KR200304507Y1 - Head Mounted Display apparatus for video transmission by light fiber - Google Patents

Abstract

The present invention relates to an HMD device by optical image transmission. The purpose of the present invention is to separate a control device equipped with various electronic devices from a headset worn on the head, and to use an optical fiber to transmit a video signal from the control device to the headset. It reduces the weight and volume of the headset, avoids the effects of electromagnetic waves, and also uses a see-through method that allows you to look forward while looking at the screen. In providing a device.

The purpose of the present invention is to separate the video and audio signals output from the external video playback device, the audio signal is divided into the corresponding channel to output the audio through the speaker, the video signal to the left and right of the video in different fields HMD control means for separating and outputting alternately, left and right optical fiber condensing the left and right image output from the HMD control means, respectively, and delivered to the end, and each image transmitted through the left and right optical fiber It is characterized by consisting of a headset to display in front of the field of view.

Description

Head Mounted Display apparatus for video transmission by light fiber}

The present invention relates to a head mounted display (hereinafter, referred to as "HMD") device, and more particularly, an electronic control device for controlling video and audio signals transmitted from a video reproducing device is integrated into a portable device. And since the image is transmitted to the head wearing part through the optical fiber relates to an HMD device by the optical image transmission to improve the wearing comfort and to be not affected by electromagnetic waves by miniaturizing and lightweight the image display unit to be worn on the head.

Recently, various personal electronic products have appeared due to the development of electronic and multimedia technologies. As personal electronic products, various products such as video and audio reproducing devices, computers, and entertainment devices are appearing. In particular, as a personal display device, the user can enjoy a more realistic screen with the appearance of the HMD that can enjoy a larger screen while wearing on the head.

The HMD device shows an image displayed by a display device such as a liquid crystal display (LCD) or a CRT to a user by using a precise optical mechanism. Since the HMD has an image screen positioned very close to the eye, very precise optics are required to focus on a very short distance and to prevent eye fatigue.

1 is a block diagram of a stereoscopic image HMD device according to the prior art. This is a Republic of Korea Patent Registration No. 10-0226870 filed July 29, 1999, and will be described in detail with reference to this.

When the video signal in which the left and right screens are sequentially recorded on each field of the recording medium is input, a sync separation unit 40 for separating the sync of the video signal and the separated sync signal are inputted to the odd field. a field discrimination unit 42 for discriminating and outputting an odd field and an even field, a video signal processing unit 41 for processing the video signal output from the sync separation unit 40 to be displayed; An image display unit 46 comprising an LCD for displaying the video signal processed by the video signal processing unit 41, and two light sources 48 and 48 configured to face each other left and right around the image display unit 46; '), The first driver 43 for driving the image display unit 46, and the two light sources 48, 48' according to each field signal output from the field discriminating unit 42. Alternately drive them in synchronization with the synchronization signal The second driver 44 (45) for driving to display the image displayed on the image display unit 46 and the left and right inversion to prevent the image displayed on the image display unit 46 from appearing left and right reversed with each other The left and right signal inverting section 55 is configured. Reference numerals 49 and 49 'are semi-transparent mirrors, 47 and 47' are light absorbing plates for absorbing 50% of the light not transmitted through the semi-transparent mirror, and 50,50 'are the above-mentioned. It is an eyepiece which injects the observer's eyes 51 and 51 'by expanding the image light transmitted from the transflective mirror.

The HMD device according to the prior art configured as described above receives a sequentially recorded video signal, that is, a video signal in which left and right screens are sequentially recorded in each field, and separates the sync signal through the sync separator 40. .

The separated sync signal is input to the field discriminator 42 to output signals corresponding to the odd field and the even field. On the other hand, the video signal output from the sink separating unit 40 is input to the first drive unit 43 driving the image display unit 46 to display an image. At this time, the left and right images are sequentially displayed. Accordingly, the field discrimination signal determined by the field discrimination unit 42 synchronized with the left and right video signals is input to the left and right second driving units 44 and 45, respectively, and displayed on the image display unit 46. Flashes in synchronization with.

In addition, assuming that the image display unit 46 is an image display unit 46 having left and right image inversion functions, the synchronization signal is converted to the left and right inversion signals of the image display unit 40 at the same time that the image display unit 46 blinks and the first image is displayed. It is input to the drive part 43. The input of the left and right inversion signals prevents two images, i.e., left and right images, from being inverted with each other. At this time, if the image display unit 46 does not have a left and right image inversion function as described above, the left and right signal inversion unit 55 is provided to input an inversion signal to the first driving unit 43. Process it so that it can be reversed.

In the optical system for displaying an image signal, each image recorded in the odd field and the even field is transflected with each illumination light as the left and right light sources 48 and 48 'are alternately lit on the image display unit 46. The left and right eyes 51 and 51 'of the observer are irradiated through the mirrors 49 and 49', so that they are alternately seen. At this time, 50% of the light is transmitted through the semi-transparent mirrors 49 and 49 ', and the remaining 50% is reflected and absorbed by the light absorbing plates 47 and 47'.

In this way, the video signal reproduced through the recording medium is irradiated to the left and right eyes through the left and right transflective mirrors and the left and right lenses in each driving unit, thereby enabling to enjoy a three-dimensional stereoscopic image.

However, such a prior art has the advantage of displaying a three-dimensional stereoscopic image using one image display means, but processes each of the above-mentioned electronic devices to process the video signal reproduced on the recording medium and visually recognize it. By attaching various mirrors and lenses to the headset, the weight and volume of the headset are increased, thereby reducing the wearing comfort. In addition, there is a problem that the electromagnetic waves generated from various electronic devices adversely affect the human body.

The present invention is to solve the above problems of the prior art, the purpose is to separate the control device equipped with various electronic devices from the HMD device with the headset wearing on the head, and the image from the control device to the headset using the optical fiber Signal transmission reduces weight and volume of the headset, avoids the effects of electromagnetic waves, and reduces the burden even when worn for a long time by applying a see-through method that looks forward while looking at the screen. The present invention provides an HMD device by optical image transmission.

1 is a schematic configuration diagram of an HMD device according to the prior art,

2 is a schematic configuration diagram of an HMD device by optical image transmission according to the present invention,

3 is a detailed block diagram of an HMD device by optical image transmission according to the present invention;

4 is a graph showing an immersion analysis value per hour of the see-through method.

<Description of Symbols for Major Parts of Drawings>

100: external video playback device 112: television tuner

200: HMD controller 201: external video connection terminal

202: signal selection unit 203: keypad

204: signal processing unit 206: input / output unit

208: frame buffer 210: audio signal driver

212: 3D voice drive unit 214, 216: left and right voice drive unit

220: image driver 221: LCD driver

222: LED driver 223: LED

224: LCD 226: Image condenser

300: optical fiber 302: image irradiation unit

400: headset 402: HOE

510, 520: Earphone

The HMD device by the optical image transmission according to the present invention for achieving the object of the present invention is a HMD device for displaying the image output from the external image playback device in the virtual screen on the front of the field, the output from the external image playback device HMD control means for separating the video and audio signals respectively, the audio signal is divided into the corresponding channel and the audio output through the speaker, and the video signal is alternately outputting the video of the different fields to the left and right, and the HMD control A left / right optical fiber for condensing the left / right images output from the means and transmitting the left / right images to the ends thereof, and a headset for displaying each image transmitted through the left / right optical fibers in front of the field of view. .

2 is a schematic block diagram of an HMD device by optical image transmission according to an embodiment of the present invention, which is a DVD player (Digital Video Display player) 102, a video cassette player (VCR) 104, a camcorder ( 06) separates the video and audio signals output from the external video playback device 100, including the game player 108, personal computer (PC) 110, and the external video playback device 100, respectively, The HMD control device 200 and the HMD control device 200 for outputting audio through the earphones 510 and 520, and separating and displaying the video signals of the different fields by alternately displaying the left and right images. Holographic optical element (Holographic Optical Element) for condensing the left / right image output from the) and the left / right optical fiber 300 to transmit to the end, respectively, and each image transmitted through the left / right optical fiber 300 Display hereafter referred to as " HOE " It consists of a headset 400 that.

Here, the HMD controller 200 is separated from the headset 400 and fixed in a separate case, and the image is transmitted to the headset 400 through the optical fiber 300. As shown in FIG. 3, the detailed configuration of the HMD control apparatus 200 may include any one of video and audio signals output from the plurality of external video reproducing apparatuses 102 to 110 and the television tuner 112 according to user selection. The signal selector 202 for selecting and inputting separates the video and audio signals transmitted from the signal selector 202, and outputs the luminance signal and the chromaticity signal of the video signal separately, and different images according to the synchronization signal. A signal processor 204 for separating and outputting field signals, and a voice signal driver and a 3D voice driver for driving a speaker of each channel by driving the audio signal output from the signal processor 204 three-dimensionally. 210 and 212 and an image driver 220 for separately driving the image signals left and right according to the luminance signal and the chromaticity signal, respectively, from the image field signals output from the signal processor 210 and 212; Video sphere And a video output unit 221, 222, 224 for displaying the left and right video signals output from the eastern part 220, respectively.

On the other hand, the image output unit 221, 222, 224 LED to drive the LED 223 of the corresponding color (RGB) to adjust the color by the left / right color signal (C) output from the image driver 220 An LCD driver 221 for driving the corresponding LCD 224 to adjust respective luminance by the driver 222 and the luminance signal Y output from the image driver 220, an LED driver 222, and an LCD driver And an image condenser 226 for condensing an image implemented by the control of 224 and transmitting the image to the optical fiber 300.

The LED driver 222, the LCD driver 221, the LED driver 222, the LED 223, the LCD 224, and the optical fiber 300 are configured in the same manner as a pair for implementing left and right images, respectively. .

Referring to Figures 2 to 4 attached to the operation according to the embodiment of the present invention configured as described in more detail as follows.

First, the external video reproducing apparatus 100 is connected to the input terminal 202 of the HMD control apparatus 200. Here, the external image reproducing apparatus 100 is an IMT-2000 not shown in the drawings other than the DVD player 102, the VCR 104, the camcorder 106, the game player 108, and the PC 110 shown in FIG. , Other video phones and the like.

On the other hand, the television tuner 112 is included in the case of the HMD control apparatus 200, so that it is possible to watch television broadcasts without having a separate television.

When the user selects one of the external video playback apparatuses 102 to 112 using the selection keypad 203 attached to the outside of the HMD control apparatus 200, the video and audio data reproduced by the external video playback apparatus is selected. Is input to the HMD control apparatus 200 through the external video connection terminal 201.

The video and audio data input to the HMD controller 200 are transmitted to the signal processor 204 through the signal selector 202. The signal processor 204 separates the input data into video data and audio data.

The voice data separated and output from the signal processor 204 is driven and amplified into three-dimensional voice through the voice signal driver 210, the 3D voice driver 212, and the left and right voice drivers 214 and 216. Voice is output through the right ear earphones 510 and 520.

On the other hand, the image data is driven to output the image signal through the image driver 220, in this case, the left and right screens are alternately output to implement a stereoscopic image.

To this end, the frame buffer 208 stores and outputs alternately output left and right frame images according to field synchronization signals.

The image driver 220 receives the luminance signals Y and the color signals C of the left and right frames output from the signal processor 220 to implement an image. That is, the color signal output from the image driver 220 is input to the LED driver 222 to drive the corresponding LED RGB. Meanwhile, the LCD driver 221 drives the LCD 224 by receiving the luminance signal output from the image driver 220.

As such, the image implemented by driving the LED 223 and the LCD 224 is collected by the image condenser 226 composed of convex lenses, and then the image is transmitted to the headset 400 through the optical fiber 300. .

It is displayed on the HOE 402 of the headset 400 through the image irradiator 302 composed of the convex lens provided at the end of the optical fiber 300. The image displayed on the HOE 402 is magnified and recognized through the retina of the naked eye 602.

The LCD driver 221, the LED driver 222, the LED 223, and the LCD for processing the respective color signals and luminance signals output from the image driver 221 and displaying the output image on the HOE 402. 224, the image condenser 226, the optical fiber 300, the image irradiator 302, and the HOE 402 are configured in pairs so as to be visible to the left and right naked eyes 602, respectively, and their functions are the same. However, the respective parts are operated to sequentially display the left and right HOE 402 to implement a stereoscopic image.

In this case, when the image is irradiated to the HOE 402, the image is visible to the naked eye 602, but when the image is not irradiated, the image is visible outside the HOE 402. This method is referred to as a see-through method, and FIG. 4 shows each time using a see-through HMD, an HMD with no visible field of view, and a general television or monitor. It is a comparison showing the immersion according to.

Here, as shown in the graph shown, using the see-through HMD (A) can be seen that the immersion is relatively higher than the case of using a HMD (b) or a general television or monitor (c) that is blocked front view. . As a result, the higher the immersion feeling, the lower the eye fatigue even after long use.

As described above, the HMD device by the optical image transmission according to the present invention is to separate the HMD control device and the headset and transmit the video signal from the HMD control device to the headset using the optical fiber can reduce the weight and volume of the headset Wearing is excellent, and since the headset does not include an electronic device, it can be avoided from the effects of electromagnetic waves, and the see-through method for looking forward while looking at the screen increases the screen immersion and accordingly, Also has an effect that can reduce the eye fatigue.

Claims (1)

HMD control means for separating the video and audio signals output from the external video playback device, the audio signal is separated into the corresponding channel and the audio output, and the video signal is alternately outputting the video of the different fields to the left / right, and the A left / right optical fiber for condensing left and right images from the HMD control unit and transmitting the left and right images to the ends thereof, and a headset for displaying each image transmitted through the left and right optical fibers in front of the field of view. In The HMD control means comprises a signal selection means, a signal processing means, an audio signal driving means, an image driving means, and an image output means, wherein the HMD control means is fixed in one case separately from the headset, and outside the case. Including a keypad, an external video connection terminal and an optical fiber connection terminal, The signal selection means selects and inputs any one of video and audio signals output from a plurality of external video playback apparatuses and television tuners according to user selection; The signal processing means separately outputs the luminance signal and the chroma signal of the image signal transmitted from the signal selection means, separates and outputs different image field signals according to the synchronization signal, and temporarily pauses the image frame of each separated field. Frame buffer for storing and outputting; And input / output means for transmitting a user selection signal input through the keypad to the signal processing means. The voice signal driving means drives the speaker of each channel by driving the audio signal output from the signal processing means three-dimensionally and outputs voice; The image driving means separately drives the image signal to the left / right side according to the luminance signal and the chromaticity signal for each of the different image field signals output from the signal processing means; The image output means may include left / right LED driving means for driving a corresponding LED to adjust a color by a left / right color signal output from the image driving means; Left and right LCD driving means for driving the corresponding LCD to adjust the respective luminance by the luminance signal outputted from the image driving means; And left and right image condensing means for condensing each image implemented by the control of the LED driving means and the LCD driving means and transmitting the image to the optical fiber. And an image enlargement means, in addition to the optical fiber, positioned at an end of irradiating the image to the headset to enlarge and disperse the transmitted image on the inner surface of the headset; The headset is HMD device by the optical image transmission, characterized in that the see through the optical fiber and the front through the outside of the headset can be seen in the see-through method.