the purpose of switching between the electronic image space display window and the peripheral real space display window is made much coarser than that for the electronic image mask. However, it is not necessary to select the dynamic drive as the drive method because it can withstand practical use.

TN which is widely used at present
The (STN) mode dynamic drive simple matrix transmissive black-and-white liquid crystal display device can obtain only a maximum contrast ratio of about 20, and achieves a high light-shielding performance of a minimum contrast ratio of 80 or more required as a shutter for shielding an external image. I can't.

Therefore, the conventional apparatus having the above-described configuration is used for the purpose of completely blocking or transmitting the external image and freely arranging the electronic image space display window and the peripheral real space display window on the HMD. Was inappropriate.

Further, in the conventional see-through type HMD with a liquid crystal shutter, since a majority of liquid crystal shutters in normally black mode are used, the H
When the MD was worn, the wearer was blinded at the same time as wearing the HMD and was isolated from the surroundings. Therefore, the wearer can wear the HMD only after performing various initial settings necessary for the normal operation of the HMD. Further, even a see-through type HMD using a normally white mode liquid crystal shutter has not been conventionally configured to shift to a complete light-shielding state when the power is turned on. Therefore, it is necessary to operate the light-shielding switch again after the power is turned on. there were.

In addition to this, although nothing is disclosed in the above-mentioned prior art patent publications, a remote control of a robot or endoscopic surgical operation is actually performed by using a see-through HMD having the above-mentioned external image partial light shielding means. When carrying out the above work, there are various problems to be solved as follows. That is, the first
In addition, since there is individual difference in the distance between the left and right eyes of a human being, the distance between the left and right eye optical systems of the HMD when the HMD is attached is determined by the wearer unless an optical system having a particularly large pupil diameter is used as the HMD optical system. It must be adjusted to be equal to the interocular distance. In particular, when a see-through HMD having an external image part light-shielding means is used as the HMD, a relative positional relationship between the light-emitting display element of each of the left and right HMD optical systems and the external image part light-shielding means when adjusting the interocular distance. If it is not moved while maintaining the above condition, it becomes impossible to keep the correspondence between the electronic image display position and the position of each light shielding region of the external image partial light shielding means constant.

Secondly, when the robot is remotely controlled or the endoscopic surgery is performed, the HMD wearer is free to move to operate various control devices around the wearer. Or you need to move your head. Generally, H
The MD is composed of a helmet or goggle-shaped image display unit and an external control unit that supplies an image signal and a control signal to the image display unit, and both units are connected by a cable. Especially during endoscopic surgery, the length of the unit connection cable is 5 m.
It is not uncommon for the above to occur. Therefore, in order for the HMD wearer to move freely without feeling a sense of restraint or to move the head, the inter-unit connection cable must be made as thin and lightweight as possible.

Thirdly, in the field of remote control of robots, endoscopic surgery, etc., work is performed while freely arranging the electronic image space display window and the peripheral real space display window on the HMD. In some cases, a situation may arise in which the HMD wearer must promptly check the surrounding situation due to an emergency situation or the like. Therefore, see-through type HMD used in these fields
Must be configured so that the external image can be temporarily observed in a wide field of view regardless of the screen layout of each window.

Fourthly, when constructing a window system in which an electronic image space display window and a real space display window are combined in a complicated manner, some kind of electronic image is not displayed on the real space display window in an overlapping manner. Clipping means are required.

Fifth, when observing a real space in which a bright light source such as a light exists through the real space display window, the external image is too bright and the electronic image displayed on the electronic image space display window is observed. It can be difficult. Especially when an LCD is used as a light emitting display element,
This problem becomes significant.

The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to simultaneously present a window display of an electronic image space and a peripheral real space and present it to a wearer, and at the same time, arrange the screen. It is intended to provide a lightweight and highly accurate see-through type head mount display which has flexibility in mounting, and has improved wearability.

[0022]

In order to achieve the above object, a see-through type image display device according to a first aspect of the present invention comprises a light emitting type display element for displaying an electronic image and a plurality of light emitting type display elements arranged in an array. At least an external image part light-shielding means which comprises a static drive liquid crystal shutter and blocks transmission of at least a part of the external image, an electronic image displayed by the light-emitting display element, and at least an external image transmitted through the external image part light-shielding means. And an image composition display unit for optically superimposing a part of the image on the display.

The see-through type image display device according to the second aspect has two sets of the above-mentioned light emitting type display element, the external image part light shielding means and the image synthesizing means, and the first combination is for right eye display. The second combination is characterized in that it is arranged for the left eye display.

Further, the see-through type image display device according to the third aspect includes a light emitting type display element for displaying an electronic image,
The external image part light-shielding means having at least a part in an open state at the time of power-off, the electronic image displayed by the light-emitting display element, and the external image passing through the transmission area of the external image-part light shielding means are optically provided. In the see-through type image display device having an image combining display unit for displaying the image in a superposed manner, the light shielding control unit for forcibly controlling the open region of the external image partial light shielding unit to a light shielding state at the time of power-on To do.

[0025]

That is, in the see-through type image display device according to the first aspect of the present invention, the electronic image is displayed by the light emitting type display element, and the external image partial light shielding means composed of a plurality of statically driven liquid crystal shutters arranged in an array is used. The transmission of at least a part of the external image is blocked, and the electronic image displayed by the light-emitting display element and at least a part of the external image transmitted through the external image partial light shielding unit are optically blocked by the image combining display unit. Is displayed overlaid on.

The see-through type image display device according to the second aspect has two sets of the above-mentioned light emitting type display element, the external image part light shielding means and the image composition means, and the first combination is for the right eye display. The second combination is arranged for left eye display.

Furthermore, in the see-through type image display device according to the third aspect, the electronic image is displayed by the light emitting type display element, and the image synthesizing means has the external image partial light shielding means having at least a part in an open state when the power is shut off. And the electronic image displayed by the light-emitting display element are optically superimposed and displayed. Then, the light-shielding control means forcibly controls the open region of the external-image part light-shielding means to be in a light-shielding state when the power is turned on.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 shows the structure of a see-through type head mount display (hereinafter abbreviated as HMD) according to a first embodiment of the present invention, and will be described.

As shown in FIG. 1, the superimposed image display unit 1
Is a light emitting display element (hereinafter abbreviated as LCD) including a liquid crystal display element 3 in which a high-brightness backlight unit 2 is integrally mounted, and a static drive liquid crystal shutter array 4.
The image synthesizing unit including the external image partial light-shielding unit 5 and the half mirror 6 utilizing the.

To explain this in more detail, in the superimposed image display section 1, the half mirror 6 is arranged at an angle of 45 degrees with respect to the optical axis 7 indicating the line-of-sight direction of the person wearing the HMD of this embodiment. It is set up. The half mirror 6 reflects the electronic image displayed on the LCD 3 by 90 degrees and guides it to the eyeball 8 of the wearer. Further, in front of the half mirror 6, a static drive liquid crystal shutter array 4 in which a plurality of static drive liquid crystal shutter element groups 9 as shown in FIG. Has been done.
The statically driven liquid crystal shutter array 4 selectively shields a part of the external image transmitted through the half mirror 6 and directly guided to the eyeball 8 of the wearer. A black matrix 10 is provided in the lead-out wiring area of the statically driven liquid crystal shutter array 4 for the purpose of preventing transmission of an external image from the area.

In such a structure, the statically driven liquid crystal shutter array 4 exhibits a high transmission characteristic of 40% or more in an open state over a wide viewing angle, and a high contrast ratio of 80 or more can be easily achieved. Since the statically driven liquid crystal shutter element group 9 is formed in an array, only the selected area is reliably shielded from light. Therefore, only the external image transmitted through the open area of the statically driven liquid crystal shutter array 4 is presented to the wearer of the HMD. On the other hand, the electronic image displayed on the LCD 3 is presented to the wearer of the HMD except for the black electronic image display area.

Further, by using the statically driven liquid crystal shutter array 4 for the external light image part light-shielding portion 5, a sufficiently bright external light image can be observed on the peripheral real space display window 12 and the electronic image space display window 11 is displayed. Above, the external image is surely shielded from light, and a clear electronic image can be observed.

Since the see-through type image display device of the first embodiment is constructed as described above, for example, by using the external image part light-shielding portion 5, the external image transmitting / shielding region is shown in FIG. While controlling as shown in FIG.
By displaying an electronic image obtained by clipping the portion corresponding to the external image transmission region as shown in (b),
As shown in FIG. 3C, the wearer of the image display device displays an area 11 (hereinafter referred to as an electronic image space display window) in which only the electronic image is displayed on the composite image of the external image and the electronic image. , Area 12 where only the surrounding real space is displayed
(Hereinafter, referred to as a peripheral real space display window) can be observed at the same time.

That is, by controlling the transparent / light-shielding area of the external image using the external image partial light-shielding portion 5, the display position of the peripheral real space display window 12 can be freely arranged on the screen of the image display device. Agreeing that it is possible, the electronic image space display window 11 also displays the electronic image on the peripheral real space display window 12 by clipping the portion of the electronic image displayed on the LCD 3 corresponding to the external image transmission region. It is possible to freely arrange them on the screen of the image display device without any need.

Incidentally, it goes without saying that various modifications and changes can be made to the respective structures of the first embodiment without departing from the spirit of the invention. For example, in the first embodiment, the example in which the LCD 3 is used as the light emitting type display element is shown. However, in addition to this, a CRT or electroluminescence (EL; Electro Lumine) is used.
scence), plasma display, etc. can be used.

Also, an example in which the static drive liquid crystal shutter array 4 is used as the external image portion light-shielding portion 5 has been shown.
Needless to say, a dot matrix liquid crystal shutter, a mechanical shutter, an electrochromic device, a ferroelectric liquid crystal device or the like may be used as long as a high transmittance and a high contrast ratio can be achieved at the same time.

Further, the counter electrode 13 of each liquid crystal shutter element group 9 forming the liquid crystal shutter array 4 has the common electrode 1 on one side of the glass substrate 14 as shown in the sectional view of FIG.
By providing 5, the number of lead wires can be reduced.

Next, FIG. 5 shows the structure of a see-through type HMD according to the second embodiment of the present invention, which will be described. As shown in FIG. 5, the right-eye superimposed image display unit 16R and the left-eye superimposed image display unit 16L have the same configuration as the superimposed image display unit 1 previously shown in FIG. The superimposed image display portion 16R for the right eye is the mounting member 1 in which the female screw of the right screw is cut.
The left-eye superimposed image display unit 16L is attached to the inter-eye distance adjusting unit 18 by using the attachment member 17L in which the left-handed female thread is cut.

The interocular distance adjusting section 18 has a right-hand male thread on the right side and a left-hand male thread on the left side from the center thereof, and both ends thereof are adjusted for inter-eye distance adjustment. Knobs 19R and 19L are attached. In addition, FIG.
As shown in the side view of FIG. 3, the non-screw parts aR and aL at both ends of the inter-eye distance adjusting unit 18 are attached to the mounting holes c of the frame b.
It is inserted in R and cL. The inter-eye distance adjusting unit 18 and the frame b may be attached at any positions as long as they do not interfere with the observation of the external image.

In such a structure, since the inter-eye distance adjusting unit 18 is configured as described above, when the adjusting knob 19R or 19L is rotated, the superimposed image display unit is displayed according to the rotation direction and the rotation angle. 16R and 16L move toward and away from each other. Further, in the second embodiment, since the relative positional relationship between the light emitting display element and the external image partial light shielding portion is fixed in each of the superimposed image display portions 16R and 16L,
Even when the inter-eye distance is adjusted, both of them move with the relative positional relationship fixed.

As described above, according to the see-through type HMD of the second embodiment, the left and right HMDs are fixed in a state where the relative positional relationship between the light emitting type display element and the external image part light shielding portion is fixed.
Since the distance between the optical systems can be adjusted, as shown in FIG. 3C, if the peripheral space display window 12 and the electronic image space display window 11 are aligned at a certain eye distance, Even if the distance is readjusted, the alignment between the windows does not shift as shown in FIG.

Incidentally, it goes without saying that various modifications and changes can be made to the respective structures of the second embodiment without departing from the spirit of the invention. For example, the inter-eye distance adjusting unit 18 is shown in FIG.
In addition to the configuration using screws as shown in FIG.
As shown in (a) and (b), the superimposed image display unit attachment members 20R and 20L may be inserted into the pantograph mechanism 22 provided in the frame 21. When adjusting the inter-eye distance, the superimposed image display units 16R and 16L are also provided.
It is also possible to move only the light-emitting display element and the external image partial light-shielding portion while the image synthesizing portion is fixed, without moving the whole.

Next, FIG. 9 shows the structure of a see-through type HMD according to the third embodiment of the present invention, which will be described. As shown in FIG. 9, the see-through HMD of the third embodiment is
MD external control unit 23 and HMD video display unit 2
7 and 7.

In detail, the HMD external control unit 2
3 is composed of an external image part light shielding part control signal synthesizing part 24 and an external image part light shielding part external control part 25, and an input video signal is input to one terminal of the external image part light shielding part control signal synthesizing part 24.
The other terminal is connected so that an external image partial light shield control signal from the external image partial light shield external controller 25 is input. The HMD image display unit 27 is
The external image part light-shielding part is composed of a control signal separation part 28, an external image part light-shielding part 29, and a light emitting display element 30. The HMD external control unit 23 and the HMD video display unit 27 are connected to each other by an inter-unit connection cable 26.

In such a configuration, the external image part light-shielding part control signal synthesizing part 24 in the HMD external control unit 23 has the input image signal and the external image part light-shielding part external control part 2.
5 is superimposed on the non-display part of the electronic image video signal by a method similar to that of the television character broadcast, and the video signal is output via the inter-unit connection cable 26 to the video display unit 27. To transmit.

Then, the external image partial light shield control signal separation unit 28 separates the external image partial light shield control signal and the video signal from the input composite signal, and the external image partial light shield control signal is the external image partial light shield. The video signal is output to the unit 29 to the light emitting display element 30.

Further, the input video signal to the light emitting display element 30 is the same as an ordinary television signal in NTSC (National Television).
vision System Committee) signal, an even number
The first few or last few scan lines of each odd field are not displayed on the screen. The external image part light shielding part control signal synthesizing part 24 has the external image part light shielding part 2 in its non-display part.
The open / close state control signal 9 is embedded, and the external image partial light-shielding portion control signal and the input video signal are sent out using the same transmission line. Therefore, the dedicated line for transmitting the external image part light-shielding portion control signal, which is originally required for the inter-unit connection cable 26, is not necessary.

As described above, in the see-through HMD of the third embodiment, the external image part light-shielding portion control signal is superimposed on the input video signal and transmitted, and the video display unit 27 and the external control unit 23 are connected. By reducing the number of cores of the cable 26 to make the cable thinner and lighter, the HMD
It is possible to reduce the feeling of restraint caused by the connection cable 26 when the wearer moves or moves the head.

Although the NTSC signal is assumed as the input video signal in the third embodiment, the PAL (phase alternator) is used.
Other signal formats such as nation line) may be used. Also,
Even when the HMD external control unit 23 and the video display unit 27 are wirelessly connected to each other by using radio waves or infrared rays, the see-through HMD of the third embodiment can reduce the number of necessary communication channels.

Next, FIG. 10 shows the structure of a see-through type HMD according to the fourth embodiment of the present invention, which will be described. This Figure 1
As shown in 0, the see-through HMD according to the fourth embodiment includes an HMD external control unit 31, an inter-unit connection cable 33, and an HMD video display unit 34.

In detail, the HMD external control unit 3
1 has an external image portion light-shielding portion external control portion 32,
The HMD image display unit 34 includes an external image part light shielding part control signal decoding part 35, an external image part light shielding part 36, and a light emitting display element 37.

In such a structure, the external image portion light-shielding portion external control section 32 in the HMD external control unit 31 is provided.
Outputs the external image partial light-shielding portion control signal as a serial signal and transmits it to the video display unit 34 via a dedicated line provided in the inter-unit connection cable 33 separately from the transmission line for the input video signal.

The external image part light shielding part control signal decoding part 35 converts the external image part light shielding part control signal inputted as a serial signal into a parallel signal and uses an external image part light shielding part 36 using a static drive liquid crystal shutter array. Output to. The input video signal is directly input to the light emitting display element 37.

By the way, when a static drive liquid crystal shutter array is used as the external image part light-shielding portion 36, even if one of the counter electrodes is used as a common electrode, at least one independent control signal can be provided as the number of liquid crystal shutter elements. Will be needed. If this required control signal is transmitted from the HMD external control unit 31 via a dedicated signal line one by one, the inter-unit connection cable 33 becomes too thick, so the external image partial light-shielding unit external control unit 32 controls The signal is output as a serial signal, and is converted into a parallel signal by using the external image partial light shielding control signal decoding unit 35 on the HMD video display unit 34 side. By doing so, it is possible to reduce the number of signal lines required to transmit the external image partial light-shielding portion control signal.

As described above, according to the see-through type HMD of the fourth embodiment, the external image unit light-shielding portion control signal is serially transmitted from the external control unit 31 to the image display unit 34, and the connection cable between both units is connected. By reducing the number of cores of 33 and making the cable thin and lightweight, H
When the MD wearer moves or moves the head, the feeling of restraint generated by the connection cable can be reduced. Further, even if the method of the third embodiment cannot be applied because the input video signal is a video signal of a separate sync generated by a computer or the like, the method of the fourth embodiment can be applied.

In the fourth embodiment, it is assumed that a static drive liquid crystal shutter array is used as the external light image part light-shielding portion, but if a parallel type control signal is required, a mechanical shutter or the like is used. Of course, it is okay. Further, even when the HMD external control unit 31 and the video display unit 34 are wirelessly connected to each other using radio waves or infrared rays, the number of communication channels required can be reduced by the method of the fourth embodiment. .

Next, FIG. 11 shows a detailed structure of the external image part light-shielding part control signal decoding part used in the see-through type HMD according to the fifth embodiment of the present invention. However,
In FIG. 11, for simplification of the drawing, only one light shielding area control portion of the external image portion light shielding portion is shown.

As shown in FIG. 11, the rectangular wave generated by the clock generator 39 in the external image part light-shielding portion control signal decoding portion 38 is divided into two, one directly and the other two inputs. Via the ExOR circuit 40,
It is connected to each liquid crystal shutter element counter electrode of the normally white mode statically driven liquid crystal shutter array used as the external image partial light-shielding portion.

A terminal OUT of a 2-input multiplexer 41 for outputting a clock phase control signal is connected to the other input of the 2-input ExOR circuit 40, and a multiplexer switching circuit 42 is connected to a terminal SEL of the multiplexer 41. ing. This 2-input multiplexer 41
Switches between the high level "H" signal and the external image partial light-shielding portion control data signal in accordance with the switching signal output from the multiplexer switching circuit 42, and outputs the signal.

In such a structure, in the fifth embodiment, since the normally white mode static drive liquid crystal shutter array is used as the external image partial light-shielding portion, it is naturally opened completely before the power is turned on. It shows the state. After the power is turned on, if the output signal is at the high level "H", it is in the light-shielded state, and if it is at the low level "L", it is in the open state according to the logic level of the clock phase control signal.

Therefore, the multiplexer switching circuit 42 connected to the control terminal of the two-input multiplexer 41 is configured by a one-shot multivibrator, and from immediately after the power is turned on until the initial setting of the external image partial light-shielding portion control data signal is completed. The time constant is set so that the high-level "H" signal is selected and the external image part light-shielding part control data signal is selected after the initial setting is completed, so that the external image part light-shielding part is completely shielded when the power is turned on. It can be initialized. Here, instead of using the multiplexer switching circuit 42, a signal line indicating the end of initial setting (high level during initial setting, low level at other times) is input to the terminal SEL of the multiplexer switching circuit 42. good.

As described above, in the see-through type HMD of the fifth embodiment, even if the wearer wears the HMD without turning on the power, the wearer can see the external image through the open area of the external image partial light-shielding portion. Can be observed. In addition, it is possible to quickly shift to the electronic image observation state at the same time when the power is turned on. In the fifth embodiment, the multiplexer switching circuit 42 is constituted by a one-shot multivibrator, but the rectangular wave output from the clock generator 39 may be counted appropriately. Of course good things.

FIG. 12 shows the structure of a see-through HMD according to the sixth embodiment of the present invention, which will be described. However, in FIG. 12, in order to simplify the drawing, the HMD image display unit has a monocular structure, and the external image part light-shielding part forced open switch part and the external image part light-shielding part open / closed state holding part are the external image part light-shielding part. Only the part that controls one pixel is shown. Further, the constituent elements that operate in the same manner as in the fifth embodiment will be assigned the same reference numerals as those used in the same embodiment and will not be described.

As shown in FIG. 12, the external image part light shielding part external control part 44 in the HMD external control unit 43 controls the external image part light shielding part output from the external image part light shielding part external control part 44. A data signal and a data latch signal are transmitted via the inter-unit connection cable 45 to the external image part light shielding part open / closed state holding part 47 using a latch provided in the HMD image display unit 46, so that the external image part can be transmitted. It is connected to the light shielding part open / closed state holding part 47.

This external image portion light-shielding portion open / close state holding portion 47
The external image partial light-shielding unit forced-open switch unit 48 to which the latch data from is input is controlled in three states by a state control signal output from a toggle circuit 50 which inverts the logic state each time the switch 49 is pressed. Buffer 51
And a resistor 52 for pulling down the output signal from the 3-state buffer 51, and an external image part light-shielding part control signal decoding part 3 similar to that used in the fifth embodiment.
8 and.

Further, as the external image partial light shielding portion 53 controlled by the external image partial light shielding portion forced opening switch portion 48, as in the fifth embodiment, the normally white mode /
A static drive liquid crystal shutter array is used. Further, the input video signal transmitted from the HMD external control unit 43 via the inter-unit connection cable 45 is
It is input to the electronic image display stopping unit 54 which is composed of an analog switch provided in the HMD video display unit 46. The electronic image display stopping unit 54 includes a toggle circuit 50.
The input video signal or the ground level is output to the light emitting display element 55 based on the state control signal output from the.

In such a configuration, the external image partial light shield control data stored in the external image partial light shield open / close state holder 47 based on the data latch signal output from the external image partial light shield external controller 44 is If the 3-state buffer 51 is not in a high impedance state (hereinafter abbreviated as Z state), it is output to the external image partial light shielding unit control signal decoding unit 38 without changing the logical state.

Since the external image part light-shielding part control signal decoding part 38 and the external image part light-shielding part 53 of the sixth embodiment have the same structure as that of the fifth embodiment, a normally white mode static drive liquid crystal shutter is provided. The open / closed state of the external image partial light shielding portion 53 using the array is complete if the signal related to the external image partial light shield control data held in the external image partial light shield opening / closing state storage portion 47 is at the high level “H”. If the light is shielded and the low level is "L", the state is completely opened.

However, since the output of the 3-state buffer 51 is pulled down, when the 3-state buffer 51 shifts to the Z state due to the state control signal, the external image output to the external image partial light-shielding portion control signal decoding unit 38. The logic level of the partial light-shielding portion control data always becomes the low level "L", and accordingly, the external image partial light-shielding portion 53 also shifts to the fully open state.

Accordingly, the HMD wearer pushes the switch 49 to shift the 3-state buffer 51 to the Z state, whereby the external image part light shielding part control data held in the external image part light shielding part open / closed state holding part 47. It is possible to forcibly shift the external image partial light-shielding portion 53 to the completely open state regardless of the logical level of

When the switch 49 is pressed again from this state, the logic level of the state control signal toggles, the 3-state buffer 51 is no longer in the Z state, and the open / closed state of the external image partial light shielding portion 53 is again the external image partial light shield. This corresponds to the external-field-image partial light-shielding part control data held in the part open / closed state holding part 47.

The electronic image display stopping unit 54 is controlled by the same state control signal as the external image partial light shielding unit forced opening switch unit 48, and the HMD wearer presses the switch 49 to completely open the external image partial light shielding unit 53. Since the display of the electronic image is stopped when shifting, the input signal is not switched and the input video signal is not output to the light emitting display element.

As described above, in the see-through HMD of the sixth embodiment, since the switch 49 is provided on the HMD image display unit 46 side, the wearer can temporarily see the situation of the surrounding real space with a wide visual field. Even when it becomes necessary to observe, it is possible to quickly shift to the external image observation state regardless of the arrangement of the electronic image space display window and the surrounding real space display window, and immediately after the observation of the surrounding situation is completed, the previous window arrangement is immediately performed. It is possible to return to the state.

Further, since the external image portion light-shielding portion forced-open switch portion 48 toggles, the HMD wearer can use both hands freely even in the external image temporary observation state. Furthermore, since the display of the electronic image is stopped with the transition of the external image to the temporary observation state, the external image can be clearly observed without being obstructed by the electronic image.

Incidentally, it goes without saying that various modifications and changes can be made to the respective structures of the sixth embodiment without departing from the spirit thereof. For example, FIG. 12 shows a configuration example in which the HMD image display unit 46 side is provided with the external image part light blocking part open / closed state holding part 47 and the external image part light blocking part forced opening switch part 48. State holding unit 47
And the external image part light-shielding part forced opening switch part 48 to the HMD
It may be provided on the external control unit 43 side.

Next, FIG. 13 shows the structure of an HMD image display unit used in a see-through HMD according to the seventh embodiment of the present invention, and will be described. As shown in FIG. 13, the output of the open / closed state holding unit 61 for receiving the data image signal is connected to the multiplexer 62 and the input to the light shielding unit 63 for the external image, respectively. The output of the sync separation circuit 56 to which the input video signal is input is connected to the input of the electronic image display stopping unit 64, and the horizontal sync counter 57 and the horizontal position counter 5 are further supplied to send out the horizontal sync signal.
It is also connected to 8.

The outputs of the horizontal synchronization counter 57 and the horizontal position counter 58 are connected to the inputs of the superposition correspondence holding unit 60 for sending out signals indicating the scanning line position and the horizontal drawing position, respectively. The output of the holding unit 60 is connected to the input of the multiplexer 62 so as to output the area selection signal. In addition, the clock generation circuit 59 is connected to the horizontal position counter 58 to form a PLL circuit.

In such a configuration, the sync separation circuit 5
The horizontal sync signal separated from the input video signal by using 6 is input to the horizontal sync counter 57 and the horizontal position counter 58 in order to determine the position of the electronic image currently being drawn. The horizontal sync counter 57 determines the scanning line position of the video signal by counting the input horizontal sync signal. The horizontal position counter 58 uses a PLL for the horizontal synchronizing signal.
The horizontal position of the video signal is determined by counting the clocks output from the locked clock generation circuit 59. The electronic image drawing position determined in this way is input to the address line of the ROM or the RAM forming the superimposition correspondence holding unit 60.

On the other hand, the external image part light-shielding part control data signal and the data latch signal are formed by using a latch similarly to the fifth embodiment, and the external image part light-shielding part open / close state holding part 61 is used.
Entered in. Each latch output of the open / close state holding unit 61 of the external image part light shielding part is divided into two and connected to the multiplexer 62 and the external image part light shielding part 63.

The multiplexer 62 selects one of the latch outputs based on the area selection signal output from the superposition correspondence holding unit 60 and outputs it to the electronic image display stop unit 64 as a video display control signal. The electronic image display stopping unit 64 including an analog switch switches the input video signal and the ground level based on the video display control signal, and outputs the signal to the light emitting display element 65.

Further, the superimposition correspondence holding unit 60 is a ROM
Alternatively, it is composed of a RAM, and data k is stored at the address (i, j) in order to express the superimposition correspondence that the electronic image at the drawing position (i, j) is included in the kth light-shielded area. When k is input as the area selection signal, the multiplexer 62 outputs the opening / closing data of the k-th light blocking area held in the open / closed state holding unit 61 of the external image part to the electronic image display stop section 64 as a video display control signal. To do. The electronic image display stopping unit 64 outputs the input video signal to the light emitting display element 65 only when the k-th light shielding region is in the light shielding state. In this way, the display of the electronic image on the open area of the external image partial light-shielding portion 63 can be stopped.

As described above, according to the see-through HMD of the seventh embodiment, when the HMD wearer observes the external image through the peripheral real space display window, the electronic image is displayed on the peripheral real space display window. Since the electronic image is automatically stopped, the electronic image does not overlap the external image, and a clear external image can be observed.

In the seventh embodiment, the video signal is directly input to the electronic image display stopping unit 64. However, by inputting the video signal through the delay circuit, the electronic image drawing position and the video display control signal are input. The deviation from the generation timing can be compensated.

Next, FIG. 14 shows the structure of the transmittance control section used in the see-through type HMD according to the eighth embodiment of the present invention, and will be described. However, in FIG. 14, only the configuration for controlling one pixel of the external image partial light-shielding portion is shown for the transmittance control portion in order to simplify the drawing.

As shown in FIG. 14, the transmittance control section 66 is composed of a clock generator 67 and a 2-input ExOR circuit 68 as in the case of the fifth embodiment. In order to change the voltage value of the drive signal of No. 9, both power supplies are supplied from the output voltage variable DC / DC converter 69.

Furthermore, the reference voltage input that determines the output voltage of the DC / DC converter 69 is selected from among the appropriate reference voltage levels connected to the analog multiplexer 70 based on the drive voltage control signal.

In such a structure, the transmittance control section 6
Reference numeral 6 denotes a static drive liquid crystal shutter element 9 output by the clock generator 67 and the 2-input ExOR circuit 68.
The voltage value of the drive signal is changed by appropriately selecting the reference voltage of the DC / DC converter 69 based on the drive voltage control signal, and the transmittance of each light shielding area of the static drive liquid crystal shutter array 4 is independently controlled. .

As described above, according to the see-through type HMD of the eighth embodiment, the transmittance of each light shielding area of the statically driven liquid crystal shutter array 4 can be independently controlled on a pixel-by-pixel basis. Even if the electronic image displayed on the electronic image space display window is too bright to observe, it is possible to clearly observe both the electronic image and the external image by controlling the transmittance of the peripheral real space display window. Can be adjusted.

In the eighth embodiment, the reference voltage of the DC / DC converter 69 is changed by selecting an appropriate reference voltage using the analog multiplexer 70. However, the D / A converter or the electronic converter is used. The reference voltage may be changed directly by using a volume or the like.

Next, FIG. 15 shows the structure of a transmittance control section used in a see-through type HMD according to the ninth embodiment of the present invention, and will be described. However, in FIG. 15, in order to simplify the drawing, the transmittance control unit shows only a portion for controlling one pixel of the external image partial light shielding unit.

As shown in FIG. 15, the transmittance control section 7
1 is a clock generator 72 and a duty ratio of 50
% Programmable divider 73 and 2-input ExOR circuit 74.

In such a configuration, when the frequency of the liquid crystal drive signal applied between the electrodes in the light-shielding regions of the statically driven liquid crystal shutter array 4 is increased, the liquid crystal molecules gradually drive the drive signal due to the viscosity of the liquid crystal itself. Can no longer be followed, and the light blocking ability will be reduced. Therefore, the original oscillation frequency of the clock generator 72 is set to the liquid crystal shutter element 9.
Is selected as a shutter sufficiently high so as not to exhibit a practical light-shielding ability, and is appropriately divided by a programmable frequency divider 73 based on a frequency division ratio control signal. The transmittance can be controlled independently for each pixel. However, the duty ratio of the frequency-divided output of the programmable frequency divider 73 must be 50% in order to prevent the liquid crystal molecules from being deteriorated by adding a DC component.

As described above, according to the see-through type HMD of the ninth embodiment, since the transmittance of each light shielding area of the static drive liquid crystal shutter array can be controlled independently, the external image is too bright. Even when the electronic image displayed on the electronic image space display window becomes difficult to observe, the transmittance of the peripheral real space display window is controlled,
It is possible to adjust so that both the electronic image and the external image can be clearly observed.

In the ninth embodiment, as a structure for controlling the frequency of the liquid crystal drive signal applied between the light shielding region counter electrodes of the static drive liquid crystal shutter array 4, the original oscillation frequency of the clock generator 72 is programmable. Although the frequency division is performed by using the frequency divider 73, the oscillation frequency of the clock generator 72 may be directly controlled based on an external control signal.

Next, FIG. 16 shows the structure of the transmittance control section used in the see-through type HMD according to the tenth embodiment of the present invention, and will be described. However, parts that operate in the same manner as in the first embodiment are assigned the same numbers as those used in the same embodiment and their explanation is omitted.

In FIG. 16, the transmittance control section 75 displays 2
Statically driven liquid crystal shutter arrays 76, 77
Are superposed so that the respective light-shielding regions coincide with each other. In such a configuration, the drive signals that are independently supplied to the static drive liquid crystal shutter arrays 76 and 77 can completely shield the external image if the two liquid crystal shutter elements 9 are simultaneously shielded. The number of sheets is set to show a certain degree of transparency. Therefore, 1
By setting the one liquid crystal shutter element 9 in the open state and the other liquid crystal shutter element 9 in the light blocking state, it is possible to realize a peripheral real space display window with suppressed transmittance.

As described above, according to the see-through HMD of the tenth embodiment, since the transmittance of each light-shielding area of the static drive liquid crystal shutter array can be controlled, the external image is too bright and the electronic image is too bright. Even when the electronic image displayed on the spatial display window becomes difficult to observe, the transmittance of the peripheral real space display window can be controlled so that both the electronic image and the external image can be clearly observed.

In the tenth embodiment, the transmittance control section 7
5, a static drive liquid crystal shutter array 76,
Although an example in which two 77 are used is shown, it goes without saying that the number of liquid crystal shutter arrays is not limited to two. Further, by using the methods of the eighth and ninth embodiments described above in combination, finer control of the transmittance becomes possible.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and it goes without saying that various improvements and modifications can be made without departing from the spirit of the invention.

Finally, the summary of the see-through type HMD of the present invention is summarized as follows. (1) A light-emitting display element for displaying an electronic image, a plurality of statically driven liquid crystal shutters arranged in an array, an external-image partial light-shielding means for blocking transmission of at least a part of the external image, and the light-emitting display. A see-through type image display device comprising: an electronic image displayed by the element and an image combining display unit for optically superimposing and displaying at least a part of the external image transmitted through the external image partial light shielding unit. .

The embodiment corresponding to the present invention is, for example, the first
And the seventh embodiment. According to this aspect, the dynamic drive liquid crystal array has been conventionally used, but by using the static drive liquid crystal array instead, crosstalk can be eliminated and high contrast can be achieved, so that the display becomes clear. (2) The light emitting display device, the external image partial light shielding unit, and the image composition display unit are provided in two sets, and the first combination is arranged for the right eye display, and the second combination is arranged for the left eye display. The see-through type image display device according to (1) above.

The embodiment corresponding to the present invention is, for example, the second embodiment.
It is an example of. According to this aspect, since the right eye electronic image is presented to the right eye of the HMD wearer and the left eye electronic image is presented to the left eye, the wearer can observe the stereoscopic electronic image. it can. (3) The first combination and the second combination without changing the relative positional relationship between the light emitting display element and the external image partial light shielding unit in the first combination and the second combination. The see-through type image display device according to (1) or (2) above, further including inter-eye distance adjusting means for adjusting the arrangement interval of the combination.

The embodiment corresponding to the present invention is, for example, the second embodiment.
It is an example of. According to this aspect, even if the HMD wearer adjusts the inter-eye distance, the display position in the peripheral real space and the display position in the electronic image space do not shift. (4) A superimposition control unit that superimposes a control signal to be input to the external image part light-shielding means on a portion other than a video transmission portion of an input video signal to be input to the light-emitting display element to create a mixed signal,
A first signal transmission unit for transmitting the mixed signal;
Further comprising a separation control section for separating the mixed signal transmitted by the signal transmission section into a control signal to be inputted to the external image partial light-shielding means and an input video signal to be inputted to the light emitting display element. The see-through type image display device according to any one of (1) to (3) above.

The embodiment corresponding to the present invention is, for example, the third embodiment.
It is an example of. According to this aspect, the external light image part light-shielding portion control signal is superimposed on the input video signal and transmitted, and the number of cores of the connection cable between the video display unit and the external control unit is reduced to make the cable thin and lightweight. By HMD
It is possible to reduce the feeling of restraint caused by the connection cable when the wearer moves or moves the head. (5) A first converter for converting a control signal existing in parallel to the time axis to be inputted to the external image partial light shielding means into a control signal existing serially to the time axis, and the serial control A second signal transmission unit for transmitting a signal,
A second one for converting the control signal transmitted by the second signal transmission section into a control signal existing in parallel with respect to the time axis.
The see-through type image display device according to any one of (1) to (4) above, further comprising:

The embodiment corresponding to the present invention is, for example, the fourth embodiment.
It is an example of. According to this aspect, the external image part light-shielding part control signal is serially transmitted from the external control unit to the image display unit, the number of cores of the connecting cable between both units is reduced, and the cable is made thin and lightweight. When the wearer moves or moves his / her head, it is possible to reduce the feeling of restraint caused by the connection cable. (6) Emissive display element for displaying an electronic image, external image part light-shielding means having at least a part of an open state at power-off, electronic image displayed by the light-emitting display element and external image part light-shielding means A see-through type head mount display having an image synthesizing display means for optically superimposing and displaying an external field image passing through the transparent area of the external image field when the power is applied to the open area of the external image part light shielding means. A see-through type image display device comprising a light-shielding control unit for forcibly controlling the light-shielding state.

The embodiment corresponding to the present invention is, for example, the fifth embodiment.
It is an example of. According to this aspect, the HM without turning on the power
Even if the user wears D, the wearer can observe the external image through the open area of the external image partial light-shielding portion. Also,
It is possible to quickly shift to the electronic image observation state at the same time when the power is turned on. (7) A release control means for forcibly controlling at least a part of the external image partial light shielding means to an open state regardless of a control signal to be input to the external image partial light shielding means, and an operation of the release control means (1) to (6), further comprising: a forced opening switch means for controlling the operation, and an open / closed state holding means for holding information of the open / closed light blocking area immediately before the forced opening of the external image portion light blocking means. The see-through type image display device described in any one of 1.

The embodiment corresponding to the present invention is, for example, the sixth embodiment.
It is an example of. According to this aspect, by pressing the switch provided on the video display unit side, the HMD wearer can shift to the external image temporary observation state with a minimum of movements. (8) The see-through type image display device according to the above (7), characterized in that the forced opening switch means is provided in the image designating device main body.

The embodiment corresponding to the present invention is, for example, the sixth embodiment.
It is an example of. According to this aspect, by pressing the switch provided on the image display unit side, the HMD wearer can shift to the external image temporary observation state with a minimum of movement. (9) A light emitting type corresponding to at least the forced open area of the external image partial light blocking means when the external image partial light blocking means shifts to the forced open means based on the control signal output from the forced open switch means. The see-through type image display device according to (7) above, further comprising electronic image display stopping means for stopping display in the electronic image region of the display element.

The embodiment corresponding to the present invention is, for example, the sixth embodiment.
It is an example of. According to this aspect, when the external image is temporarily observed, the external image can be clearly observed without being obstructed by the electronic image. (10) In the static drive liquid crystal shutter array,
The see-through type image display device according to (1) above, further comprising a transmittance control unit that independently controls the transmittance of each light-shielding region.

The embodiment corresponding to the present invention is, for example, the eighth embodiment.
To 10th Example. According to this aspect, when the external image is too bright and the electronic image displayed on the electronic image space display window becomes difficult to observe, the transmittance of the peripheral real space display window is controlled to reduce the electronic image and the external image. Both can be adjusted to be clearly observable. (11) The transmittance control means is realized by changing a voltage value of a control signal applied between the light shielding region counter electrodes of the static drive liquid crystal shutter array. See-through type image display device.

The embodiment corresponding to the present invention is, for example, the eighth embodiment.
It is an example of. According to this aspect, it is possible to independently control the transmittance of each light shielding region of the static drive liquid crystal shutter array. (12) The see-through according to (10), wherein the transmittance control means is realized by changing a frequency of a control signal applied between the electrodes in the light-shielding regions of the statically driven liquid crystal shutter array. Type image display device.

The embodiment corresponding to the present invention is, for example, the ninth embodiment.
It is an example of. According to this aspect, it is possible to independently control the transmittance of each light shielding region of the static drive liquid crystal shutter array. (13) A plurality of the statically driven liquid crystal shutter arrays are arranged in the light transmission direction, and the light shielding area pattern for each statically driven liquid crystal shutter array is changed by the transmittance control means.
The see-through type image display device according to any one of 0) to 12).

The embodiment corresponding to the present invention is, for example, the first
0 is an example. According to this aspect, it is possible to independently control the transmittance of each light shielding region of the static drive liquid crystal shutter array.

[0114]

As described in detail above, according to the present invention,
The electronic image space and the surrounding real space can be simultaneously displayed on the window and presented to the wearer. Furthermore, the screen layout can be given flexibility. Furthermore, it is possible to provide a lightweight and highly accurate see-through type image display device with improved wearability.

[Brief description of drawings]

FIG. 1 is a see-through type HM according to a first embodiment of the present invention.
It is a side view which shows the structure of D.

FIG. 2 is a plan view showing a configuration of a static drive liquid crystal shutter array.

FIG. 3 is a diagram showing a correctly aligned peripheral real space display window and an electronic image space display window.

FIG. 4 is a cross-sectional view showing a structure of a counter electrode of a static drive liquid crystal shutter array.

FIG. 5 is a front view showing a configuration of a see-through type image display device according to a second embodiment of the present invention.

FIG. 6 is a side view of a frame used in the see-through type image display device according to the second embodiment of the present invention.

FIG. 7 is a diagram showing a peripheral real space display window and an electronic image space display window that are misaligned.

FIG. 8A is a front view showing the configuration of an HMD having an interocular distance adjusting mechanism using a pantograph mechanism.
(B) is a top view explaining a pantograph mechanism.

FIG. 9 is a block diagram showing a configuration of a see-through type image display device according to a third embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a see-through type image display device according to a fourth example of the present invention.

FIG. 11 is a block diagram showing a configuration of an external image partial light shield control signal decoding unit used in a see-through type image display device according to a fifth embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration of a see-through type image display device according to a sixth embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a video display unit used in a see-through type image display device according to a seventh embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration of a transmittance control section used in a see-through type image display device according to an eighth example of the present invention.

FIG. 15 is a block diagram showing a configuration of a transmittance control unit used in a see-through type image display device according to a ninth embodiment of the present invention.

FIG. 16 is a side view showing a configuration of a transmittance control unit used in a see-through type image display device according to a tenth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Superimposed image display part, 2 ... High-intensity backlight unit, 3 ... LCD, 4 ... Static drive liquid crystal shutter array, 5 ... External image part light-shielding part, 6 ... Half mirror, 7 ...
Optical axis, 8 ... Eyeball, 9 ... Static drive liquid crystal shutter element, 10 ... Black matrix, 11 ... Electronic image space display window, 12 ... Peripheral real space display window, 1
3 ... Counter electrode, 14 ... Glass substrate.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] November 14, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

The see-through type image display device according to the second aspect has two sets of the above-mentioned light emitting type display device, the external image part light shielding means and the image composition display means, and the first combination is for the right eye display. , The second combination is arranged for left-eye display.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

Further, in the see-through type image display device according to the third aspect, the electronic image is displayed by the light emitting type display element, and the image synthesizing display means has an external image portion light-shielding at least part of which has an open state at the time of power-off. The external image passing through the transmissive region of the means and the electronic image displayed by the light-emitting display element are optically superimposed and displayed. Then, the light-shielding control means forcibly controls the open region of the external-image part light-shielding means to be in a light-shielding state when the power is turned on.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0100

[Correction method] Change

[Correction content]

The above description is based on the embodiment, but the present invention
The following inventions are included in the detailed description. (1) A light-emitting display element for displaying an electronic image, a plurality of statically driven liquid crystal shutters arranged in an array, an external-image partial light-shielding means for blocking transmission of at least a part of the external image, and the light-emitting display. A see-through type image display device comprising: an electronic image displayed by the element and an image combining display unit for optically superimposing and displaying at least a part of the external image transmitted through the external image partial light shielding unit. .

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0105

[Correction method] Change

[Correction content]

The embodiment corresponding to the present invention is, for example, the fourth embodiment.
It is an example of. According to this aspect, the external image part light-shielding part control signal is serially transmitted from the external control unit to the image display unit, the number of cores of the connecting cable between both units is reduced, and the cable is made thin and lightweight. When the wearer moves or moves his / her head, it is possible to reduce the feeling of restraint caused by the connection cable. (6) Emissive display element for displaying an electronic image, external image part light-shielding means having at least a part of an open state at power-off, electronic image displayed by the light-emitting display element and external image part light-shielding means In a see-through type image display device having an image combining display means for optically superimposing and displaying an external field image passing through the transparent area of the external field image, the open area of the external image part light shielding means is forcibly forced when the power is turned on. A see-through type image display device characterized in that it further comprises a light-shielding control means for controlling the light-shielding state. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 26, 1995

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location H04N 5/64 511 A

Claims (3)

[Claims] 1. A light-emitting type display device for displaying an electronic image, a plurality of statically driven liquid crystal shutters arranged in an array, and an external-image partial light-shielding unit for blocking transmission of at least a part of an external-image, and the above-mentioned light-emission. A see-through type display device, comprising: an electronic image displayed by the pattern display device; and an image combining display unit that optically superimposes and displays at least a part of the external image transmitted through the external image partial light-shielding unit. Image display device. 2. The light emitting display device, the external image part light-shielding means, and the image synthesizing means are provided in two sets, the first combination is arranged for right-eye display, and the second combination is arranged for left-eye display. The see-through type image display device according to claim 1. 3. A light emitting display device for displaying an electronic image,
The external image part light-shielding means having at least a part in an open state at the time of power-off, the electronic image displayed by the light-emitting display element, and the external image passing through the transmission area of the external image-part light shielding means are optically provided. A see-through type head-mounted display having an image combining display means for superimposing and displaying on the screen, a shading control means for forcibly controlling the open area of the external image part shading means to a shading state when the power is turned on. A see-through type image display device characterized by: