KR20170002262U - See-through head mount display device - Google Patents

See-through head mount display device Download PDF

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Publication number
KR20170002262U
KR20170002262U KR2020150008290U KR20150008290U KR20170002262U KR 20170002262 U KR20170002262 U KR 20170002262U KR 2020150008290 U KR2020150008290 U KR 2020150008290U KR 20150008290 U KR20150008290 U KR 20150008290U KR 20170002262 U KR20170002262 U KR 20170002262U
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KR
South Korea
Prior art keywords
unit
head
image
head mount
light
Prior art date
Application number
KR2020150008290U
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Korean (ko)
Inventor
엄태상
Original Assignee
주식회사 쓰리에스솔루션
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Priority to KR2020150008290U priority Critical patent/KR20170002262U/en
Publication of KR20170002262U publication Critical patent/KR20170002262U/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1313—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B2027/0178—Eyeglass type

Abstract

The present invention relates to a head-mounted head-mounted display device which ensures a user's field of view at all times when worn on a head. The head-mounted head-mounted display device includes LEDs for outputting images, A head mount portion to be worn on the user's head; A black LCD unit mounted on the front of the head mount unit to provide on / off operation of the head mount unit and selectively providing light to the inside of the head mount unit; An optical module unit mounted in the head mount unit to direct an image of the LED and a light representing an external environment provided from the black LCD unit to the user's eyes; And a control unit electrically connected to the head mount unit and having an image input processing unit, a key operation unit, and a power supply unit and being connectable to various media devices to generate various types of video and audio signals, Mode, a cue-through mode, and an external environment viewing mode. According to the present invention, when an image viewing mode is selected by a user, an immersive image is viewed. In the cue-through mode, an external environment and an image can be simultaneously viewed. When an external environment viewing mode is selected, .

Figure P2020150008290

Description

SEE-THROUGH HEAD MOUNT DISPLAY DEVICE}

The present invention relates to a see-through head-mounted display device for ensuring a user's visual field at all times when needed even when worn on a head, and more particularly, to a head-mounted display device for a black LCD When the light is input from the black LCD, the external environment and the video image are overlapped and the cue-through function is possible. Depending on the user's choice, there are three modes of video viewing mode, To-head mounted display apparatus that is conveniently provided.

2. Description of the Related Art In general, a head mounted display (HMD) is an electronic device in which a controllable image signal is magnified through a lens and a mirror using an optical element such as a liquid crystal display (LCD) and a polarization filter.

Such a head-mounted display device has a very simple principle, and an optical system used therefor can be appropriately and variably arranged to realize a variety of functions. In order to secure an external view without releasing wear of a user, See-through functionality is typical.

As a related related art, Korean Patent Laid-Open Publication No. 1999-0048194 entitled " HMD of a cue-through function "is provided.

In such a conventional technique, the image-displayed optical image, which is polarized and filtered at a predetermined angle, is totally reflected by the transparent total reflection glass to eliminate the loss of light. When the shutter is opened in front of the total reflection glass by the user's operation, Through function of the head-on-a-lens (HMD) function by which an image is incident through the total reflection glass to ensure a clear front view of the head mounted device at all times.

Such conventional techniques include a back light emitting a light; A first polarizing filter for filtering only light components in a specific polarization direction that is 50% of the emitted light; A liquid crystal display for controlling the rotation of the polarization axis of the light component filtered by the first polarized light filter according to an input image signal; A second polarizing filter for filtering only a polarized component in a specified direction among output light of the liquid crystal display; A total reflection glass for totally reflecting the S-polarized light component incident on the incline at the Brewster's angle; An LCD shutter for selectively shielding external light; A concave lens for reducing the optical image incident from the opened LCD shutter; And an eyepiece lens for enlarging an optical image reflected or transmitted by the total reflection mirror, thereby reducing power consumption at the time of viewing an image and solving a heat generation problem, and an image is formed without loss of light incident from the outside Through function of a clear external image.

However, such a conventional technique is not only complicated in the structure of the optical module, but also does not provide a technique that allows a user to conveniently select and use any one of an image viewing mode, a cue-through mode, and an external environment viewing mode.

In another conventional technique, Korean Patent Registration No. 10-0995505 entitled " Stereoscopic Image Glasses "has been proposed.

Such conventional techniques include a right liquid crystal lens, a left liquid crystal lens, a tuned signal receiving unit, a control unit, and an oscillation circuit unit. The right liquid crystal lens and the left liquid crystal lens block or transmit light. For example, the liquid crystal lens transmits light when an operating voltage is supplied. The tuning signal receiving unit receives a tuning signal transmitted from the stereoscopic image display apparatus. And the control unit controls operations of the right liquid crystal lens and the left liquid crystal lens based on the tuning signal. The oscillation circuit part generates an oscillation signal having a frequency corresponding to the tuning signal. Wherein the control unit controls the operation of the right liquid crystal lens and the left liquid crystal lens based on the tuning signal when the tuning signal is a normal signal and controls the right liquid crystal lens and the left liquid crystal lens based on the oscillation signal when the tuning signal is an abnormal signal, And the operation of the left liquid crystal lens. For example, the control unit compares the tuning signal and the oscillation signal at regular intervals, selects the tuning signal when the tuning signal is a normal signal, and selects the oscillation signal when the tuning signal is an abnormal signal.

However, such a conventional technique does not provide a seed-through function that allows the user to see the external environment when worn.

Another conventional technique is proposed in Korean Patent Laid-Open Publication No. 10-2013-0139878 entitled " Opacity Filter for C-Thru Head Mount Display ".

This prior art incorporates a cue-through lens that combines light from a real-world scene with an augmented reality image, while an orifice filter is used to selectively block a portion of the real-world scene so that the augmented reality image appears more clearly do. The opacity filter may be, for example, a c-through LCD panel in which each pixel of the LCD panel can be selectively controlled to be transparent or opaque based on the size, shape and position of the augmented reality image. Eye tracking can be used to adjust the position of the augmented reality image and opaque pixels. The peripheral region of the a priori city filter that is not behind the augmented reality image may be activated to provide an augmented reality image representation or a peripheral signal. In another aspect, the opaque pixels are provided when the augmented reality image is not present.

However, such a conventional technique does not provide a user with a convenient technique to select and use three modes, namely, an image viewing mode, a cue-through mode, and an external environment viewing mode.

As another related technology, a "transparent seed-through display device" of Korean Patent Registration No. 10-1005466 has been proposed.

Such prior art techniques include a liquid crystal plate filled with liquid crystal; And a liquid crystal layer disposed on the upper surface and the lower surface of the liquid crystal plate and having a first alignment direction of the liquid crystal positioned on the upper surface of the liquid crystal plate and a second alignment direction of the liquid crystal positioned on the lower surface of the liquid crystal plate orthogonal to each other 1 orientation plate and a second orientation plate; The first and second alignment plates being stacked on the upper surface of the first alignment plate and the lower surface of the second alignment plate, respectively, and including a conductive material, wherein the first and second alignment directions are parallel to each other, A plate and a second conductive plate; A first transparent plate and a second transparent plate respectively laminated on the upper surface of the first conductive plate and the lower surface of the second conductive plate, respectively; Wherein each of the polarization axes is orthogonal to each other and light having a polarization state orthogonal to each polarization axis is absorbed and light having a parallel polarization state is transmitted through the first transparent plate and the second transparent plate, A first polarizing plate and a second polarizing plate; A transparent light guide plate which is positioned below the second polarizing plate and totally reflects the light incident from one side and outputs the light to the second polarizing plate and passes the background light incident thereunder to the second polarizing plate; And a light source that emits a light beam so that the optically transparent display device and the light source are provided with the transparent light guide plate positioned on the side, an optically transparent display device can be realized even in non-operation.

However, such a conventional technique does not provide a user with a convenient technique to select and use three modes, namely, an image viewing mode, a cue-through mode, and an external environment viewing mode.

The object of the present invention is to solve the conventional problems as described above. In the conventional HMD product, only one function of See-Through function or See-Close function is provided But the present invention provides a cue-through head-mounted display device capable of viewing images in various environments by allowing a black LCD to simultaneously realize a function of blocking a light source and passing a light source.

Another object of the present invention is to maximize the feeling of immersion during viewing as a video viewing mode, for example, in case of watching a movie, and to apply it in conjunction with a camera for fire control, Through head mount display apparatus capable of recognizing an object in the visible region and easily driving the apparatus with a single button operation without removing the apparatus from the head.

In order to achieve the above object, the present invention provides a head-mounted head-mounted display device which ensures a user's view at all times when necessary even when worn on a head,

A head mount unit having an LED inside to output an image, a speaker mounted on the head mount,

A black LCD unit mounted on the front of the head mount unit to provide on / off operation of the head mount unit and selectively providing light to the inside of the head mount unit;

An optical module unit mounted in the head mount unit to direct an image of the LED and a light representing an external environment provided from the black LCD unit to the user's eyes; And

And a control unit electrically connected to the head mount unit and having an image input processing unit, a key operation unit, and a power supply unit and being connectable to various media devices to generate various types of video and audio signals, Through-head mount display apparatus is provided which is configured to be able to select any one of three modes, i.e., a cue-through mode, and an external environment viewing mode.

Preferably, the head mount portion comprises a body portion in the form of an eyeglass, a black LCD portion is disposed on a front side of an optical module positioned on the user's side, and a window of a transparent plastic material is disposed on a rear side of the optical module Through head mount display device configured to prevent foreign matter from entering the inside of the optical module and to output audio by disposing loudspeakers on both ear portions of the body portion.

In addition, the present invention is also advantageous in that the black LCD part is turned on / off to block or pass light entering from the outside to the optical module, to block the light when off, through display function in which light is introduced into an external environment and an external environment viewing mode in which an image is overlapped with an external environment is provided.

Preferably, the optical module unit includes a polarizer for providing light emitted from the LED and uniformly and linearly emitting the light emitted from the LED, and the light passing through the polarizer is reflected And a reflection mirror for reflecting the light reflected from the display panel is provided. The liquid crystal display device according to claim 1, wherein the liquid crystal display device includes a liquid crystal display (LCD) having a mirror polarizer for reflecting the light, Through head mount display device including a half mirror for passing light reflected from the display panel and reflecting the light reflected from the reflection mirror so that a user can see a final image to provide.

Also, in the present invention, preferably, the control unit connects various media devices (DVD, PC, etc.) to receive various types of video and audio signals, and a signal processed by the video input processing unit is transmitted to the head mount unit through a wire Through the key operation unit, it is possible to change image modes such as an image viewing mode, a cue-through mode and an external environment viewing mode, and can increase / decrease the volume, select functions of input signals (D-SUB, HDMI, CVBS) Through head mounted display device configured to perform an operation.

Through the head-mounted display device according to the present invention, in a state in which the user wears his / her head, the image can be easily switched from the image viewing mode through the cue-through mode to the external environment viewing mode through the key operation portion of the control portion.

When an image viewing mode is selected by the user, the black LCD is turned off and the LED is turned on to watch the immersive image. When the mode is turned on, the black LCD is turned on , The LED is also turned on, so that the external environment and the image can be simultaneously viewed. When the external environment view mode is selected, the black LCD is turned on and the LED is turned off, so that only the external environment can be seen.

Therefore, according to the present invention, the black LCD can realize the function of blocking the light source and passing the light source at the same time, thereby enabling viewing of images in various environments.

Through-head-mounted display device according to the present invention can maximize the immersion feeling during viewing as a video viewing mode, for example, in case of watching movies, and in conjunction with a shooting camera for military purposes, It is possible to apply it to the specialized environment that overlaps the image coming from the control camera and the external image by covering the cover of the city and the rifle. In case of recognizing the external situation in the external environment viewing mode, The output image can be superimposed, the object in the visible region can be recognized, and an excellent effect can be obtained that can be easily operated by one button operation without removing the device from the head.

According to the present invention, ultra low video distortion (4%) is very small compared with other optical modules, and it is easy to apply to binocular or monocular products when a product is produced in one module form.

1 is an external perspective view showing a cue-through head-mounted display device according to the present invention.
FIG. 2 is an exploded perspective view illustrating a head mount unit included in a cue-through head-mounted display device according to the present invention.
FIG. 3 is an exploded cross-sectional view showing an optical module unit included in the cue-through head-mounted display device according to the present invention, showing a light transmission path in an image viewing mode state.
4 is an external perspective view illustrating a control unit included in the cue-through head-mounted display device according to the present invention.
FIG. 5 is a block diagram illustrating the components included in the seed-through head-mounted display device according to the present invention.
FIG. 6 shows a light transmission path in a seed-through mode state by the seed-through head-mounted display device according to the present invention.
FIG. 7 shows a light transmission path in an external environment viewing mode made by a cue-through head-mounted display device according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Through-head-mounted display apparatus 100 according to the present invention includes a head mount unit 110 to be worn on a head, as shown generally in FIG.

The head mount 110 includes a body 112 having an eyeglass shape as shown in FIG. 2, and an LED 152 is provided inside the body 112 to output an image. Speakers 116a and 116b are disposed on both side ear portions 114a and 114b of the body portion 112 to output audio signals.

In the head mount 110, the optical module unit 130 as shown in FIG. 3 is disposed on the eye side of the user, that is, on both sides of the user. A window 132 of a transparent plastic material is disposed on the rear side of the optical module unit 130 to safely prevent foreign matter from entering the optical module unit 130 side.

The black LCD 140 is mounted on the front of each of the optical module units 130 in front of the head mount unit 110 and is selectively turned on and off by the head mount unit 110, The optical module unit 130 of FIG.

That is, as described later in detail, the black LCD 140 blocks or passes light that is externally input to the optical module unit 130, off function, it is possible to maximize the immersion feeling when viewing an image through the image viewing mode by blocking the light in the state of off-state, and to provide a seed-through function or an external environment viewing mode in which light is introduced in the on- do.

The optical module unit 130 included in the head-mounted display apparatus 100 according to the present invention is mounted inside the head mount unit 110 and displays images of the LED 152 and the black And directs light representing the external environment provided from the LCD portion 140 to the user's eyes.

3, the optical module unit 130 includes an LED 152 for emitting light, and a polarizer 154 for uniformly and linearly emitting the light emitted from the LED 152 ) Adjacent to each other.

And a mirror polarizer 156 for reflecting the light having passed through the polarizer 154. The display panel Lcos (Liquid Crystal On Silicon) 158 on the light transmission path.

The optical module unit 130 includes a reflective mirror 160 that reflects light reflected from the display panel 158 and passes light reflected from the display panel 158 to the reflective mirror 160 (Half Mirror) 162 for reflecting the light reflected by the light source 160. The user can see the final image at the eye position 166. [

The head-mounted display apparatus 100 according to the present invention is electrically connected to the head mount unit 110 through a wire line 172 as shown in FIG. 4, 182, a key operation unit 184, and a power supply unit 186, and a control unit 180 connected to various media devices to generate various types of video and audio signals.

The control unit 180 connects various media devices (DVD, PC, etc.) to receive various types of video and audio signals, and a signal processed by the video input processing unit 182 is transmitted to the head mount The user can change a video mode such as an image viewing mode, a cue-through mode, and an external environment viewing mode through the key operation unit 184. [

The control unit 180 is configured to perform functions such as increasing / decreasing the volume of an audio signal and selecting an input signal (D-SUB, HDMI, CVBS) , And the external environment view mode.

FIG. 5 is a block diagram of a seed-through head-mounted display device 100 according to the present invention.

In this block diagram, a head mount 110 for viewing a video and listening to an audio signal, and a control unit 180 for processing video data and various data are shown.

The head mount unit 110 outputs video and audio signals received from the control unit 180 and receives an on / off signal of the black LCD unit 140 and the LED 152, .

The control unit 180 includes an image input processing unit 182, a key operation unit 184, and a power supply unit 186 that can be connected to D-Sub, HDMI, and CVBS. Etc., to receive various types of video and audio signals.

The signal processed in the image input processing unit 182 of the control unit 180 is transmitted to the head mount unit 110 through the wired line 172 and is also transmitted through the key operation unit 184 to the image viewing mode, Mode, and external environment viewing mode. It is possible to increase / decrease the volume and to select the input signal, ie, to perform functions such as D-SUB, HDMI and CVBS.

Hereinafter, the operation mode of the seed-through head-mounted display device 100 according to the present invention will be described in more detail.

Through-head-mounted display apparatus 100 according to the present invention allows a user to select any one of three modes, namely, an image viewing mode, a cue-through mode, and an external environment viewing mode.

3, the black LCD 140 is turned on and the external light is turned off, the LED 152 is turned on, . At this time, a schematic movement path of the light (image) can be displayed as follows.

That is, the light emitted from the LED 152 is uniformly and linearly transmitted through the polarizer 154 and is reflected by the mirror polarizer 156 to form a display panel 158, Lcos (Liquid Crystal On Silicon) to have an image shape.

The light reflected from the display panel 158 passes through a mirror polarizer 156 and passes through a half mirror 162 and is reflected by a reflection mirror 160 And reflected by the half mirror 162 back to the user's eye position 166 to see the final image.

Next, in the case of the seed-through mode P2, the outline of the basic operation is the same as that of the video viewing mode. That is, the light from the LED 152 proceeds in the same manner as the image viewing mode, but the black LCD 140 is turned off, and the external light source is introduced through the black LCD 140, 6, the external environment image (light source) passes through the black LCD part 140 and the half mirror 162 to generate a viewing image from the LED 152 and a cue-through mode in which the external environment image is superimposed (P2).

In the external environment viewing mode P3, the LED 152 for emitting light is turned off, and the image of the display panel 158, which is introduced into the eyes, disappears. The black LCD 140 is off ) To introduce an external light source. At this time, as shown in FIG. 7, only the external environment image (light source) passing through the black LCD 140 and the half mirror 162 is seen, and the driving method in this state is referred to as an external environment viewing mode.

As described above, according to the cue-through head-mounted display device 100 of the present invention, when the user wears the head, the user operates the key operation unit 184 of the control unit 180 to perform key operation The mode is switched to the mode (P1) -> the seed-through mode (P2) -> the external environment viewing mode (P3).

For example, the button 184a of the key operation unit 184 of the control unit 180 shown in FIG. 4 is a multifunctional switch that functions to turn on / off the power when the key is pressed for a long time, The mode is switched to the image viewing mode (P1), the seed-through mode (P2), and the external environment viewing mode (P3) every time the button is pressed. Other buttons 184b perform various functions such as volume control, menu navigation, and the like.

When the image viewing mode P1 is selected by the user, the black LCD 140 is turned off and the LED 152 is turned on to watch the immersive image. P2, the black LCD 140 is turned on and the LED 152 is turned on so that the external environment and the image can be simultaneously viewed. When the external environment viewing mode P3 is selected, The LED 140 is turned on and the LED 152 is turned off so that the user can see only the external environment.

Through the head-mounted display device 100 according to the present invention, the black LCD 140 implements light source blocking and light source passing functions at the same time, It is possible.

Through the head-mounted display apparatus 100 according to the present invention, for example, in the case of watching a movie, a feeling of immersion can be maximized in an image viewing mode P1, , It can be applied to the specialized environment where the rifle captain covers the hidden image of the control camera and superimposes the external image on the control camera.

In addition, when the external environment is required to be recognized in the external environment viewing mode (P3), it is possible to superimpose the images output during movie watching or moving during daily walking, to recognize objects in the visible region, An excellent effect can be obtained that can be easily driven by one button operation without being removed.

According to the present invention, ultra low video distortion (4%) is very small compared with other optical modules, and it is easy to apply to binocular or monocular products when a product is produced in one module form.

Although the present invention has been described in detail with reference to specific embodiments thereof with reference to the drawings, the present invention is not limited to these specific structures. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. However, it is intended that the present invention covers all such modifications and variations as fall within the true scope of the invention.

100: a seed-through head-mounted display device according to the present invention
110: head mount part 112:
114a, 114b: earring portions 116a, 116b: speakers
130: optical module part 132: window
140: Black LCD Part 152: LED
154: Pollizer 156: Mirror Pollerizer
158: Display panel (Lcos: Liquid Crystal On Silicon)
160: reflection mirror 162: half mirror
166: eye position 172: wired line
180: Control section 182: Image input processing section
184: key operation unit 186: power supply unit
P1: Picture viewing mode P2: Sea-through mode
P3: External Viewing Mode

Claims (5)

A head-mounted head-mounted display device for securing a user's view at all times when needed on a head,
A head mount unit having an LED inside to output an image, a speaker mounted on the head mount,
A black LCD unit mounted on the front of the head mount unit to provide on / off operation of the head mount unit and selectively providing light to the inside of the head mount unit;
An optical module unit mounted in the head mount unit to direct an image of the LED and light representing an external environment provided from the black LCD unit to the user's eyes; And
And a control unit electrically connected to the head mount unit and having an image input processing unit, a key operation unit, and a power supply unit and being connectable to various media devices to generate various types of video and audio signals, Through mode, and an external environment viewing mode, in accordance with the present invention. The optical module as claimed in claim 1, wherein the head mount part comprises a body part in the form of a spectacle, a black LCD part is disposed on a front side of an optical module located on a user's side, a window of a transparent plastic material is disposed on a rear side of the optical module, Through head mount display device according to claim 1 or 2, wherein the head-mounted display device is configured to prevent foreign matter from entering into the inside of the body part, and to output audio data by arranging speakers on both ear- 2. The optical module as claimed in claim 1, wherein the black LCD portion is on-off to block or transmit light to the optical module from the outside, and to block light when the module is off, Thru function or an external environment viewing mode in which light is introduced in an on state and an image is overlapped with an external environment. The optical module as claimed in claim 1, wherein the optical module unit comprises a polarizer for providing light to emit light and uniformly emitting light emitted from the LED, and a mirror for reflecting light passing through the polarizer, And a reflective mirror for reflecting light reflected from the display panel, wherein the reflective mirror has a display panel (Lcos: Liquid Crystal On Silicon) that reflects the light and has an image shape, And a half-mirror for reflecting the light reflected from the reflective mirror is provided inside the display panel so that the user can see the final image. Device. The apparatus of claim 1, wherein the control unit connects various media devices (DVD, PC, etc.) to receive various types of video and audio signals, and a signal processed in the video input processing unit is transmitted to the head mount unit via a wire, Through the key operation section, you can change video modes such as video viewing mode, cue-through mode, and external viewing mode, and you can change the volume, increase or decrease the volume, and select input signals (D-SUB, HDMI, CVBS) Through head mount display device.
KR2020150008290U 2015-12-16 2015-12-16 See-through head mount display device KR20170002262U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023149724A1 (en) * 2022-02-04 2023-08-10 한국과학기술원 Organic light-emitting short-term visual stimulation platform for brain function control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023149724A1 (en) * 2022-02-04 2023-08-10 한국과학기술원 Organic light-emitting short-term visual stimulation platform for brain function control

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