KR20170003892A - wearable display for the low vision - Google Patents

Abstract

The present invention relates to a wearable display for people with low vision. More specifically, the present invention relates to a head-mount display device capable of controlling a focus position of a display image by controlling a gap between the display and an optical system including a lens for people with low vision. The wearable display for people with low vision includes: a head-mount display comprising an optical module delivering an image light, emitted from at least one display, to the eyes of a user; a first camera obtaining content by photographing; and a control part controlling the head-mount display to output the obtained content. The control part is able to control the obtained content to vividly display the content to the user by adjusting a focus on retinas of the eyes of the user by changing a position of the display.

Description

[0001] Wearable display for the low vision [0002]

The present invention relates to a wearable display for low vision. More specifically, the present invention relates to a head mount display device capable of adjusting a focus position of a display image through adjustment of an interval between an optical system including a lens for low vision and a display.

2. Description of the Related Art Generally, an image display device forms a focal point so that a virtual large-sized screen can be formed at a long distance by using a precision optical device, which is generated in a position very close to an eye, so that a user can view an enlarged virtual image An image display device.

In addition, the image display device is configured to include a see-close type in which only the image light emitted from the display device can not be seen in the surrounding environment, and a see-close mode in which the image light emitted from the display device (See-through) that can be seen.

Head-mounted display (HMD) refers to various digital devices that can be worn on the head like glasses to receive multimedia contents. Various wearable computers (Wearable Computers) have been developed in accordance with the trend of weight reduction and miniaturization of digital devices, and HMDs are also widely used. The HMD can be combined with augmented reality technology, N screen technology, etc., beyond the simple display function, to provide various convenience to the user.

For example, when a microphone and a speaker are mounted on the HMD, the user can perform a telephone conversation while wearing the HMD. Further, for example, when a camera is mounted on the HMD, the user can capture an image of a desired direction in a state in which the HMD is worn.

On the other hand, in the case of low visibility, there is a problem that it is difficult to receive contents due to a visual problem even when a head-mounted display (HMD) is worn.

Korean Patent Application Publication No. 20-2012-0001640

Disclosure of Invention Technical Problem [8] The present invention has been made to overcome the above-mentioned problems, and a wearable display for a low vision device is proposed.

Specifically, the present invention proposes a head mount display device capable of adjusting a focus position of a display image by adjusting an interval between an optical system including a lens and a display for low vision.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A wearable display for low visibility according to an embodiment of the present invention for realizing the above-mentioned problems includes a head mount display comprising an optical module for transmitting image light emitted from at least one display to a user's eyeball; A first camera for capturing and acquiring contents; And a control unit for controlling the head mounted display to output the obtained content, wherein the control unit adjusts a focus of the at least one display to be focused on the retina of the user's eyeball, So that one content can be clearly output to the user.

The head mount display may further include a second camera for capturing and acquiring the content.

If the distance between the content to be acquired and the user is within a predetermined range, the control unit controls the first camera and the second camera among the first camera and the second camera, Capturing and acquiring the content using a camera, and when the content exceeds the predetermined range, the control unit can photograph and acquire the content using the second camera among the first camera and the second camera.

In addition, the first camera and the second camera may be adjustable in angle according to the control of the control unit, and zoom in or zoom out may be possible.

In addition, the first camera or the second camera photographs a desired area of the object through the angle adjustment, acquires an enlarged image of the area through the zoom-in operation, The information displayed on the screen may be identifiable.

The first camera may be implemented as a mouse or a handheld scanner.

According to another aspect of the present invention, there is provided a display method for a low visor, comprising: transmitting image light emitted from at least one display through a head mount display to a user's eyeball; Capturing and acquiring contents; Outputting the acquired content to the head mount display; And controlling the focus of the at least one display to be focused on the retina of the user's eyeball so that the obtained content is clearly output to the user.

The present invention can provide a wearable display for a low vision user to a user. Specifically, the present invention can provide a head mount display device capable of adjusting a focus position of a display image through adjustment of an interval between an optical system including a lens for low vision and a display.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
1 shows an example of a block diagram of a head-mounted display (HMD) according to the present invention.
2 is a diagram showing an embodiment of an HMD related to the present invention.
3A and 3B are diagrams illustrating rotation compensation of a second body of the HMD of the present invention.
4A to 4C are views showing rotation compensation of the first body of the HMD of the present invention.
5 is a view showing a control method of the HMD of the present invention.
6 is a cross-sectional view schematically illustrating a concept of a conventional head-mounted display device in which an external image and a virtual screen are simultaneously provided to realize an augmented reality.
FIG. 7 illustrates a specific example of a Google Glass located at the upper part of the user's eye to minimize visual disturbance in connection with the present invention.
8 is a side view schematically illustrating the concept of a head mount display having a goggle negative rotation structure according to the present invention.
Fig. 9 shows an example of a block diagram of a wearable display for a low vision device proposed by the present invention.
Fig. 10 shows a specific example of the wearable display for low visibility use described in Fig.
11 is a view for explaining the adjustment of the focus position of the display image through adjustment of the gap between the optical system including the lens for low visibility and the display in the present invention.
12 is a diagram for further illustrating that the focus position of a display image is adjusted by adjusting the gap between an optical system including a lens for low visibility and a display in the present invention.
13 is a view for further illustrating that the focus position of a display image is adjusted by adjusting the gap between an optical system including a lens for low visibility and a display in the present invention.
FIG. 14 is a flowchart illustrating a process of providing contents to a user using a wearable display for low visibility.
FIG. 15 is another example of a process of providing content to a user using a wearable display for a low vision by a flowchart.

Generally, the image display device forms a focus so that a virtual large screen can be formed at a close distance in front of the eye using a precise optical device, And the like.

In other words, a general image display device can not see the surrounding environment, but can be closed (see-close) in which only the image light emitted from the display device can be seen, and the image light emitted from the display device (See-through).

First, an image display apparatus will be described in detail with reference to the drawings.

As used herein, the term " general < RTI ID = 0.0 > commonly used < / RTI > term is selected with consideration given to the function according to an embodiment, but this may vary depending on the intention or custom of the person skilled in the art or the emergence of a new technique. In addition, in certain cases, there may be a term arbitrarily selected by the applicant, in which case the meaning thereof will be described in the description of the corresponding invention. Therefore, it is intended that the terminology used herein should be interpreted based on the meaning of the term rather than on the name of the term, and on the entire contents of the specification.

Furthermore, although the embodiments are described in detail below with reference to the accompanying drawings and the accompanying drawings, the present invention is not limited to or limited by the embodiments.

1 is a block diagram of a head-mounted display (HMD) of the present disclosure. However, FIG. 1 illustrates an embodiment in which some configuration modules may be deleted or a new configuration module may be added according to the needs of those skilled in the art.

1, an HMD 100 according to one embodiment may include a display unit 110, a communication unit 120, a sensing unit 130, a camera unit 140, a processor 150, have.

Meanwhile, the HMD 100 may include a first body and a second body. The first body corresponds to the body of the HMD 100 and may include a display unit 110, a first communication unit, a first angle sensing unit, a processor 150, and the like. The second body may be a body detachable from the body of the HMD 100, and may include a second angle sensing unit, a camera unit 140, a second communication unit, and the like. The above-described first body and second body are, as one embodiment, capable of changing some of the constituent units or adding new constituent units to the first body and the second body, as required by those skilled in the art.

The first body and the second body will be described again in Fig.

The display unit 110 may display visual information. Here, the visual information may include contents, applications, images, moving pictures, and the like. In addition, the display unit 110 can output visual information to the screen based on the control command of the processor 150. [ In this specification, the display unit 110 may be included in the first body of the HMD 100.

Meanwhile, in the present specification, the HMD 100 can output an image to a display screen in various ways. As an example, the HMD 100 may output an image in a see-through manner. Here, the see-through method is a method in which the display screen is transparent and the user can use the contents while recognizing the surrounding environment while wearing the HMD 100. As another example, the HMD 100 may output an image in a front-light manner. Here, the forward scanning method represents a method of displaying a reflected image through a reflector such as a mirror without projecting the light directly onto the eye.

Also, as another example, the HMD 100 may output an image in a see-closed manner. Here, the dark type method can not view the external environment through the display screen, and shows the manner of using the contents through the display screen. In this specification, it is assumed that the HMD 100 displays an image in a perspective type or a forward scanning manner.

The communication unit 120 can communicate with an external device and transmit / receive data using various protocols. Further, the communication unit 120 can be connected to a network by wire or wireless, and can transmit / receive digital data such as contents. For example, the communication unit may be a WLAN (Wi-Fi), a Wibro (wireless broadband), a Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access Specifications and the like can be used.

In this specification, the communication unit 120 may include a first communication unit and a second communication unit. As described above, the first communication unit may be provided in the first body, and the second communication unit may be provided in the second body. For example, the first communication unit and the second communication unit may include a first communication unit

Receive signals from the processor 150, and transmit / receive signals from the camera unit 140 included in the second body.

The sensing unit 130 senses the surrounding environment of the HMD 100 using at least one sensor mounted on the HMD 100 and can transmit the sensing data to the processor 150 in the form of a signal.

The sensing unit 130 may include at least one sensing means. In one embodiment, the at least one sensing means includes at least one sensor selected from the group consisting of a gravity sensor, a geomagnetism sensor, a motion sensor, a gyroscope sensor, an acceleration sensor, an infrared sensor, an inclination sensor, a brightness sensor, A sensor, a depth sensor, a pressure sensor, a banding sensor, an audio sensor, a video sensor, a global positioning system (GPS) sensor, a touch sensor, and a grip sensor.

The sensing unit 130 collectively refers to the various sensing means described above. The sensing unit 130 senses the various inputs of the user and the environment of the HMD 100, and transmits the sensing result so that the processor 150 can perform the operation . The above-described sensors may be included in the HMD 100 as separate elements or integrated into at least one element.

In this specification, the sensing unit 130 may include an angle sensing unit 131 and an input sensing unit 132. In addition, the angle sensing unit 131 and the input sensing unit 132 may be provided in the first body and the second body, respectively. For example, the angle sensing unit of the first body may sense the rotation angle of the first body, and the input sensing unit of the first body may detect the input signal of the user to the first body have. In addition, for example, the angle sensing unit provided on the second body may sense the rotation angle of the second body, and the input sensing unit provided on the second body may detect a user's input signal with respect to the second body, can do. Also, a separation signal and a mounting signal between the first body and the second body can be detected through various sensing means provided on the first body and the second body. Also, the image capturing signal can be detected through the input sensing unit provided in the first body or the second body.

The camera unit 140 can take an image. More specifically, the camera unit 140 can take an image in the forward direction. Here, the front direction may correspond to the direction in which the camera unit 140 is oriented. In addition, the camera unit 140 may sense the image within the field of view area and provide it to the processor 150. Here, the angle of view field represents the range of horizontal and vertical viewing angles that can be included in a certain screen when sensing an image.

In this specification, the camera unit 140 may be included in the second body. Meanwhile, in this specification, the camera unit 140 may be provided not only to the second body but also to the first body. The camera unit 140 included in the second body may be mounted on the first body to sense an image. In addition, the camera unit 140 included in the second body may be separated from the first body to sense the image.

The processor 150 may process data, control each unit of the HMD 100 described above, and control data transmission / reception between the units. In this specification, the processor 150 may be included in the first body. For example, the processor 150 may include a display unit 110 included in the first body, a first angle sensing unit, a first communication unit, a camera unit 140 included in the second body, The sensor unit 130, and the second angle sensing unit. Meanwhile, the processor 150 may be provided separately from the first body as well as the second body.

In the present specification, when the second body is separated from the first body, the processor 150 can obtain the first rotation angle and the second rotation angle. In addition, the processor 150 may display a separate image preview interface that displays an image obtained by performing a first rotation compensation on the sensed image based on the second rotation angle. In addition, the processor 150 may detect the first capturing signal. The processor 150 may also capture the sensed image and store the captured image a second rotationally compensated image based on the first rotational angle and the second rotational angle.

In one embodiment of the present disclosure, the operations performed by the HMD 100 may be controlled by the processor 150. For convenience, the drawings and the following description are collectively referred to as being performed / controlled by the HMD 100.

1, the HMD 100 may include a power unit, a storage unit, an audio unit, and the like.

The power unit may supply power to the HMD 100 as a power source connected to an internal battery of the HMD 100 or an external power source. In addition, the storage unit can store various digital data such as audio, pictures, movies, and applications. The storage unit may represent various digital data storage spaces such as a flash memory, a random access memory (RAM), and a solid state drive (SSD). Further, the audio unit can receive or output audio data through a microphone and a speaker.

The HMD 100 shown in FIG. 1 is a block diagram according to an embodiment, and the blocks separately displayed are logically distinguished from the elements of the HMD 100. FIG. Therefore, the elements of the HMD 100 described above can be mounted as one chip or a plurality of chips according to the design of the device.

2 is a diagram showing an embodiment of the HMD of the present specification. 2 (a) shows a state in which the second body 20 is separated from the first body 10 of the HMD 100, and FIG. 2 (b) 1 shows a state in which the second body 20 is mounted on the body 10;

As described above with reference to FIG. 1, the HMD 100 may include a first body 10 and a second body 20. The first body 10 may correspond to the main body of the HMD 100 and the second body 20 may correspond to the sub body of the HMD 100. [

In this specification, the first body 10 may include a display unit, a first communication unit, a first sensing unit, a processor, and the like. However, the first body 10 may further include a camera unit or the like. Also, in this specification, the second body 20 may include a camera unit, a second communication unit, a second sensing unit, and the like. However, the second body 20 may further include a processor that operates separately from the processor of the first body 10.

2, the second body 20 is detachably mountable to the first body 10. Accordingly, the camera unit included in the second body 20 can be mounted on or separated from the first body 10 to sense images at various angles. Meanwhile, the first body 10 and the second body 20 can be separately mounted through various methods. For example, the first body 10 and the second body 20 may be separately mounted on the first body 10 and the second body 20, have. In addition, for example, the first body 10 or the second body 20 may be configured to have a bonding structure so that the first body 10 or the second body 20 can be easily separated and mounted.

3 is a diagram illustrating rotation compensation of a second body of the HMD of the present disclosure; More specifically, FIG. 3A shows the rotation of the second body 20, and FIG. 3B shows the rotation compensation according to the rotation of the second body 20.

3A, the second body 20 may be separated from the first body and rotated to the right by an angle a. In this case, the image sensor 21 of the camera unit included in the second body 20 may be rotated to the right by an angle a, as shown in the first diagram of FIG. 3B. Accordingly, the HMD 100 can sense the image rotated to the right by the angle a in the horizontal state shown by the image sensor 21 through the camera unit.

Through this, the HMD 100 can obtain the sensed image 21 as shown in the second figure of FIG. 3B. In this case, since the horizontal line of the sensed image 21 is rotated by the angle -a, the HMD 100 can perform the rotation compensation of the sensed image for the horizontal image. More specifically, the HMD 100 may perform rotation compensation to rotate the sensed image 21 to the right by an angle a. At this time, the HMD 100 may crop (22) the sensed image based on the aspect ratio of the frame of the camera unit for horizontal correction. For example, the aspect ratio of the frame of the camera unit may correspond to 3: 2. In addition, the rotation compensated and cropped image 22 corresponds to the horizontally corrected image of the image sensed by the camera unit.

The above-described rotation compensation and cropping are performed in consideration of the rotation angle of the camera unit, and generally correspond to a method of performing rotation compensation of a camera. However, in this specification, it is assumed that rotation compensation is performed in consideration of not only the rotation angle of the camera unit but also the rotation angle of the HMD 100 worn by the user. Accordingly, the case where the rotation compensation of the first body including the camera unit is performed will be described with reference to FIG.

4 is a diagram illustrating rotation compensation of a first body of the HMD of the present disclosure; 4A shows the rotation of the first body 10, Fig. 4B shows the image displayed according to the rotation of the first body 10, Fig. 4C shows the rotation of the first body 10, Fig.

First, as shown in the first drawing of FIG. 4B, when the user wearing the HMD 100 is in a horizontal state, the display unit 110 and the image preview interface 30 may be in a horizontal state. Here, the image displayed on the image preview interface 30 corresponds to the image on which the rotation compensation and the cropping of the sensed image in FIG. 3 described above are performed.

Meanwhile, as shown in FIG. 4A, the HMD 100 may be rotated to the right by an angle b. More specifically, the HMD 100 may be in a state in which the first body 10 worn by the user is rotated to the right by an angle b regardless of the rotation angle of the second body.

In this case, the display unit 110 of the HMD 100 corresponds to a state rotated to the right by an angle b, as shown in the second drawing of FIG. 4B. In this case, the HMD 100 can rotate the image preview interface 30 to the right by the angle b. Therefore, even if the HMD 100 rotates, the user can be provided with the image displayed on the image preview interface 30 while maintaining the horizontal state.

At this time, the HMD 100 may detect an image capturing signal. In this case, as shown in FIG. 4C, the HMD 100 can capture the image with the image 22 displayed on the image preview interface 30 rotated to the right by an angle b. That is, the captured image 23 may correspond to an image rotated to the right by an angle b. More specifically, the captured image 23 is rotated to the right by an angle b, corresponding to an image cropped to fit the aspect ratio of the frame. Accordingly, it is possible to photograph and store an oblique image according to the motion of the HMD worn by the user.

5 is a diagram showing a control method of the HMD of the present specification. More specifically, FIG. 5 shows a case where an image is captured using a second body 20 separated from the first body 10 of the HMD 100.

The HMD 100 can activate the camera interface when the second body 20 is separated from the first body 10. [

That is, the HMD 100 can execute the camera application by detecting the separation signal of the second body 20 from the first body 10. However, the camera interface can be activated in various other ways.

When the camera interface is activated, the HMD 100 can display the image preview interface 30 on the display unit 110. [ The image preview interface 30 may display an image to be sensed through a camera unit included in the second body 20. 5, since the camera unit is in a horizontal state, the HMD 100 can display a horizontal image sensed through the camera unit in the image preview interface 30. [ Here, a horizontal image represents an image in which a horizontal line such as a horizontal line or a horizon line inside the image is maintained in a horizontal state.

In addition to the image preview interface 30, in the case of the perspective type HMD, the external environment visible to the user 1 can be seen in the display unit 110 as it is. On the other hand, when the angle of view of the camera unit tends to be wider than the angle of view of the eyes of the user 1, as shown in Fig. 5, an image having a wide angle of view in the image preview interface 30 Can be displayed.

Through the embodiment of FIG. 5, the user 1 can capture the image displayed on the image preview interface 30 while holding the second body 20. In this case, since the first body 10 and the second body 20 are in a horizontal state, separate rotation compensation for the captured image may be unnecessary.

Meanwhile, FIG. 6 shows an example of a conventional transmissive image display device.

6 includes a display device 10 for emitting image light, a polarized light separator 11 for reflecting only specific polarized light out of the light emitted from the microdisplay panel 10, A phase delay plate 12 for converting the linearly polarized light reflected by the polarized light separator into circularly polarized light or changing incident circularly polarized light to linearly polarized light and a circularly polarized light having passed through the phase delay plate 12 A semitransparent concave reflector 13 to be sent to the phase delay plate 12 and an optical opening and closing switch panel 14 attached to the outer surface of the transflective concave reflector so as to be able to open and close the ambient light, Optical system.

6, the image light generated by the display device 10 is converted into a P-wave or S-polarized light in the 90-degree direction by the polarized light separator 11 arranged at an angle of 45 degrees with respect to the display device 10 Only a 50% beam of a wave property is transmitted or reflected to arrive at the phase delay plate 12.

In addition, the image light that has been linearly polarized in the phase delay plate 12 is converted into circularly polarized light, reaches the transflective concave reflector 13, is reflected, becomes a circularly polarized light state whose rotation direction is opposite to that of the phase delay plate 12, The user can see the image enlarged by the transflective concave reflector 13 by reaching the user's eyes through the polarized light separator 11 again.

FIG. 7 illustrates a specific example of a Google Glass located at the upper part of the user's eye to minimize visual disturbance in connection with the present invention.

Referring to FIG. 7, the virtual screen is disposed at the upper part of the user's gaze axis and is provided to the user with a slope (A), and the external image is parallel to the user's horizontal axis of vision. In this case, the virtual image A can be confirmed by raising the eye upward, and the external image B can be confirmed without disturbing the forward view when gazing at the front.

8 is a schematic view of a head mount display device having a goggle negative rotation structure according to the present invention. The head mount display device having the goggle negative rotation structure includes one goggle module 30, one hinge module 31, A single controller module 32, and a single frame 33. As shown in Fig.

8, the goggle module 30 for providing a virtual screen A to a user is disposed at a position perpendicular to the center horizontal direction of the eye 34 of the user and separated from the controller module 32 And is connected to the controller module 32 by the attached hinge module 31 and the controller module 32 is firmly attached to the frame 33 so as not to move.

Here, the goggle module 30 may be either a see-through optical module for an augmented reality or a see-closed optical module providing only a virtual screen, and any method may be used. In the present invention, A user may view the virtual screen A provided through the light emitting surface 301 through the optical guiding method of the optical module 30 and the virtual screen A provided through the light emitting surface of the optical module 31 It is possible to simultaneously view the external image B transmitted through the emitting surface 301 and transmitted to the user.

On the other hand, in the case of low visibility, there is a problem that it is difficult to receive contents due to a visual problem even when a head-mounted display (HMD) is worn.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a wearable display for a low vision device. Specifically, the present invention proposes a head mount display device capable of adjusting a focus position of a display image by adjusting an interval between an optical system including a lens and a display for low vision.

For convenience of explanation, the head mount display described above with reference to the drawings is referred to as 100 and the entire wearable display is referred to as 1000. [

Fig. 9 shows an example of a block diagram of a wearable display for a low vision device proposed by the present invention.

Referring to FIG. 9, the wearable display 1000 for low vision may include a head mount display 100, a scanner 200, and a controller 300. However, this configuration is only exemplary of the present invention, and is applicable to the case where the functions of the present invention can be realized through more configurations or fewer configurations.

First, the head mount display 100 has been described above with reference to FIGS. 1 to 8, and a description thereof will be omitted for the sake of simplification of the description.

Next, the scanner 200 may include a camera 210 and a scroll control 220.

The scanner 200 is an apparatus for acquiring content information from outside, and the content information may include text, image, and moving picture information.

A camera 210 is used as a mechanism for acquiring such content information.

The camera 210 may capture text, images, and moving images. More specifically, the camera 210 can take an image in the forward direction. Here, the front direction may correspond to the direction in which the camera 210 is directed. In addition, the camera 210 may sense the image within the angle of view area and provide the sensed image to the control unit 300. Here, the angle of view field represents the range of horizontal and vertical viewing angles that can be included in a certain screen when sensing an image.

In addition, a scroll control 220 may be used to control the operation of this camera 210. [

The scroll control 220 corresponds to an input unit that can adjust the illuminance, the degree of zoom, and the like of the camera 210 through a user's operation.

In addition, the controller 300 controls the overall operation of the scanner 200 and the head mount display 100.

The control unit 300 described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the control unit 300 described herein may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) arrays, processors, controllers, micro-controllers, microprocessors, and other units for performing other functions.

On the other hand, when the information obtained to be displayed on the head mount display 100 is at a remote location, it may be acquired through the camera unit 120 provided in the head mount display 100, not the camera 210. [

Fig. 10 shows a specific example of the wearable display for low visibility use described in Fig.

Referring to FIG. 10, when the camera 210 of the near vision scanner 200 is used to view a book or a newspaper, and a bus number or blackboard type is checked, a camera unit (120) can be used.

In addition, the camera 210 of the scanner 200 and the camera unit 120 of the head-mounted display 100 for a long distance can incorporate a function of zooming 2 to 50 times and an autofocusing function.

Here, the camera 210 of the scanner 200 may be implemented as a mouse and a handheld scanner, and may be connected by wireless communication or wired communication.

The wireless communication used herein may be classified into short-range communication or long-distance communication.

The near field communication uses at least one of Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), and ZigBee technology, access, frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA).

On the other hand, the camera unit 120 provided in the head mount display 100 is mounted on the HMD, is adjustable in angle, and has a zoom control function.

As described above, the head mount display 100 is a form in which an enlarged image photographed by a camera can be worn by wearing glasses as in the case of a wearable display of a spectacles type, and includes both an HMD-built camera and a mouse- It is possible.

In the case where the head mount display 100 is a helmet type wearable display, the enlarged image photographed by the camera can be viewed as a spectacular display mounted integrally on the helmet, and includes both an HMD-built camera and a mouse- It is possible.

Next, a detailed process of adjusting the focus position of the display image through adjustment of the gap between the optical system including the lens and the display for low visibility, proposed by the present invention, will be described with reference to the drawings.

11 is a view for explaining the adjustment of the focus position of the display image through adjustment of the gap between the optical system including the lens for low visibility and the display in the present invention.

Referring to FIG. 11, the image focal length adjusting function is specifically described.

That is, the focus position of the hmd image can be adjusted through the adjustment of the distance between the optical system including the lens and the display.

There has been a problem that the focus of the image is not the same depending on the face shape and the difference in visual acuity of the individual.

However, when the function of the present invention is applied, a variable focus adjusting device capable of adjusting the distance between the microdisplay and the HMD optical system is provided, so that individual focus position adjustment (~ 10 cm ~ ~ 100 cm) is possible through microdisplay fine adjustment.

Also, as the Microdisplay position approaches, the focus position is pulled forward, so that the content for low vision can be displayed.

12 is a view for further illustrating that the focus position of the display image is adjusted by controlling the gap between the optical system including the lens and the display for low vision by the present invention.

12 (a) and 12 (b), a specific process is shown in which a focus displayed on the retina is adjusted according to a display position using a display focus adjusting device so that a blurred image can be clearly seen.

13 is a view for further illustrating adjustment of the focus position of the display image through adjustment of the gap between the optical system including the lens for low visibility and the display in the present invention.

Referring to FIG. 13, an hmd (100) equipped with an angle-controlled camera and a zoom lens system is shown.

In addition, you can shoot the desired position with the angle adjustment camera, and the enlarged image can be transmitted through hmd by the zoom function of the zoom lens.

13 shows an example in which the bus number is confirmed by photographing the bus and zooming in.

A description will be given of a process in which content is provided to a user using the wearable display 1000 for a low vision device based on the configuration of the present invention.

FIG. 14 is a flowchart illustrating a process of providing contents to a user using a wearable display for low visibility.

14, first, A step S110 of adjusting the illuminance and the zoom of the scanner camera for acquiring the content information using the scroll control is performed.

Thereafter, the step of acquiring external content information through the scanner (S120) proceeds.

In addition, the step S130 in which the content information is transmitted to the head mount display is performed, and the step of adjusting the focus of the retina according to the display position is performed through the focus adjustment device of the head mount display (S140).

Thereafter, step S150 of displaying the content information on the head-mounted display is performed, so that information can be efficiently transmitted even to the low vision persons.

Meanwhile, FIG. 15 is another example of a process of providing content to a user using a wearable display for low vision by a flowchart.

Referring to FIG. 15, first, the step of acquiring external content information at a distance via the camera of the head mount display (S210) is performed.

Thereafter, the step S220 in which the content information is transmitted to the head-mounted display is performed, and the focus of the retina is adjusted according to the display position through the focus adjusting device of the head-mounted display (S230).

Accordingly, step S240 of displaying the content information on the head-mounted display is performed, so that information can be efficiently transmitted even to low vision persons.

A head mount display device capable of providing a wearable display for a low vision device to a user through a configuration of the present invention and adjusting a focus position of a display image through adjustment of an interval between a display and an optical system including a lens for low vision, Can be provided.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet) .

In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers of the technical field to which the present invention belongs.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

Claims (1)

In a wearable display for low vision,
A first camera which is implemented in the form of a mouse or a handheld scanner to photograph a content including at least one of text, images and moving images to obtain a content image;
A head mounted display (HMD) comprising a first body and a second body detachably coupled to the first body; And
And a focus adjusting device for adjusting a focus according to the visual acuity of the user of the HMD,
Wherein the second body of the HMD comprises:
A second camera unit for photographing the content at a long distance to acquire a content image and
And a second angle sensing unit for sensing a rotation angle (a) rotated from a vertical line to the ground of the second camera unit,
Wherein the first body of the HMD comprises:
A mounting portion to which the second body is detached,
A display unit for displaying a content image acquired by the first camera and the second camera,
An optical system for providing a content image displayed on the display unit to a retina of an eyeball of a user of the HMD,
A first angle sensing unit for sensing a rotation angle (b) of rotation of the first body from a horizontal line relative to the ground;
(A) is detected in the second angle sensing unit, a region rotated by a compensation angle (-a) in accordance with the frame aspect ratio of the second camera unit with respect to the content image acquired by the second camera unit The display unit is cropped and displayed on the display unit,
Displaying an image preview interface on the display unit when the separation signal of the second body from the first body is sensed and displaying the content image acquired by the second camera unit on the image preview interface,
(B) is detected in the first angle sensing unit, an area displayed on the image preview interface is cropped by the rotation angle (b) in accordance with the frame aspect ratio of the second camera unit And a processor for causing the display unit to display the tilted image according to the rotation angle (b) of the first body,
Wherein the focus adjustment device comprises:
Wherein a focus of the user's eyeball is adjusted by changing a position of the display unit of the first body and adjusting a distance from the optical system to the retina of the eyeball of the user.

Images