JPH10322624A - Head display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely move with a head display mounted without limiting a movable range. SOLUTION: Relating to a head display 10 which consists of a transmitting unit 20 for a video signal and an audio signal and a receiving unit 30 which receives and outputs the video and audio signals, a video-audio signal transmitting unit of the transmitting unit 20 side converts a video signal and an audio signal which are inputted from a video deck into an RF signal and sends it, and also, a video-audio signal receiving unit on the unit 30 side receives the RF signal, demodulates the video and audio signals, performs video output to LCDs 32 that are arranged in front of the eyes of a user and performs audio output to earphones 33. Therefore, it is possible to offer a head display which is freely movable with the unit 20 mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head display which displays an image in front of a user and reproduces sound audibly.

[0002]

2. Description of the Related Art Conventionally, a technique shown in FIG. 6 is known as this kind of technique. In FIG. 1, a head display 1 is formed in a general spectacle type, and an LCD 2 is arranged so that a user can look at the eye while wearing the head display 1 so that an output image can be visually recognized. , 3 lead out earphones 3a, 3a, and output sounds can be heard through the earphones 3a, 3a. The output video and output audio source signals here are generated by the VCR 4 and the
Is input to the head display 1 via the. The video deck 4 includes an infrared light receiving unit (not shown), and various operations can be performed with the remote controller 4a.

[0003]

The above-mentioned conventional head display has the following problems. Since the head display 1 and the video deck 4 are connected by the cable 5, it was difficult to move when the head display 1 was mounted. Also, if the length of the cable 5 is sufficiently long, the movable range is widened, and if the user carries the remote controller 4a, the remote controller can be operated. However, when the cable 5 is long, the cable 5 is likely to be entangled, and when there is an obstacle such as a wall between the video deck 4 and the remote controller 4a, it may be impossible to operate the remote controller.

[0004] The present invention has been made in view of the above problems, and has as its object to provide a head display which can be freely moved in a mounted state.

[0005]

To achieve the above object, the invention according to claim 1 comprises a transmitting unit for transmitting a video signal and an audio signal, and a receiving unit for receiving and outputting the video signal and the audio signal. A head display, wherein the transmission unit includes a transmission unit that transmits a video signal and an audio signal as inputs and via a spatial transmission medium,
The receiving unit includes a receiving unit configured to receive a video signal and an audio signal transmitted by the transmitting unit via the spatial transmission medium, and displays an image in front of the eyes based on the received video signal mounted on a head. And a sound reproducing means for reproducing sound at a position where it can be heard based on the received sound signal.

In the invention according to claim 1 configured as described above, the head display includes a transmitting unit that transmits a video signal and an audio signal, and a receiving unit that receives and outputs the video signal and the audio signal. The transmitting unit transmits the video signal and the audio signal via the spatial transmission medium by the transmitting means. Here, the spatial transmission medium is
It refers to any transmission medium that can transmit space as a signal, such as, but not limited to, light and ultrasonic waves. As an example, the invention according to claim 2 is the head display according to claim 1, wherein the spatial transmission medium is constituted by radio waves, and signals are transmitted and received even in a place where a spatial transmission medium such as light cannot reach. Becomes possible. Of course, the frequency band of the radio wave is not particularly limited, and various bands can be used. For example, an unused channel of the VHF band or the UHF band may be used.

[0007] The video signal and the audio signal transmitted by the spatial transmission medium are received by the receiving means on the receiving unit side. The video signal is output in front of the user's eyes by video display means mounted on the head, and the audio signal is reproduced by the audio reproduction means so that the user can listen. Here, the sound reproducing means only has to be able to reproduce sound so that the user can listen to the sound, and the configuration thereof is not particularly limited. For example, it may be a headset type audio output device or a general box-shaped speaker.

Incidentally, since the above-mentioned receiving means receives a video signal and an audio signal via a spatial transmission medium, it naturally has a receiving antenna. Various forms can be applied to this receiving antenna, and a dipole antenna is generally known as a VHF or UHF receiving antenna. Of course, the shape of the receiving antenna is not limited to this, and as an example, according to the invention according to claim 3, in the head display according to claim 2, the receiving means includes a loop-shaped user's head. And a receiving antenna formed on the periphery of the antenna.

[0009] That is, the receiving antenna is mounted on the periphery of the user's head, and the video signal and the audio signal are received via the receiving antenna. Here, as an example of a specific configuration, transmission and reception of a video signal and an audio signal are performed using radio waves in a frequency band near the UHF band 500 MHz.
Then, the wavelength λ of the radio wave is λ = c / f (c: speed of light,
f: frequency), and the value is about 60 cm, which is suitable in accordance with the circumference of the adult head.

However, there is a problem that an infrared remote control has a limited reachable area, and cannot be used in a range where it cannot be seen. Therefore, in the head display according to claim 4, claim 1 to claim 3
In the head display according to any one of the above, the receiving unit includes an infrared remote control signal receiving unit that receives an infrared remote control signal, and a remote control signal transmitting unit that transmits a remote control signal via a radio wave, the transmission unit includes: The remote control signal transmitting means includes a remote control signal receiving means for receiving a remote control signal transmitted via radio waves, and an infrared remote control signal light emitting means for converting the received remote control signal into an infrared remote control signal and emitting light. .

[0011] In the invention according to claim 4, the infrared remote control signal received by the infrared remote control signal receiving means on the receiving unit side is transmitted to the transmitting unit via a radio wave by the remote control signal transmitting means. Sent to. The transmission unit includes a remote control signal receiving unit. The remote control signal transmitted via radio waves is received by the remote control signal receiving unit, and is output as an infrared remote control signal by the infrared remote control signal emitting unit.

[0012]

As described above, the present invention can provide a head display which can be freely moved while mounted. According to the second aspect of the present invention,
Signals can be transmitted and received even in places where light cannot reach. Further, according to the third aspect of the present invention, the receiving antenna can be prevented from being in the way. Furthermore, according to the invention according to claim 4, it is possible to provide a head display that can be operated by remote control even in a place where infrared light cannot reach, such as an adjacent room.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a head display according to an embodiment of the present invention. In FIG. 1, a head display 10 includes a transmitting unit 2.
0, so-called headset type receiving unit 30
It is composed of The transmitting unit 20 is formed in a substantially box shape, on the front surface of which is formed an input terminal 21 comprising a video input terminal VI and an audio input terminal AI, and an infrared light emitting section 20b4, and on the upper surface, a transmitting antenna 20a3 and a remote control signal. The receiving antenna 20b1 is formed.

FIG. 2 is a block diagram showing the electrical connection of the transmitting unit 20. The transmitting unit 20 includes a video / audio signal transmitting unit 20a and a remote control signal receiving unit 20b. The video / audio signal transmission unit 20a has a video input terminal VI and an audio input terminal AI, and the video deck D
And a video output terminal VO and an audio output terminal AO. The video signal and the audio signal generated by the video deck D are input to the modulation circuit 20a1 of the video / audio signal transmission unit 20a via the same cable.
The modulation circuit 20a1 can be configured by an RF circuit or the like. After the modulation circuit 20a1 modulates the RF signal in the vicinity of 500 MHz in the UHF band, amplifies the power in the amplification circuit 20a2, and transmits the signal via the transmission antenna 20a3. I do.
Therefore, the video / audio signal transmission unit 20a constitutes a transmission unit.

In this embodiment, the UHF band 500M
Although an RF signal in the vicinity of Hz is used, various bands can be applied as a frequency band to be used, and the present invention is not limited to this. For example, a VHF band may be used,
Another band of the HF band may be used. Further, the present invention is not necessarily limited to using radio waves as a spatial transmission medium, and can be changed as appropriate, such as using light or using ultrasonic waves. Further, in the present embodiment, the input signals of the video signal and the audio signal are obtained from the video deck D, but the present invention is not limited to this, and may be obtained from the output terminal of a video disk, for example. And
It can be changed as appropriate, for example, from an output terminal of a video game. Of course, a plurality of input signals may be switched using a predetermined switch mechanism.

The remote control signal receiving unit 20b receives a remote control signal modulated as described later via a remote control signal receiving antenna 20b1 and a tuning circuit 20b2, demodulates the demodulated signal by a demodulation circuit 20b3,
4 emits an infrared remote control signal. In this sense, the remote control signal receiving antenna 20b1 to the demodulation circuit 20b3 constitute remote control signal receiving means, and the infrared light emitting section 20b4
Constitute infrared remote control signal light emitting means. Of course, this infrared remote control signal is a remote control signal for performing various operations such as reproduction / stop and fast forward / rewind of the video deck D.

The receiving unit 30 includes a roughly cap-type headset 31, LCDs 32 arranged so as to be located just in front of the user when the user wears the headset 31, and both sides of the headset 31. It has earphones 33, 33 extending from the ends, and a casing 34 arranged at the rear of the headset 31 and accommodating a plurality of circuit groups including a power supply. A band-shaped receiving antenna 30a1 and a remote control signal transmitting antenna 30b4 formed in a loop shape are arranged on the periphery of the headset 31. The receiving antenna 30a1 receives the RF signal, and forms a part of the video / audio signal receiving unit 30a. On the other hand, the remote control signal transmitting antenna 30b4 transmits a modulated remote control signal as described later,
A part of.

By the way, as described above, the band of the RF signal is U
Since the frequency is 500 MHz in the HF band, the wavelength λ is λ =
c / f (c: speed of light, f: frequency), about 60 cm
Becomes Considering that the peripheral length of the headset 31 is also attached to the head, the length is approximately 60 cm, and it is possible to equip the receiving antenna 30a1 in the form of a loop on the peripheral edge of the headset 31 so as not to interfere. It is preferable. For the same reason, the remote control signal transmitting antenna 30b4 is also formed in a loop around the headset 31.

FIG. 3 is a block diagram showing the electrical connection of the receiving unit 30.
Is composed of a video / audio signal receiving unit 30a and a remote control signal transmitting unit 30b. The video / audio signal receiving unit 30a transmits the RF signal transmitted by the transmitting unit 20 to the receiving antenna 30a1 and the tuning circuit 30a2.
And input to the IF circuit 30a3. In this sense, the receiving antenna 30a1 and the tuning circuit 30a2 constitute a receiving unit.

The IF circuit 30a3 converts an RF signal input using a local oscillator (not shown) for generating a continuous wave of a predetermined frequency into a video signal of 58.75 MHz and an audio signal of 5
The frequency is converted to an intermediate frequency signal of 4.25 MHz and amplified. The sound is detected and amplified by the sound detection and amplification circuit 30a4.
The sound is detected at and the frequency change is returned to the amplitude change of the sound.
After the low frequency amplification by the audio output circuit 30a5, the earphone 3
3, 33 and output. In this sense, the audio detection / amplification circuit 30a4, the audio output circuit 30a5, and the earphones 33 constitute an audio reproducing unit. Of course, the sound reproducing means only needs to be able to reproduce the sound at a position where the user can listen, and it is not always necessary to use the earphone, and the sound reproducing means may be external to the headset 31. .

On the other hand, for the video, the video detection and amplification circuit 3
After detecting the video at 0a6, the luminance / color signal processing circuit 30
The image is amplified at a7. Thereafter, in the luminance / color signal processing circuit 30a7, the input signal is separated into a luminance signal Y and a color signal.
Synchronous detection and demodulation are performed at the phases -Y and RY, and both are added at a predetermined ratio to generate GY. Then, the demodulated BY signal, GY signal, RY signal and luminance signal Y
Are primary color signals (R, G,
B) and converted to the LCD via the video output circuit 30a8.
32, 32 and output. This LCD 32
This is a liquid crystal display employing the so-called DSTN system, which has an X-axis driver, a Y-axis driver, a backlight, a synchronization circuit (not shown), and the like, and outputs an image based on the primary color signals. The tuning circuit 30a2 to the video output circuit 30a8 are housed in a casing 34 provided at the rear of the headset 31.

Of course, the output method of the LCD 32 is not limited to the above method, and a TFT method may be used, or a CRT display may be used without using an LCD. However, since it is a head display, it can be said that an LCD having a small power consumption and a small installation area is more advantageous. On the other hand, the remote control signal transmission unit 30b
Are an infrared light receiving section 30b1, a modulation circuit 30b2, an amplification circuit 30b3, and a remote control signal transmission antenna 30b4.
It is composed of

The remote control R emits an infrared remote control signal to perform various operations on the video deck connected to the transmission unit 20, and the infrared remote control signal is received by the infrared light receiving section 30b1. Infrared light receiving section 30b1
The amplification circuit 30b3 is also housed in the casing 34, and only the infrared light receiving section 30b1 is exposed on the surface of the casing 34 so as to be able to receive light. Infrared receiver 30b
The remote control signal received at 1 is FM-modulated by the modulation circuit 30b2 into a remote control signal near the VHF band 70 MHz. Thereafter, the modulated remote control signal is supplied to the amplifier circuit 30.
b3, the power is amplified and the remote control signal transmitting antenna 30
b4. Therefore, the infrared receiving unit 30b
Reference numeral 1 denotes an infrared remote control signal receiving means, and a modulation circuit 3
0b2 to the remote control signal transmitting antenna 30b4 constitute a remote control signal transmitting means.

As described above, by modulating the infrared remote control signal into radio waves and transmitting the signal, it is possible to operate the remote control even in a place where infrared light cannot reach. Of course, the radio wave used as the remote control signal is not limited to the above band, but may use another band of the VHF band or use the UHF band. Next, the operation of the present embodiment will be described with reference to the drawings. When the user uses the head display 10, first, the video output terminal VO and the audio output terminal AO of the video deck D, which are input sources of video and audio, are connected to the transmission unit 2.
A cable is connected to each of the video input terminal VI and the audio output terminal of the input terminal 21 on the 0 side. Then, the video reproduction is started after the receiving unit 30 is mounted on the head and the earphones 33, 33 are mounted on both ears.

Then, as shown in the signal flow diagram of FIG.
The video signal and the audio signal generated by the video deck D are input to the video / audio signal transmission unit 20a via the cable. In the video / audio signal transmission unit 20a, first, the modulation circuit 20a1 uses the UHF band 500
After being converted to an RF signal in the vicinity of MHz, the amplifier circuit 20a2
, And then transmits via the transmitting antenna 20a3. The RF signal transmitted in this manner is received via the receiving antenna 30a1 of the video / audio signal receiving unit 30a and the tuning circuit 30a2, and is frequency-converted into an intermediate frequency signal of video and audio by the IF circuit 30a3. And
The sound is detected by the sound detection and amplification circuit 30a4, and the frequency change is returned to the change in the amplitude of the sound.

On the other hand, for the image, the image detection and amplification circuit 3
After detecting the video at 0a6, the luminance / color signal processing circuit 30
The image is amplified at a7. Thereafter, in the luminance / color signal processing circuit 30a7, the input signal is separated into a luminance signal Y and a color signal.
Synchronous detection and demodulation are performed at the phases -Y and RY, and both are added at a predetermined ratio to generate GY. The demodulated BY signal, GY signal, RY signal and luminance signal Y are converted into primary color signals (R, G, B) by a matrix circuit (not shown).
After being converted to the
And output to the LCDs 32 and 32.
Output a reproduced image.

That is, the user can use the LCDs 32, 3 in front of the eyes.
2 and a video playback sound from the earphones 33 and 33, respectively. Further, since the video signal and the audio signal are spatially transmitted by radio waves, the movable range of the user is widened. Here, when the user operates the remote control R of the video deck D, the infrared remote control signal emitted from the remote control R is received by the infrared light receiving section 30b1 of the remote control signal transmission unit 30b. Then, the infrared remote control signal is FM-modulated by the modulation circuit 30b2 into a remote control signal of 70 MHz in the VHF band, and then amplified and transmitted by the amplification circuit 30b3.

Then, the remote control signal is transmitted to the remote control signal receiving antenna 20b of the remote control signal receiving unit 20b.
1 is received by the transmission unit 20 via the tuning circuit 20b2, and is demodulated by the demodulation circuit 20b3.
At 0b4, an infrared remote control signal is emitted. And
The infrared remote controller is received by the video deck D, and a process corresponding to the infrared remote controller signal is executed. As described above, by converting an infrared remote control signal into a radio wave, the remote control signal can be reached even when an obstacle such as a wall is present. For example, as shown in FIG. 5, when there are two rooms A and B separated by a wall, the video deck and the transmission unit 20 are arranged on the room A side, and the reception unit 30 is mounted. It is assumed that the user is in room B. In the figure, the infrared remote control signal is indicated by a dashed line, and the radio wave remote control signal is indicated by a dashed line.

Here, when the user operates the remote control R, the infrared remote control signal emitted from the remote control R cannot reach the video deck in the room A across the wall.
However, since the receiving unit 30 receives the infrared remote control signal, modulates the signal into radio waves, and transmits the signal, the remote control signal reaches the transmitting unit 20 in the room A across the wall. As described above, in the head display 10 including the video signal and audio signal transmission unit 20 and the reception unit 30 that receives and outputs the video signal and the audio signal, the video / audio signal transmission unit 20a on the transmission unit 20 side The video signal and the audio signal input from the VCR are converted into RF signals and transmitted, and the video / audio signal receiving unit 30a on the receiving unit 30 side receives the R signal.
Since the F signal is received, the video signal and the audio signal are demodulated and output to the LCDs 32 and 32 arranged in front of the user, and the audio is output to the earphones 33 and 33. Therefore, the receiving unit 20 is mounted. It is possible to provide a head display that can be freely moved with the head.

[Brief description of the drawings]

FIG. 1 is a perspective view of a head display according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an electrical connection of a transmission unit.

FIG. 3 is a block diagram illustrating electrical connection of a receiving unit.

FIG. 4 is a flowchart of a video signal, an audio signal, and a remote control signal.

FIG. 5 is an explanatory diagram for describing a specific example of a flow of a remote control signal.

FIG. 6 is a perspective view of a head display according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Head display 20 ... Transmission unit 20a ... Video / audio signal transmission unit 20a1 ... Modulation circuit 20a2 ... Amplification circuit 20a3 ... Transmission antenna 20b ... Remote control signal reception unit 20b1 ... Remote control signal reception antenna 20b2 ... Tuning circuit 20b3 ... Demodulation circuit 20b4 ... Infrared light emitting section 21 Input terminal 30 Receiving unit 30a Video / audio signal receiving unit 30a1 Receiving antenna 30a2 Tuning circuit 30a3 IF circuit 30a4 Audio detection and amplification circuit 30a5 Audio output circuit 30a6 Video detection and amplification circuit 30a7 Luminance / color signal processing circuit 30a8 video output circuit 30b remote control signal transmission unit 30b1 infrared receiving section 30b2 modulation circuit 30b3 amplification circuit 30b4 remote control signal transmission antenna 31 headset 32 ... LCD 33 ... earphone 34 ... casing

Claims (4)

[Claims] A transmitting unit for transmitting a video signal and an audio signal;
A head display including a receiving unit that receives and outputs the video signal and the audio signal, wherein the transmission unit includes a transmission unit that receives the video signal and the audio signal as input and transmits the video signal and the audio signal via a spatial transmission medium. A receiving unit for receiving a video signal and an audio signal transmitted by the transmitting means via the spatial transmission medium; anda receiving unit for transmitting an image in front of the eye based on the received video signal. A head display comprising: a video display means for displaying; and a sound reproducing means for reproducing sound at a position where the sound can be heard based on the received sound signal. 2. The head display according to claim 1, wherein the spatial transmission medium is a radio wave. 3. The head display according to claim 2, wherein the receiving means includes a receiving antenna formed in a loop around the user's head. 4. The head display according to claim 1, wherein the receiving unit transmits an infrared remote control signal via an electric wave, and an infrared remote control signal receiving unit that receives the infrared remote control signal. Remote control signal transmission means, wherein the transmission unit receives a remote control signal transmitted by radio waves from the remote control signal transmission means, and converts the received remote control signal into an infrared remote control signal. A head display comprising: an infrared remote control signal light emitting unit that emits light.