JPH08211324A - Head-mounted display device and display device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to realize a compact and lightweight head-mounted display by limiting the parts arranged near the optical means. A display means 102 for displaying an image, a display driving means 106 for displaying an image on a display element, and an illuminating means 103 for illuminating the display means so that the image of the display means 102 clearly reaches an observer. A head-mounted display having an illumination drive unit 104 for turning on the illumination unit, an illumination drive control unit 105 for controlling the illumination drive unit, and an optical unit 101 for optically guiding an image of the display unit to an observer's eye. In the device, the display means 1 is adjacent to the optical means 101.
02 and the illumination means 103 are arranged, and the illumination drive means 104, the illumination drive control means 105, and the display element drive means 106 are arranged in the vicinity of the optical means 101 and the illumination means 103.

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, an EVF such as a video camera and a still camera.

[0002]

2. Description of the Related Art Conventionally, a head mounted display using a small and lightweight liquid crystal panel as a display element has been constructed as shown in FIGS. 7-a and 7-b, for example.

In FIG. 7-a, the light emitted from the backlight 103 passes through the liquid crystal panel 102 and the reflecting mirror 902.
Is reflected by the observer's eye 107 through the eyepiece 101.
Incident on. A still image or a moving image is displayed on the liquid crystal panel 102 by being driven by a liquid crystal drive circuit, and is illuminated to a predetermined brightness with a light amount of a backlight 103 composed of a diffusion plate illuminated by a fluorescent lamp or a thin tube fluorescent lamp for observation. Person's eyes 1
07, the image is observed and perceived. here,
A drive circuit for turning on the backlight, a control circuit, and a circuit for driving the liquid crystal are mounted on a substrate 901 on the backlight.

Further, in FIG. 7-b, the light emitted from the backlight 103 passes through the liquid crystal panel 102 for displaying a still image or a moving image, is reflected by the first reflecting mirror 902-b, and the relay lens 101- 2nd reflecting mirror 9
The light is reflected by 02-a, passes through the eyepiece lens 101-a, and enters the observer's eye 107. The backlight driving substrate 104 for lighting the backlight is arranged on the back surface of the backlight 103, the liquid crystal panel driving circuit 106 is arranged on the upper surface, the lower surface or the side surface thereof, and the backlight driving control signal is supplied from the liquid crystal driving circuit 106 to the backlight. Drive board 10
4 is supplied.

[0005]

However, in the above-mentioned conventional example, since the circuit for lighting the backlight and the circuit for driving the liquid crystal are also arranged in the vicinity of the optical system arranged on the front surface of the observer, the head mount type display. As a result, there is a problem in that the thickness in front of the eye becomes thicker, or the protrusion is formed on the upper part of the eye, so that it is large in size for being worn on the face.

An object of the first invention according to the present application is to reduce the size and size by limiting the parts arranged near the optical means.
The purpose is to realize a lightweight head-mounted display.

The object of the second invention of the present application is also to reduce the size and size by limiting the parts arranged near the optical means.
The purpose of the invention is to realize a lightweight head-mounted display, but it is an effective means when the illumination driving means cannot be separated from the illumination means because of unnecessary radiation or the like.

A third object of the present invention is to arrange the display means, the illumination means, and the illumination drive means in the vicinity of the optical means so that the thickness in the depth direction is thin.

A fourth object of the present invention is to eliminate the need to separately provide an illumination drive control means.

A fifth object of the present invention is to separate the illumination drive means from the illumination means by using a synchronization signal of the image signal or a signal based on the synchronization signal of the image as a control signal for driving the illumination. The purpose of this is to prevent the noise of the illumination drive signal from affecting the image even if it is arranged.

[0011]

In order to achieve the above object, the first invention according to the present invention is to arrange a display means and an illumination means in the vicinity of the optical means, and to provide an illumination drive means and an illumination drive control means. The display driving means is arranged at a position other than the vicinity of the optical means and the lighting means.

In the above construction, for example, when a head mounted display is constructed, the unit arranged near the optical means arranged in front of the eyes serves as the display means and the illuminating means, so that a small and thin display can be constructed. is there.

In the above structure, the illumination drive control means is for supplying a signal for the illumination drive means to boost the voltage required for lighting the illumination means, and the signal in the display drive means can be provided even if it is not provided separately. It may be configured to be used.

According to a second aspect of the present invention, the display means, the illumination means and the illumination drive means are arranged in the vicinity of the optical means, and the illumination drive control means and the display drive means are provided other than in the vicinity of the optical means and the illumination means. It is characterized by arranging.

According to the above arrangement, since the display means, the illumination means and the illumination drive means are arranged near the optical means, when the illumination drive means is arranged other than near the illumination means,
When a problem such as unnecessary radiation occurs, this problem does not occur and a small and thin display can be configured.

In the above structure, the illumination drive control means is for supplying a signal for the illumination drive means to boost the voltage required for lighting the illumination means, and the signal in the display drive means can be provided even if it is not provided separately. It may be configured to be used.

A third invention according to the present invention is characterized in that the display means, the illumination means and the illumination drive means are arranged in the vicinity of the optical means, and the illumination drive means is not arranged in the rear direction of the illumination means. And

According to the above arrangement, even if the illumination driving means is arranged in the vicinity of the optical means, it is not arranged in the back direction of the lighting means, so that it is possible to construct a thin display.

In the above structure, the illumination drive control means is for supplying a signal for the illumination drive means to boost the voltage required for lighting the illumination means, and the signal in the display drive means can be provided even if it is not provided separately. It may be configured to be used.

According to a fourth aspect of the present invention, the control signal supplied from the illumination drive control means to the illumination drive means uses the signal in the display drive means, or the illumination drive control means is provided in the display drive means. It is characterized by

According to the above construction, there is an effect that it is not necessary to separately provide a circuit or substrate for the illumination drive control means.

A fifth aspect of the present invention is characterized in that the control signal sent to the illumination driving means uses a synchronizing signal of an image signal displayed on the displaying means or a signal generated with reference to the synchronizing signal. It was done.

According to the above construction, even if the pulse noise of the illumination driving means is generated, it corresponds to the period in which the image is not displayed. Therefore, even if the illumination driving means is separated from the illumination means, the display is not affected by the noise. effective.

[0024]

【Example】

[First Embodiment] FIG. 1 shows a first embodiment of the present invention. Further, FIG. 8 shows an example of the present optical device worn by an observer. FIG. 1 is a block diagram showing only the portion of the optical device according to the present invention in FIG.

In FIG. 1, 101 is an optical element for guiding the light of an image to the observer's eye, 102 is a display element such as a liquid crystal panel arranged in the vicinity of the optical element, and 103.
Indicates an illumination light source arranged near the optical element. Also,
Reference numeral 104 is an illumination drive circuit for turning on the illumination light source 103, and 105 is an illumination drive control circuit for supplying a control signal to the illumination drive circuit. In this embodiment, the display element 10 is used.
2 is incorporated in the circuit of the display element drive circuit 106 that displays an image on the display 2. The illumination drive circuit 104, the illumination drive control circuit 105, and the display element drive circuit 106 are the optical element 10.
1 and the illumination light source 103 are not arranged in the vicinity thereof, but in the present embodiment, they are arranged in the vicinity of the observer's ear.

In FIG. 1, the light emitted from the illumination light source 103 passes through the display element 102, the image displayed on the display element 102 enters the optical element 101, and guides the image to the observer 107. The display element drive circuit 106 supplies an image signal, a synchronization signal, or the like to the display element 102 to display an image.
The illumination drive control circuit 105 separates, for example, a synchronization signal of an image displayed on the display element 102 and supplies it to the illumination drive circuit 104. The illumination drive circuit 104 is the illumination drive control circuit 1
According to the signal supplied from 05, the DC voltage is converted into a necessary AC voltage, and the illumination light source 103 is turned on.

The optical element 101 transmits the light of an image to the observer's eye 1
The action and operation leading to 07 are shown in FIG. In FIG. 2, the light emitted from the illumination light source 103 passes through the display element 102,
The light becomes light according to the image displayed on the display element 102, passes through the incident surface 101-1 of the optical element 101, and passes through the total reflection surface 10.
The light is incident on the light beam 1-2 at an incident angle equal to or greater than the critical angle, is totally reflected, and then is reflected by the concave mirror 101-3.
The image incident on 01-2 at a critical angle or less is observed by the observer 107 on the display device 102. Here, the concave mirror 101-3 has a predetermined magnification if the position of the eyes of the observer is arranged within the radius of curvature, so that an enlarged virtual image of the image of the display element 102 can be observed.

The display element drive circuit 106, the illumination drive control circuit 105, and the illumination drive circuit 104 are constructed as shown in FIG. 3, for example.

In FIG. 3, the image signal (for example, composite signal) input to the display element drive circuit 106 is Y /
It is input to the C separation circuit 610 and separated into a color signal and a luminance signal. The separated color signals are processed by the color signal processing circuit 611 such as signal level, and then sent to the color demodulation circuit 612. The color demodulation circuit 612 demodulates the BY, GY, and RY signals and sends them to the matrix circuit 614.

On the other hand, the luminance signal separated by the Y / C separation circuit 610 is sent to the sync separation circuit 613, the composite sync signal is cut off, and sent to the matrix circuit 614.
The matrix circuit 614 produces R, G, and B from the input luminance signal (Y signal) and BY, GY, and BY signals, and the video signal processing circuit 615 converts them into signals suitable for driving. It is converted and sent to the H-driver 211 of the display element 102.

The composite sync signal cut out from the sync separation circuit 613 is sent to the timing control circuit 616 to create a timing clock for driving the display element,
It is sent to the H-driver 211 and the V-driver 210.
The H-driver 211 and the V-driver 210 display an image on the display element 102 according to the input timing clock signal and the R, G, B signals.

The video signal input from the outside is Y
It may be a signal separated by / C. When inputting a Y / C separated signal, the Y / C separation circuit 610 is not necessary.

Further, in the present embodiment, the illumination drive control circuit 10
As a control signal supplied from 5 to the illumination drive circuit 104,
The horizontal synchronization signal output from the timing control circuit 616 in the display element drive circuit 106 is used,
The illumination drive control circuit 105 is not separately configured. That is, the display element drive circuit 106 is the illumination drive control circuit 105.
It can also be said that the configuration includes.

The horizontal synchronizing signal output from the timing control circuit 616 as the illumination drive control signal is input to the switching circuit 410 in the illumination drive circuit 104. The switching circuit 410 rectifies and smoothes the horizontal synchronizing signal to obtain a DC voltage, controls the booster circuit 411, and is supplied with a high DC voltage, for example, by switching using a transformer to boost the DC voltage. Then, the backlight 103 of the illumination light source is turned on. When the backlight is lit by AC, DC / AC conversion is performed to obtain a desired voltage and the backlight 103 is lit.

In FIG. 3, the display means includes an LCD display section, a V-driver 210 and an H-driver 211, which are connected to the ground line from the display drive circuit 106 by at least five connecting lines. Is the display drive circuit 1
06, the illumination means is the backlight 103 connected from the booster circuit 411 via two connection lines, and the illumination drive means is the switching circuit 410 and the booster circuit connected by the signal line from the timing control circuit 616. Four
11, the illumination drive control means is a part of the timing control circuit 616, and the optical means does not particularly require an electrical connection line, for example, the total reflection surface 101-2 of FIG.
And an optical element 101 including a concave mirror 101-3.

According to the present invention, for example, when a head mount type display is constructed, only the display element 102 and the illumination light source 103 are arranged in the vicinity of the optical element, and the display element drive circuit 106, the illumination drive circuit 104, etc. are the illumination light source 103. , And in the vicinity of the optical element 102 (in the present embodiment, in the vicinity of the ear), it is possible to realize a small-sized display that is thin in the vicinity of the user's eye and is lightweight.

In this embodiment, the display element drive circuit 1
06, illumination drive circuit 104 and illumination drive control circuit 105
Although it has been placed near the ears, it may be placed at other positions such as the waist and head. Further, the battery of the power source may also be arranged on the waist, the head or the like.

Further, as the illumination drive control means, as shown in FIG. 4, the illumination drive control is performed so as to vary the pulse period or the pulse duty at the start and after the illumination of the illumination with the synchronization signal from the timing control circuit 616 as a reference. It may be provided as the circuit 617. Note that, in FIG. 4, the circuits having the same reference numerals as those in FIG.

Although the optical device for one eye is shown in the mounting view of this embodiment, it may be for both eyes.

FIG. 8 shows a mounting view of the head-mounted display device of this embodiment, and shows an example in which the head-mounted display device is used as a viewfinder for a video camera by connecting with a video camera held in the right hand. The device may be used as a viewfinder for a still camera or other head mounted display.

[Second Embodiment] FIG. 5 shows a second embodiment of the present invention. In FIG. 5, 101 is an optical element that guides the light of an image to the eyes of an observer, 102 is a display element such as a liquid crystal panel arranged near the optical element, and 103 is arranged near the optical element 101. 2 shows an illuminated illumination source. 1
Reference numeral 04 denotes an illumination drive circuit for turning on the illumination light source 103, which is arranged in the vicinity of the back side of the illumination light source 103 in this embodiment. Reference numeral 105 denotes an illumination drive control circuit that supplies a control signal to the illumination drive circuit 104. In this embodiment, the display element drive circuit 1 that displays an image on the display element 102.
It is incorporated in the circuit of 06. Lighting drive control circuit 10
5 and the display element driving circuit 106 are not arranged in the vicinity of the illumination light source 103, but are arranged in the vicinity of the observer's ear in this embodiment.

In FIG. 5, the light emitted from the illumination light source 103 passes through the display element 102, the image displayed on the display element 102 enters the optical element 101, and the concave mirror 101-3 shown in FIG. The image is guided to the observer 107 via the. The display element drive circuit 106 supplies an image signal, a synchronization signal, or the like to the display element 102 to display an image. The illumination drive control circuit 105 separates, for example, a synchronization signal of an image displayed on the display element 102 and supplies it to the illumination drive circuit 104. The illumination drive circuit 104 converts a DC voltage into a necessary AC current according to a signal supplied from the illumination drive control circuit 105, and turns on the illumination light source 103.

According to this embodiment, since the illumination drive circuit 104 is arranged in the vicinity of the illumination light source 103, the illumination drive circuit 104 is placed under the influence of unnecessary radiation, noise, and the like.
This is effective when it is not separated from the lens 3. By adopting this configuration, the shape around the eye can be made relatively thin and small.

[Third Embodiment] FIG. 6 shows a third embodiment of the present invention. In FIG. 6, 101 is an optical element that guides the light of an image to the eyes of an observer, 102 is a display element such as a liquid crystal panel arranged near the optical element, and 103 is arranged near the optical element. Illuminating light source. Reference numeral 104 denotes an illumination drive circuit for turning on the illumination light source 103,
In this embodiment, the illumination light source 103 is arranged in the vicinity other than the back direction. Reference numeral 105 denotes an illumination drive control circuit that supplies a control signal to the illumination drive circuit, which is incorporated in the circuit of the display element drive circuit 106 that displays an image on the display element 102 in this embodiment. The illumination drive control circuit 105 and the display element drive circuit 106 are not arranged in the vicinity of the illumination light source 103, but in the present embodiment, they are arranged in the vicinity of the observer's ear as shown in FIG.

In FIG. 6, the light emitted from the illumination light source 103 passes through the display element 102, the image displayed on the display element enters the optical element 101, and guides the image to the observer 107. The display element drive circuit 106 supplies an image signal, a synchronization signal, or the like to the display element 102 to display an image. The illumination drive control circuit 105 separates, for example, a synchronization signal of an image displayed on the display element 102 and supplies it to the illumination drive circuit 104. The illumination drive circuit 104 converts a DC voltage into a necessary AC voltage according to a signal supplied from the illumination drive control circuit 105, and turns on the illumination light source 103.

According to this embodiment, since the illumination drive circuit 104 is arranged in the vicinity other than the back surface of the illumination light source 103, when the illumination drive circuit 104 cannot be separated from the illumination light source 103 due to the influence of unnecessary radiation or noise. With this configuration, the shape around the eyes can be made thin and small. In this embodiment, the illumination drive circuit 104 is used as the illumination light source 1.
It is particularly effective when the shape of the eye in the up-down direction is small because it is arranged in a direction other than the back direction of 03.

[0047]

As described above, according to the first aspect of the present invention, the display means and the illumination means are arranged adjacent to the optical means, and the illumination drive means, the illumination drive control means and the display drive means are provided. It is possible to construct a small and thin head mount type display by arranging the device other than near the illumination device and the optical device.

According to the second aspect of the present invention, the illumination driving means is provided near the optical means or near the illumination means arranged adjacent to the optical means for conditions such as noise interference and prevention of unnecessary radiation. When it is unavoidable to arrange them, since the illumination drive control means and the display means are arranged other than near the optical means and the illumination means, it is possible to realize a thin and small head mounted display.

According to the third aspect of the present invention, the illumination drive means is provided near the optical means or near the illumination means arranged adjacent to the optical means for conditions such as noise interference and prevention of unwanted radiation. When it is unavoidable to arrange them, the lighting drive means is arranged in a direction other than the back direction of the lighting means, and the lighting drive control means and the display means are arranged other than near the optical means and the lighting means. It is possible to realize a mold display, and in particular, it is possible to reduce the vertical shape of the eye.

According to the fourth aspect of the present invention, the illumination drive control means is separately provided by providing the illumination drive control means in the display drive means or by utilizing the signal generated in the display drive means. There is no need to provide it.

According to the fifth aspect of the present invention, the signal sent from the illumination drive control means to the illumination drive means is generated by using the synchronization signal of the image signal displayed on the display means or by using the synchronization signal as a reference. By using the generated signal, the illumination driving unit is separated from the illumination unit, so that even if noise or the like occurs, the effect of the noise does not appear in the image as much as possible.

Further, the display device according to the present invention is not limited to the head mount type and can be applied to general display devices.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main part of an optical device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing the operation of the optical means of the embodiment of FIG.

FIG. 3 is a block diagram showing a configuration of a display unit, an illumination drive unit, and an illumination drive control unit according to an embodiment of the present invention.

FIG. 4 is a block diagram showing another configuration of the display unit, the illumination drive unit, and the illumination drive control unit according to the embodiment of the present invention.

FIG. 5 is a block diagram showing a main part of a second embodiment of the present invention.

FIG. 6 is a block diagram showing a main part of a third embodiment of the present invention.

FIG. 7 is a conventional head-mounted display device.

FIG. 8 is a conceptual diagram showing an example of mounting the optical device of the present invention.

[Explanation of symbols]

 Reference Signs List 101 optical element 102 display element 103 backlight of illumination light source 104 illumination drive circuit 105 illumination drive control circuit 106 display element drive circuit 107 observer's eyes

Claims (6)

[Claims] 1. Display means for displaying an image, display drive means for displaying an image on a display element, and illumination means for irradiating the display means so that the image of the display means clearly reaches an observer. A head mount type having an illumination drive means for turning on the illumination means, an illumination drive control means for controlling the illumination drive means, and an optical means for optically guiding the image of the display means to the observer's eye. In the display device, the display means and the illumination means are arranged adjacent to the optical means, and the illumination drive means, the illumination drive control means, and the display element drive means are provided other than near the optical means and the illumination means. A head-mounted display device characterized by being arranged. 2. Display means for displaying an image, display drive means for displaying the image on a display element, and illuminating means for irradiating the display means so that the image of the display means clearly reaches an observer. A head mount type display having an illumination drive means for turning on the illumination means, an illumination drive control means for controlling the illumination drive means, and an optical means for optically guiding the image of the display means to the observer's eye. In the device, the display means, the illumination means and the illumination drive means are arranged adjacent to the optical means, and the illumination drive control means and the display element drive means are provided in addition to the vicinity of the optical means and the illumination means. A head-mounted display device characterized by being arranged. 3. Display means for displaying an image, display drive means for displaying the image on a display element, and illumination means for irradiating the display means so that the image of the display means clearly reaches an observer. A head mount type display having an illumination drive means for turning on the illumination means, an illumination drive control means for controlling the illumination drive means, and an optical means for optically guiding the image of the display means to the observer's eye. In the device, the display means, the illuminating means, and the illuminating drive means are arranged adjacent to the optical means, and the illuminating drive means is not arranged in a rear direction of an illumination surface of the illuminating means. The head-mounted display device according to item 2. 4. The head-mounted display device according to claim 1, wherein the illumination drive control means is also used by a circuit in the display drive means. 5. The control signal sent from the illumination drive control means for controlling the illumination drive means is a synchronizing signal of an image signal or a signal based on the synchronizing signal of an image. Item 5. The head-mounted display device according to any one of Items 1 to 4. 6. Display means for displaying an image, display drive means for displaying the image on a display element, and illumination means for irradiating the display means so that the image of the display means clearly reaches an observer. A display device having an illumination drive means for turning on the illumination means, an illumination drive control means for controlling the illumination drive means, and an optical means for optically guiding an image of the display means to the observer's eye, The display means and the illumination means are arranged adjacent to the optical means, and the illumination drive means, the illumination drive control means, and the display element drive means are provided via a connecting line other than the vicinity of the optical means and the illumination means. A display device characterized by arranging.