Head-mounted display devices

Abstract

The present application relates to a head-mounted display device. The head-mounted display device includes: a lens assembly that changes the path of light; a main display module that outputs a main image and is located in front of the lens assembly; a main optical block that shields at least a portion of light representing the main image so that the light representing the main image faces the lens assembly; a sub-display module that is disposed on one side of the main optical block and outputs a sub-image; a sub-optical block that is located on the one side of the main optical block and shields at least a portion of light representing the sub-image; and an optical path converter that is located in the sub-optical block and changes the path of light representing the sub-image so that the light representing the sub-image faces the lens assembly.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2020-0078097, filed on June 25, 2020, and all benefits arising therefrom, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0002] The present invention relates to a head-mounted display device and a method for providing content using the head-mounted display device, and more particularly, to a head-mounted display device in which light provided from a display is provided to a user through a predetermined reflective element and a method for providing content using the head-mounted display device. Background Art

[0003] Recently, research on wearable devices including display devices has been actively conducted. In particular, a head-mounted display device, which is one type of wearable device including a display device, can be mounted on the user's head to provide the user with visual information with a higher sense of reality.

[0004] However, in a conventional head-mounted display device, visual data is provided to a user in a limited space, and the visual data is output at a viewing angle limited to a specific range.

[0005] In order to increase the viewing angle, a method of increasing the size of a display module provided in a head-mounted display device may be used, but in this case, the volume and / or mass of the head-mounted display device may increase, thereby causing inconvenience to the user.

[0006] Therefore, there is an increasing demand for a device in which a viewing angle is improved and an increase in the volume and / or mass of a display device is minimized. Summary of the Invention

[0007] An aspect of the present invention is to provide a head-mounted display device in which a viewing angle of an image provided from a display module is increased and an increase in volume or mass is minimized, and a method of providing content using the head-mounted display device.

[0008] However, aspects of the present invention are not limited to the above-mentioned aspects, and other aspects not mentioned will be clearly understood by those skilled in the art from the following description.

[0009] A head-mounted display device according to an embodiment of the present invention includes: a lens assembly that changes the path of light; a main display module that outputs a main image and is located in front of the lens assembly; a main optical block that shields at least a portion of the light representing the main image so that the light representing the main image faces the lens assembly; a sub-display module that is provided on one side of the main optical block and outputs a sub-image; a sub-optical block that is located on the one side of the main optical block and shields at least a portion of the light representing the sub-image; and an optical path converter that is located in the sub-optical block and changes the path of the light representing the sub-image so that the light representing the sub-image faces the lens assembly.

[0010] The optical path converter may include a reflective diffraction grating.

[0011] The optical path converter may be located in the sub-optical block to face the sub-display module from which the sub-image is provided.

[0012] Light representing the sub-image may be provided to the optical path converter along a first direction and may be reflected from the optical path converter to be provided to the lens assembly along a second direction different from the first direction.

[0013] The lens assembly may change the path of light representing the main image and the path of light representing the sub-image to provide the lights to a position corresponding to the focus of the user's eyes.

[0014] The head-mounted display device may further include a light collimator that is located on the sub-display module and changes light representing the sub-image provided from the sub-display module into collimated light.

[0015] The main optical block may be located between the lens assembly and the main display module.

[0016] The sub-image may correspond to an edge portion of the main image.

[0017] The edge portion image of the main image may be an image output from a partial area adjacent to the sub-display module in the main display module.

[0018] The sub display module may include a first sub display module and a second sub display module, the first sub display module may be disposed on a first surface of the main optical block, and the second sub display module may be disposed on a second surface of the main optical block facing the first surface.

[0019] The sub-image may be an edge portion image of the main image, and the edge portion image of the main image may include a first edge portion image and a second edge portion image. The first edge portion image may correspond to an image output from a first partial area of ​​the main display module adjacent to the first sub-display module, and the second edge portion image may correspond to an image output from a second partial area of ​​the main display module adjacent to the second sub-display module.

[0020] The head-mounted display device may define: a first space located between the main optical block and the lens assembly; a second space located between the sub-optical block and the optical path converter; and an opening fluidly connecting the first space and the second space.

[0021] The head-mounted display device may further include a light-transmitting diffraction unit that is located on the sub-display module and changes a direction of light representing the sub-image output from the sub-display module.

[0022] The main display module and the sub-display module may be separate components.

[0023] The main display module and the sub-display module may include a predetermined display panel, and the predetermined display panel may be at least one of an organic light-emitting display panel, a nano-level LED display panel, a quantum dot organic light-emitting display panel, a liquid crystal display panel, an electrophoretic display panel or an electrowetting display panel.

[0024] When a user wears the head-mounted display device, the lens assembly can be arranged to correspond to the position of the user's eyes.

[0025] According to an embodiment of the present invention, a method for providing content using a head-mounted display device is provided. The head-mounted display device includes: a lens assembly that changes the path of light; a main display module that outputs a main image and is located in front of the lens assembly; a main optical block that shields at least a portion of light representing the main image so that the light representing the main image faces the lens assembly; a sub-display module that is disposed on one side of the main optical block and outputs a sub-image; a sub-optical block that is located on the one side of the main optical block and shields at least a portion of light representing the sub-image so that the light representing the sub-image is not exposed to the outside; and an optical path converter that is located in the sub-optical block and changes the path of light representing the sub-image so that the light representing the sub-image faces the lens assembly. The method may include: outputting the main image through the main display module; outputting a sub-image through the sub-display module, the sub-image corresponding to a portion of the main image output from an edge region of the main display module; providing light representing the main image to the lens assembly; providing light representing the sub-image to the lens assembly through the optical path converter; and simultaneously providing the main image provided to the lens assembly and the sub-image provided to the lens assembly through the optical path converter to a user.

[0026] The edge region of the main display module may be a local region of the main display module adjacent to the sub-display module.

[0027] The optical path converter may be located in the sub-optical block to face a surface of a sub-display module from which the sub-image is provided.

[0028] When the main image and the sub image are provided simultaneously, the viewing angles for the main image and the sub image provided to the user may be increased compared to the viewing angle when only the main image is provided.

[0029] The means for solving the technical problem of the present invention is not limited to the above-mentioned solutions. From this specification and the accompanying drawings, solutions not mentioned can be clearly understood by those skilled in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the inventive concept and are incorporated in and constitute a part of this specification. The accompanying drawings illustrate embodiments of the inventive concept and together with the description serve to explain the principles of the inventive concept.

[0031] Figure 1 is a perspective view showing a head-mounted display device according to an embodiment of the present invention.

[0032] Figure 2 is a plan view schematically showing a display panel included in the display unit of the head-mounted display device according to the embodiment of the present invention.

[0033] Figure 3 is a circuit diagram showing a pixel driving circuit for each pixel included in the head-mounted display device according to an embodiment of the present invention.

[0034] Figure 4 is a cross-sectional view of a display panel included in a head-mounted display device according to an embodiment of the present invention.

[0035] Figure 5 is a plan view schematically showing a display unit of a head-mounted display device according to an embodiment of the present invention.

[0036] Figure 6 It is schematically shown Figure 5 Diagram of the area EA.

[0037] Figure 7 : is a diagram showing the content of an image provided from the display unit of the head-mounted display device according to an embodiment of the present invention.

[0038] Figure 8 is a plan view showing a display unit of a head-mounted display device according to another embodiment of the present invention.

[0039] Figure 9 is a diagram illustrating the content of an image provided from a display unit of a head-mounted display device according to another embodiment of the present invention.

[0040] Figure 10is a flowchart illustrating a method for providing content using a head mounted display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The embodiments described in this specification are intended to clearly explain the spirit of the present invention to those skilled in the art. Therefore, the present invention is not limited by the embodiments described herein. The scope of the present invention should be interpreted as including modifications or variations that do not deviate from the spirit of the present invention.

[0042] Taking into account the functions of the present invention, the terms used in this specification are selected from the general terms currently in widespread use. However, this may change according to the intention or custom of those skilled in the art, or the emergence of new technologies. However, in contrast, when a specific term is defined and used with arbitrary meanings, the meaning of the term will be described separately. Therefore, the terms used in this specification should be interpreted based on the actual meaning of the terms and content throughout this specification rather than the names of the terms.

[0043] The accompanying drawings are used to facilitate explanation of the present invention. The shapes of the components shown in the accompanying drawings may be exaggerated and displayed as needed to help understand the present invention. Therefore, the present invention is not limited by the accompanying drawings.

[0044] In this specification, when it is determined that a detailed description of a well-known configuration or function related to the present invention may obscure the subject matter of the present invention, the detailed description thereof will be omitted as needed.

[0045] It will be understood that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may be present between them. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present.

[0046] It will be understood that although the terms "first," "second," "third," etc. may be used herein to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Thus, the "first element," "first component," "first area," "first layer," or "first portion" discussed below may be referred to as a second element, second component, second area, second layer, or second portion without departing from the teachings herein.

[0047] The terms used herein are only used to describe the purpose of specific embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms, including "at least one". "At least one" should not be interpreted as limiting "a" or "an". "Or" means "and / or". As used herein, the term "and / or" includes any combination and all combinations of one or more of the associated listed items. It will also be understood that when the terms "comprise" and / or "comprising" or "include" and / or "including" are used in this specification, the presence of the features, regions, wholes, steps, operations, elements and / or parts stated is specified, but the presence or addition of one or more other features, regions, wholes, steps, operations, elements, parts and / or groups thereof is not excluded.

[0048] In the following, reference will be made to Figures 1 to 10 A head-mounted display device according to an embodiment of the present invention is described.

[0049] Figure 1 is a perspective view showing a head-mounted display device according to an embodiment of the present invention.

[0050] A head-mounted display (HMD) is a device configured to provide visual data to a user and is mounted (or worn) on the user's head. When the HMD is worn, image data is provided to the user's eyes, allowing the user to visually recognize the image information provided by the HMD.

[0051] The head-mounted display device HMD may include a housing 10 , a display unit 20 , and a mounting unit 30 .

[0052] The display unit 20 and the mounting unit 30 may be connected to the housing 10. The housing 10 may support the outer shape of the head mounted display device HMD.

[0053] An electrical configuration configured to operate the display unit 20 may be included in the housing 10. According to an embodiment, a driving power source and a processor for driving the display unit 20 may be included in the housing 10.

[0054] The display unit 20 may be located on one surface of the housing 10. According to an embodiment, when the head mounted display device HMD is mounted on the user's head, the display unit 20 may be provided on a surface opposite to a surface of the housing 10 adjacent to the user's face.

[0055] The display unit 20 may include a display panel ( Figure 2The display panel DP may refer to a display panel including a light emitting element (e.g., a display panel) that emits light when an electrical signal is applied. Figure 3 The configuration is referred to as "LD" in the text.

[0056] Will refer to it later Figures 5 to 9 The configuration and operation of the display unit 20 are described.

[0057] The mounting unit 30 may be located on another surface of the housing 10 opposite to the surface of the housing 10 to which the display unit 20 is attached. According to an embodiment, when the head-mounted display device HMD is mounted on the user's head, the mounting unit 30 may be physically connected to at least a portion of the surface of the housing 10 adjacent to the user's face.

[0058] The mounting unit 30 can help install the head-mounted display device HMD on the user's head. According to an embodiment, the mounting unit 30 can be configured in the form of an elastic band. In this case, due to the restoring force of the mounting unit 30, the head-mounted display device HMD can be fixed at a predetermined position relative to the user's head. Alternatively, although not shown in the drawings, the mounting unit 30 can be configured in the form of temples. However, the embodiment of the mounting unit 30 according to the present invention is not limited to the above-mentioned embodiment or drawings. Various embodiments for realizing the above-mentioned functions can be applied to the head-mounted display device HMD according to the present invention.

[0059] Figure 2 is a plan view schematically showing a display panel included in the display unit of the head-mounted display device according to the embodiment of the present invention.

[0060] refer to Figure 2 The display panel DP may include a substrate SUB, pixels PXL, a driving unit, and a wiring unit. The driving unit may include a scan driver SDV, an emission driver EDV, and a data driver DDV.

[0061] The display panel DP can output visual data. As the display panel DP, a self-luminous display panel can be used, such as an organic light-emitting display panel using an organic light-emitting diode ("OLED") as a light-emitting element, a nanoscale LED display panel using a nanoscale LED as a light-emitting element, and a quantum dot organic light-emitting display ("QD" OLED) panel using quantum dots and organic light-emitting diodes. However, the present invention is not limited to the above examples. In another embodiment, the display panel DP can be at least any one of a liquid crystal display ("LCD") panel, an electrophoretic display ("EPD") panel, and an electrowetting display ("EWD") panel.

[0062] The substrate SUB may include a display area DA and a non-display area NDA. The non-display area NDA may surround the display area DA.

[0063] The pixels PXL may be located on the substrate SUB. The pixels PXL may be located in the display area DA. Light may be emitted in the third direction DR3 in the display area DA. The pixels PXL may be arranged in a matrix along rows extending along the first direction DR1 and columns extending along the second direction DR2.

[0064] At least one of the scan driver SDV, the emission driver EDV, and the data driver DDV may be located in the non-display area NDA together with the wiring unit. In an embodiment, the non-display area NDA may not include the pixels PXL.

[0065] The substrate SUB may include a rigid material or a flexible material, depending on the purpose for which the display device is used. However, the material of the substrate SUB applied to the embodiment of the present invention is not limited to a specific example.

[0066] When viewed from the top (i.e., in a plan view), the scan driver SDV, the emission driver EDV, and the data driver DDV may be located in the non-display area NDA. The scan driver SDV, the emission driver EDV, and the data driver DDV may output electrical information provided to the pixels PXL. When the electrical information is provided to the pixels PXL, the light emitting element LD included in each of the pixels PXL may emit light.

[0067] The scan driver SDV may transmit a scan signal to the pixel PXL through the scan line.

[0068] The emission driver EDV may provide an emission control signal to the pixel PXL through the emission control line.

[0069] The data driver DDV may provide data signals to the pixels PXL through the data lines.

[0070] When viewed from the top, the wiring unit may be located in the non-display area NDA. The wiring unit may electrically connect the driving unit and the pixel PXL.

[0071] Figure 3 is a circuit diagram showing a pixel driving circuit for each pixel included in the head-mounted display device according to an embodiment of the present invention.

[0072] Each pixel PXL included in the display panel DP according to an embodiment of the present invention may include a pixel driving circuit PXC.

[0073] The pixel driving circuit PXC may include first to seventh transistors T1 to T7 and a storage capacitor Cst. The pixel driving circuit PXC may be electrically connected to the light emitting element LD.

[0074] The first electrode of the first transistor T1 may be connected to the first power supply ELVDD via the fifth transistor T5, and the second electrode of the first transistor T1 may be connected to the anode electrode of the light emitting element LD via the sixth transistor T6. The first transistor T1 may control a current flowing from the first power supply ELVDD to the second power supply ELVSS via the light emitting element LD based on the voltage of the first node N1. The first transistor T1 may be a driving transistor.

[0075] The second transistor T2 may be connected between the first electrode of the first transistor T1 and the j-th data line Dj. The gate electrode of the second transistor T2 may be connected to the i-th scan line Si. When a scan signal with a gate-on voltage is applied from the i-th scan line Si, the second transistor T2 may be turned on to electrically connect the j-th data line Dj and the first electrode of the first transistor T1. The second transistor T2 may be a switching transistor.

[0076] The third transistor T3 may be connected between the second electrode of the first transistor T1 and the first node N1. When a scan signal of a gate-on voltage is applied from the i-th scan line Si, the third transistor T3 may be turned on to electrically connect the second electrode of the first transistor T1 and the first node N1.

[0077] The fourth transistor T4 may be connected between the first node N1 and an initialization power line IPL to which an initialization power supply Vint is applied. A gate electrode of the fourth transistor T4 may be connected to the (i-1)th scan line Si-1. When a scan signal with a gate-on voltage is applied from the (i-1)th scan line Si-1, the fourth transistor T4 may be turned on to supply the voltage of the initialization power supply Vint to the first node N1. The fourth transistor T4 may be an initialization transistor.

[0078] The fifth transistor T5 may be connected between the power line PL to which the first power source ELVDD is applied and the first transistor T1. A gate electrode of the fifth transistor T5 may be connected to the i-th emission control line Ei. When an emission control signal (e.g., a high-level voltage) of a gate-off voltage is applied from the i-th emission control line Ei, the fifth transistor T5 may be turned off, and may be turned on otherwise.

[0079] The sixth transistor T6 may be connected between the first transistor T1 and the light emitting element LD. A gate electrode of the sixth transistor T6 may be connected to the i-th emission control line Ei. When an emission control signal of a gate-off voltage is applied from the i-th emission control line Ei, the sixth transistor T6 may be turned off, and may be turned on in other cases.

[0080] The seventh transistor T7 may be connected between the initialization power supply line IPL and the anode electrode of the light-emitting element LD. The gate electrode of the seventh transistor T7 may be connected to the (i+1)th scan line Si+1. When a scan signal of a gate-on voltage (e.g., a low-level voltage) is applied from the (i+1)th scan line Si+1, the seventh transistor T7 may be turned on to supply the voltage of the initialization power supply Vint to the anode electrode of the light-emitting element LD. The signal applied to the gate electrode of the seventh transistor T7 may be a signal having the same timing as the scan signal of the gate-on voltage applied from the i-th scan line Si.

[0081] In this case, the voltage of the initialization power source Vint may be set to a voltage lower than the voltage of the data signal. For example, the voltage of the initialization power source Vint may be set to be less than or equal to the lowest voltage of the data signal.

[0082] The storage capacitor Cst may be connected between the power line PL to which the first power source ELVDD is applied and the first node N1. The storage capacitor Cst may store information about the data signal and information about a voltage corresponding to the threshold voltage of the first transistor T1.

[0083] The anode electrode of the light emitting element LD may be connected to the first transistor T1 via the sixth transistor T6. The cathode electrode of the light emitting element LD may be connected to the second power source ELVSS.

[0084] The light emitting element LD may emit light with a predetermined brightness corresponding to the amount of current supplied from the first transistor T1. The voltage value of the first power source ELVDD may be set higher than the voltage value of the second power source ELVSS so that current flows through the light emitting element LD.

[0085] The light emitting element LD may be composed of an organic light emitting diode such as a micro light emitting diode ("LED") and a quantum dot light emitting diode, or an inorganic light emitting diode. Furthermore, the light emitting element LD may be a light emitting element composed of a composite material of an organic material and an inorganic material.

[0086] exist Figure 3 In FIG. 4 , the pixel PXL is shown as including a single light emitting element LD. However, in another embodiment, the pixel PXL may include a plurality of light emitting elements LD. The plurality of light emitting elements LD may be connected to each other in series, in parallel, or in series and parallel.

[0087] Hereinafter, for convenience of description, a case where the light emitting element LD included in the head mounted display device HMD is an organic light emitting diode ("OLED") will be described as an example.

[0088] In addition, Figure 3, a case where the pixel PXL is driven by signals from the i-th scan line Si, the (i-1)-th scan line Si-1, and the (i+1)-th scan line Si+1 is described as an example, but the present invention is not limited thereto. In another embodiment, for example, the i-th scan line Si, the (i-1)-th scan line Si-1, and the (i+1)-th scan line Si+1 may be separate signal lines, each receiving a scan signal from a different scan driver SDV.

[0089] In the following, reference will be made to Figure 4 A detailed individual structure of the display panel DP included in the head-mounted display device HMD according to an embodiment of the present invention is described.

[0090] Figure 4 is a cross-sectional view of a display panel included in a head-mounted display device according to an embodiment of the present invention.

[0091] Figure 4 It can be shown that when the first direction (in Figure 2 Observe on Figure 2 The display panel DP shown in FIG is a cross-sectional view of a cross section of the display panel DP. Figure 4 For ease of explanation, Figure 3 Among the first to seventh transistors T1 to T7 shown in FIG, only the cross sections of portions corresponding to the second transistor T2 and the sixth transistor T6 are shown.

[0092] The display panel DP may include a substrate SUB, a pixel circuit unit PCL, a light emitting element unit DPL, and a thin film encapsulation layer TFE.

[0093] The substrate SUB may include a rigid material or a flexible material. The flexible material may include, for example, at least one of polystyrene, polyvinyl alcohol, polymethyl methacrylate, polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, cellulose triacetate, and cellulose acetate propionate. However, the material of the substrate SUB used in the embodiments of the present invention is not limited to the specific examples.

[0094] The pixel circuit unit PCL may be located on the substrate SUB and may include a buffer layer BFL, a gate insulating layer GI, a second transistor T2, a sixth transistor T6, a first interlayer insulating layer ILD1, a second interlayer insulating layer ILD2, a first conductive line CL1, a second conductive line CL2, a first contact hole CH1, and a passivation layer PSV.

[0095] A buffer layer BFL may be located on the substrate SUB. The buffer layer BFL may prevent impurities from diffusing into the sixth transistor T6 and / or the second transistor T2.

[0096] The buffer layer BFL may include silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) and aluminum oxide (AlO x However, according to an embodiment, the buffer layer BFL may be omitted.

[0097] The second transistor T2 may be located in the non-emission area NEMA, and the sixth transistor T6 may be located in the emission area EMA. However, the present invention is not limited thereto. According to an embodiment, the second transistor T2 may be located in the emission area EMA.

[0098] In this case, the light emitting layer EML of the organic light emitting diode OLED may be located in the light emitting area EMA, and the light emitting layer EML of the organic light emitting diode OLED may not be located in the non-light emitting area NEMA.

[0099] Each of the second transistor T2 and the sixth transistor T6 may include a semiconductor pattern SCL, a source electrode SE, a drain electrode DE, and a gate electrode GE.

[0100] The semiconductor pattern SCL may be located on the buffer layer BFL.

[0101] The semiconductor pattern SCL may be a semiconductor layer. According to an embodiment, the semiconductor pattern SCL may include at least one of polycrystalline silicon, amorphous silicon, and an oxide semiconductor.

[0102] The semiconductor pattern SCL may include a first contact region contacting the source electrode SE and a second contact region contacting the drain electrode DE.

[0103] The first contact region and the second contact region may be semiconductor patterns doped with impurities. The region between the first contact region and the second contact region may be a channel region. The channel region may be an intrinsic semiconductor pattern not doped with impurities.

[0104] The gate insulating layer GI may be disposed on the semiconductor pattern SCL. The gate insulating layer GI may include an inorganic material. According to an embodiment, the gate insulating layer GI may include silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) and aluminum oxide (AlO x According to an embodiment, the gate insulating layer GI may include an organic material.

[0105] The gate electrode GE may be located on the gate insulating layer GI.

[0106] The position of the gate electrode GE may correspond to the position of the channel region of the semiconductor pattern SCL. For example, the gate electrode GE may be disposed on the channel region of the semiconductor pattern SCL with the gate insulating layer GI interposed therebetween.

[0107] The first interlayer insulating layer ILD1 may be located on the gate electrode GE. Like the gate insulating layer GI, the first interlayer insulating layer ILD1 may include silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) and aluminum oxide (AlO x ) at least one of.

[0108] The source electrode SE and the drain electrode DE may be located on the first interlayer insulating layer ILD1. The source electrode SE may penetrate the gate insulating layer GI and the first interlayer insulating layer ILD1 to contact the first contact region of the semiconductor pattern SCL, and the drain electrode DE may penetrate the gate insulating layer GI and the first interlayer insulating layer ILD1 to contact the second contact region of the semiconductor pattern SCL.

[0109] In the above embodiment, the source electrode SE and drain electrode DE of each of the second transistor T2 and the sixth transistor T6 are described as being electrically connected to the semiconductor pattern SCL of the corresponding transistor by penetrating the gate insulating layer GI and the first interlayer insulating layer ILD1. However, the present invention is not limited thereto. According to an embodiment, the source electrode SE of each of the second transistor T2 and the sixth transistor T6 may be one of the first contact region and the second contact region adjacent to the channel region of the semiconductor pattern SCL of the corresponding transistor. Furthermore, the drain electrode DE of each of the second transistor T2 and the sixth transistor T6 may be the other of the first contact region and the second contact region adjacent to the channel region of the semiconductor pattern SCL. In this case, the drain electrode DE of each of the second transistor T2 and the sixth transistor T6 may be electrically connected to some elements of the light-emitting element unit DPL via separate connection means including contact electrodes or the like.

[0110] The second interlayer insulating layer ILD2 may be located on the source electrode SE and the drain electrode DE. Like the first interlayer insulating layer ILD1 and the gate insulating layer GI, the second interlayer insulating layer ILD2 may include an inorganic material. The inorganic material may include the materials exemplified as the materials constituting the first interlayer insulating layer ILD1 and the gate insulating layer GI, and silicon nitride (SiN x ), silicon oxide (SiO x ), silicon oxynitride (SiO x N y ) and aluminum oxide (AlOx According to an embodiment, the second interlayer insulating layer ILD2 may include an organic material.

[0111] The first conductive line CL1 may be located on the second interlayer insulating layer ILD2 and may be electrically connected to the source electrode SE through a contact hole penetrating the second interlayer insulating layer ILD2 .

[0112] The second conductive line CL2 may be located on the second interlayer insulating layer ILD2 and may be electrically connected to the drain electrode DE through a contact hole penetrating the second interlayer insulating layer ILD2 .

[0113] The first conductive line CL1 and the second conductive line CL2 may be paths through which electrical signals may flow. In particular, the second conductive line CL2 may be a bridge electrode electrically connecting the drain electrode DE of the sixth transistor T6 and some elements of the light-emitting element unit DPL. According to an embodiment, the first conductive line CL1 and the second conductive line CL2 may include at least one of molybdenum (Mo), tungsten (W), aluminum-neodymium (AlNd), titanium (Ti), aluminum (Al), and silver (Ag).

[0114] A passivation layer PSV may be disposed on the first and second conductive lines CL1 and CL2 . The passivation layer PSV may be provided in a form including an organic insulating layer, an inorganic insulating layer, or an organic insulating layer disposed on an inorganic insulating layer.

[0115] The passivation layer PSV may include a first contact hole CH1 exposing a portion of the second conductive line CL2 .

[0116] The first contact hole CH1 may be a path through which an electrical signal provided from the sixth transistor T6 is transmitted.

[0117] The light emitting element unit DPL may include a pixel defining layer PDL and an organic light emitting diode OLED.

[0118] The pixel defining layer PDL may define a position where the organic light emitting diode OLED is arranged.

[0119] The pixel defining layer PDL may include an organic material. According to an embodiment, the pixel defining layer PDL may include at least one of acrylic resin, epoxy resin, phenol resin, polyamide resin, and polyimide resin.

[0120] The organic light emitting diode OLED may include a first electrode AE, a light emitting layer EML, and a second electrode CE. The organic light emitting diode OLED may be located on the passivation layer PSV in the display area DA.

[0121] In this case, one of the first electrode AE ​​and the second electrode CE may be an anode electrode, and the other may be a cathode electrode. When the organic light emitting diode OLED is a top-emission organic light emitting diode, the first electrode AE ​​may be a reflective electrode, and the second electrode CE may be a transmissive electrode. Hereinafter, the case where the organic light emitting diode OLED is a top-emission organic light emitting diode and the first electrode AE ​​is an anode electrode will be described as an example.

[0122] The first electrode AE ​​may be located on the passivation layer PSV in the display area DA. The first electrode AE ​​may be electrically connected to the second conductive line CL2 through a first contact hole CH1. The first electrode AE ​​may include a reflective layer (not shown) capable of reflecting light or a transparent conductive layer (not shown) disposed above or below the reflective layer. For example, the first electrode AE ​​may be composed of a plurality of layers, including a lower transparent conductive layer made of indium tin oxide (“ITO”), a reflective layer made of silver (Ag) and disposed on the lower transparent conductive layer, and an upper transparent conductive layer made of indium tin oxide (“ITO”) and disposed on the reflective layer. At least one of the transparent conductive layer and the reflective layer may be electrically connected to the drain electrode DE of the sixth transistor T6 through the first contact hole CH1 of the passivation layer PSV.

[0123] The light emitting layer EML may be disposed in a region defined by the pixel defining layer PDL. The light emitting layer EML may define a light emitting region EMA from which light is emitted. The light emitting layer EML may include an organic material.

[0124] Specifically, the light-emitting layer EML may have a multilayer thin film structure including at least a light-generating layer. The light-emitting layer EML may include a hole injection layer for injecting holes, a hole transport layer having excellent hole transport properties and for increasing the chance of recombination of holes and electrons by suppressing the movement of electrons not bound in the light-generating layer, a light-generating layer that emits light through the recombination of injected electrons and holes, a hole blocking layer for suppressing the movement of holes not bound in the light-generating layer, an electron transport layer for smoothly transporting electrons to the light-generating layer, and an electron injection layer for injecting electrons. As described above, when an electrical signal is applied to the light-emitting layer EML, light may be emitted. The color of the light generated in the light-emitting layer EML may be one of red, green, blue, and white, but the present invention is not limited thereto. For example, the color of the light generated in the light-emitting layer EML may be one of magenta, cyan, and yellow.

[0125] The second electrode CE may be disposed on the light-emitting layer EML. The second electrode CE may be disposed in the form of a plate on the display area DA, but the present invention is not limited thereto. The second electrode CE may include a transparent conductive material, such as a transparent conductive oxide selected from indium tin oxide ("ITO"), indium zinc oxide ("IZO"), aluminum zinc oxide ("AZO"), gallium-doped zinc oxide ("GZO"), zinc tin oxide ("ZTO"), gallium tin oxide ("GTO"), and fluorine-doped tin oxide ("FTO"). According to an embodiment, when the organic light-emitting diode OLED is a bottom-emission organic light-emitting diode, the second electrode CE may include a semi-transparent conductive material, such as magnesium (Mg), silver (Ag), or an alloy of magnesium (Mg) and silver (Ag).

[0126] The thin film encapsulation layer (TFE) may be located on the second electrode CE. The thin film encapsulation layer (TFE) may include multiple insulating layers covering the organic light emitting diode (OLED). Specifically, the thin film encapsulation layer (TFE) may include at least one inorganic layer and / or at least one organic layer. For example, the thin film encapsulation layer (TFE) may have a structure in which inorganic layers and organic layers are alternately stacked.

[0127] In the following, reference will be made to Figures 5 to 7 The display unit 20 included in the head-mounted display device HMD according to the embodiment of the present invention is described in detail.

[0128] Figure 5 is a plan view schematically showing a display unit of a head-mounted display device according to an embodiment of the present invention.

[0129] refer to Figure 5 The display unit 20 may include a first cover panel CP1, a main display module MDM, a main optical block MOB, a first lens assembly LA1, a second cover panel CP2, a first sub-display module SDM1, a first sub-optical block SOB1, a first optical path converter LDS1, a first light collimator LP1 and a second lens assembly LA2.

[0130] In this case, the main display module MDM and the first sub-display module SDM1 may refer to the reference Figures 2 to 4 That is, the display panel DP may include a main display module MDM and a first sub-display module SDM1.

[0131] When the head-mounted display device HMD is mounted on the head of the user, the display unit 20 may be provided at a position corresponding to the eyes 40 of the user.

[0132] Depending on the embodiment, the display unit 20 may include a first display unit and a second display unit. In this case, when the head-mounted display device (HMD) is mounted on the user's head, the first display unit may correspond to the position of the user's left eye, and the second display unit may correspond to the position of the user's right eye. In this case, the first display unit may apply image data to the user's left eye, and the second display unit may apply image data to the user's right eye.

[0133] In the following, when installing the head mounted display device HMD, Figure 5 The second display unit corresponding to the position of the user's right eye is described. However, the technical features of the first display unit corresponding to the position of the user's left eye should be interpreted in a similar manner in consideration of the description of the second display unit to be described later.

[0134] The first cover panel CP1 may be located on one surface of the main display module MDM.The first cover panel CP1 may be disposed on a rear surface of the main display module MDM opposite to a surface on which the main optical block MOB is located.

[0135] The first cover panel CP1 can reduce external influences applied to the main display module MDM (for example, damage from external forces and penetration of foreign substances). The first cover panel CP1 can improve the impact resistance of the head-mounted display device HMD. According to an embodiment, the first cover panel CP1 may include at least one selected from polyurethane resin, epoxy resin, polyester resin, polyether resin, acrylate resin, acrylonitrile-butadiene-styrene ("ABS") resin and rubber. However, the present invention is not limited to the above examples.

[0136] When the head-mounted display device HMD is mounted on the user's head, the main display module MDM may be located in front of the user's eyes 40 .

[0137] The main display module MDM can output a main image. The main display module MDM can output the main image in a direction toward the user's eye 40. The main image can be provided in the form of visual information including image data. Light representing the main image can pass through the inner area 21 defined by the main optical block MOB (hereinafter referred to as the first space) and can be provided by the first lens assembly LA1 to a point corresponding to the focal point of the user's eye 40.

[0138] Like the main display module MDM, when the head-mounted display device HMD is mounted on the user's head, the main optical block MOB may be located in front of the user's eyes 40. However, the main optical block MOB may be located closer to the user's eyes 40 than the main display module MDM. The main optical block MOB may be located between the first lens assembly LA1 and the main display module MDM.

[0139] The main optical block MOB may shield at least a portion of light emitted from the main display module MDM and may prevent light representing a main image output from the main display module MDM from being emitted to an area other than the user's eyes 40 (eg, an external area).

[0140] The main optical block MOB may define an optical path through which light representing a main image output from the main display module MDM moves. According to an embodiment, the main optical block MOB may be provided in a form surrounding the optical path toward the first lens assembly LA1.

[0141] The first lens assembly LA1 may be located in front of the user's eye 40. The first lens assembly LA1 may be positioned closer to the user's eye 40 than the main optical block MOB and / or the main display module MDM.

[0142] The first lens assembly LA1 may change a path of light representing a main image so that the light representing the main image provided from the main display module MDM reaches a focal point of the user's eye 40 .

[0143] Depending on the embodiment, the first lens assembly LA1 may include a transparent material such as glass, plastic, or the like. For example, the first lens assembly LA1 may be provided in the form of at least one lens selected from a spherical lens, an achromatic lens, and an aspherical lens. Alternatively, according to another embodiment, the first lens assembly LA1 may be provided in the form of a Fresnel lens formed by etching continuous concentric grooves.

[0144] The second cover panel CP2 may be positioned on one surface of the main optical block MOB. The second cover panel CP2 may be disposed between the first sub display module SDM1 and the main optical block MOB.

[0145] Like the first cover panel CP1, the second cover panel CP2 can reduce external influences applied to the first sub-display module SDM1 (for example, damage from external forces and penetration of foreign substances). The second cover panel CP2 can improve the impact resistance of the head-mounted display device HMD. The second cover panel CP2 can be made of the same material as the first cover panel CP1.

[0146] When the head mounted display device HMD is mounted on the head of the user, the first sub display module SDM1 may be located in front of the eyes 40 of the user.

[0147] The first sub-display module SDM1 may be located on one side surface of the main optical block MOB. The side surface of the main optical block MOB may be a surface between the main display module MDM and the first lens assembly LA1 and does not directly face the user's eye 40. According to an embodiment, when viewed in a direction in which the user's eye 40 views the display unit 20, the first sub-display module SDM1 may be arranged on the right side surface of the main optical block MOB.

[0148] The first sub-display module SDM1 may output a first sub-image. The first sub-display module SDM1 may emit light representing the first sub-image in a direction that does not face the user's eye 40. The first sub-display module SDM1 may output light representing the first sub-image so that the light representing the first sub-image does not directly face the second lens assembly LA2.

[0149] Like the main image, the first sub-image can be provided in the form of visual information including image data. Light representing the first sub-image can be provided to the first optical path converter LDS1 facing the first sub-display module SDM1. The light representing the first sub-image provided to the first optical path converter LDS1 can pass through the inner area 27 (hereinafter referred to as the second space) defined by the first sub-optical block SOB1 and the first optical path converter LDS1 and can be provided by the second lens assembly LA2 to a point corresponding to the focal point of the user's eye 40.

[0150] The first sub-image may be an image representing a predetermined edge area of ​​the main image. The image representing the predetermined edge area of ​​the main image may be an image output from an area of ​​the main display module MDM adjacent to the first sub-display module SDM1. Figure 7 The correspondence relationship between the main image and the first sub image is described, and thus a detailed description thereof will be omitted here.

[0151] The first light collimator LP1 may be positioned on one surface of the first sub display module SDM1 facing the first light path converter LDS1.

[0152] The first light collimator LP1 can convert the light provided by the first sub-display module SDM1 into collimated light. At least a portion of the light representing the first sub-image that passes through the first light collimator LP1 can have collimated light characteristics. The path of the collimated light representing the first sub-image that passes through the first light collimator LP1 can be changed by the first optical path converter LDS1 and the second lens assembly LA2, and can be provided to the user's eye 40 with uniform brightness.

[0153] According to an embodiment, the first light collimator LP1 may be implemented with at least one of a microlens array, a microlens plate, and a pinhole layer, but the present invention is not limited to the above examples.

[0154] The first sub-optical block SOB1 may be located on at least one side of the main optical block MOB. For example, when viewed in a direction in which the user's eyes 40 look, the first sub-optical block SOB1 may be located on the right side of the main optical block MOB.

[0155] The position of the first sub-optical block SOB1 may correspond to the position of the first sub-display module SDM1. According to an embodiment, when the first sub-display module SDM1 is arranged on the first surface of the main optical block MOB, the first sub-optical block SOB1 may be located in front of the first surface of the main optical block MOB. Alternatively, when the first sub-display module SDM1 is arranged on the second surface of the main optical block MOB, the first sub-optical block SOB1 may be located in front of the second surface of the main optical block MOB.

[0156] According to an embodiment, when the first surface is the right surface of the main optical block MOB relative to the user's eye 40, the second surface may be the left surface of the main optical block MOB. Alternatively, when the first surface is the left surface of the main optical block MOB relative to the user's eye 40, the second surface may be the right surface of the main optical block MOB.

[0157] The first sub-optical block SOB1 may be provided in the form of surrounding the first sub-display module SDM1 and may shield at least a portion of light representing the first sub-image so that the first sub-image provided from the first sub-display module SDM1 is not exposed to the outside.

[0158] The first sub-optical block SOB1 may fix the position of the first optical path converter LDS1 and / or the second lens assembly LA2.

[0159] The first optical path converter LDS1 may be located on a surface within the first optical sub-block SOB1. The first optical path converter LDS1 may face the first sub-display module SDM1. Thus, the first optical path converter LDS1 may receive light from the first sub-display module SDM1. According to an embodiment, the area of ​​the first optical path converter LDS1 may be larger than the area of ​​the first sub-display module SDM1. Thus, the first optical path converter LDS1 may receive light provided from the first sub-display module SDM1 substantially without loss.

[0160] The first optical path converter LDS1 can reflect light provided from the first sub-display module SDM1. According to an embodiment, the first optical path converter LDS1 can change the path of light representing the first sub-image obtained from the first sub-display module SDM1 so as to face the second lens assembly LA2. The light representing the first sub-image can be provided to a focal position of the user's eye 40 through the first optical path converter LDS1 and the second lens assembly LA2.

[0161] The first optical path converter LDS1 can be implemented as a reflective diffraction grating. A reflective diffraction grating may refer to a member in which a material having reflective properties is provided on a surface including grooves defined with a specific period (or pattern). According to an embodiment, the reflective diffraction grating may be provided in a form in which a metal material is coated on a plate in which predetermined grooves are defined. The metal material may include aluminum (Al) or gold (Au), but is not limited to a specific material. Since the first optical path converter LDS1 is configured as a reflective diffraction grating, the loss in the intensity of the reflected light can be effectively minimized even when the incident light is bent in the desired direction.

[0162] According to an embodiment, the first optical path converter LDS1 may include a surface curvature diffraction element or a volume hologram diffraction element on a transparent material including glass, plastic, etc., or be formed by a surface curvature diffraction element or a volume hologram diffraction element on a transparent material including glass, plastic, etc.

[0163] Alternatively, the first optical path converter LDS1 may be a reflective member that is not implemented as a diffraction grating. According to an embodiment, the reflective member may be set as a mirror. In this case, although not shown in the drawings, a layer including a diffraction-type transmission element (i.e., a light-transmitting diffraction unit) may be located on the first sub-display module SDM1. The diffraction-type transmission element may refer to a diffraction grating. Even when the first optical path converter LDS1 is a reflective member that is not implemented as a diffraction grating, since the diffraction-type transmission element is provided on the first sub-display module SDM1, the reflection efficiency of the light reflected from the first optical path converter LDS1 may be improved. Here, the reflected light may be the reflected light of the first sub-image output from the first sub-display module SDM1.

[0164] The second lens assembly LA2 may be located in front of the user's eye 40. The second lens assembly LA2 may be positioned closer to the user's eye 40 than the first sub-optical block SOB1 and / or the first sub-display module SDM1.

[0165] The second lens assembly LA2 may change a path of light representing the first sub-image so that the light representing the first sub-image provided from the first sub-display module SDM1 reaches a focal point of the user's eye 40 .

[0166] The first lens assembly LA1 and the second lens assembly LA2 may be separate components, but they may be provided in a form in which at least some of them are in contact with each other, or may be implemented as a single lens assembly. However, the present invention is not limited thereto.

[0167] Figure 6 It is schematically shown Figure 5 Diagram of the area EA.

[0168] refer to Figure 6 , the display unit 20 may define an opening OPN. The opening OPN may be defined by the second lens assembly LA2 and the first sub-optical block SOB1. Alternatively, although not shown in the drawings, the opening OPN may be defined by the first lens assembly LA1 and the first sub-optical block SOB1 or a single lens assembly and the first sub-optical block SOB1.

[0169] The opening OPN can be fluidically connected to the first space 21 (refer to Figure 5 ) and the second space 27 (reference Figure 5 As used herein, "fluid connection" means that fluid can flow from one component to another, but the two components do not need to be physically connected to each other. The first space 21 may refer to an internal area through which light representing the main image provided by the main display module MDM passes. The second space 27 may refer to an internal area through which light representing the first sub-image provided by the first sub-display module SDM1 passes.

[0170] Since the opening OPN is formed, the user may not feel a sense of difference even when light representing the main image provided from the main display module MDM and light representing the first sub image provided from the first sub display module SDM1 are simultaneously provided to the user's eyes 40 .

[0171] Figure 7 : is a diagram showing the content of an image provided from the display unit of the head-mounted display device according to an embodiment of the present invention.

[0172] refer to Figure 7 The main display module MDM may include a main image area 120 in which a main image is output. The main image area 120 may be aligned with the reference image. Figure 2 The display area DA described above corresponds to the display area DA.

[0173] The main image area 120 may include a first edge image area 122. The first edge image area 122 may be located in the main image area 120. The main display module MDM may output a first edge portion image in the first edge image area 122. The first edge portion image is an edge portion of the main image output from the main image area 120.

[0174] The first edge image area 122 may mean a predetermined specific area (ie, an edge portion) of the main image area 120 .

[0175] In an embodiment, for example, the first edge image region 122 may be a rectangular region on the right side of the main image region 120. The vertical length of the first edge image region 122 may be equal to or less than the vertical length of the main image region 120. Embodiments of the first edge image region 122 according to the present invention may be provided in various ways and are not limited to the above examples.

[0176] The first edge image area 122 may be determined by the position of the first sub-display module SDM1 .

[0177] In an embodiment, for example, when the first sub-display module SDM1 is located on the right side of the main display module MDM, the first edge image area 122 may refer to an area located on the right side of the main image area 120. Alternatively, when the first sub-display module SDM1 is located on the left side of the main display module MDM, the first edge image area 122 may refer to an area located on the left side of the main image area 120.

[0178] The first sub-display module SDM1 may include a first sub-image area 220 in which a first sub-image is output. The first sub-image area 220 may include a reference image. Figure 2 The display area DA is described.

[0179] The first sub-image output from first sub-image region 220 may correspond to the first edge portion image output from first edge image region 122. The first sub-image may differ from the first edge portion image only in horizontal and / or vertical ratio and may include the same image information. Depending on the embodiment, the horizontal length of the first sub-image may be longer than the horizontal length of the first edge portion image, and the vertical length of the first sub-image may be shorter than the vertical length of the first edge portion image.

[0180] As reference Figure 5 As described, light representing the main image provided from the main display module MDM and light representing the first sub-image provided from the first sub-display module SDM1 can be provided to the user's eyes 40. Since the first sub-image is an image of an edge area of ​​the main image, the user can visually recognize the main image as an image further extending in a predetermined direction.

[0181] Hereinafter, another embodiment of the present invention will be described. However, in the following, descriptions that may overlap with the above-mentioned technical configurations and features will be omitted. The meaning of another embodiment described below should be interpreted in light of the above description.

[0182] Figure 8 is a plan view showing a display unit of a head-mounted display device according to another embodiment of the present invention.

[0183] The display unit 20 may include predetermined “sub-display modules” on the left and right sides, respectively, when viewed in a direction in which the user's eyes 40 look.

[0184] refer to Figure 8 , the display unit 20 may further include a third cover panel CP3, a second sub-display module SDM2, a second sub-optical block SOB2, a second optical path converter LDS2, and a second light collimator LP2.

[0185] The third cover panel CP3 may be located on the other surface of the main optical block MOB where the second cover panel CP2 is not located. According to an embodiment, when viewed in the direction in which the user's eyes 40 are looking, when the second cover panel CP2 is located on the right side, the third cover panel CP3 may be located on the left side surface of the main optical block MOB.

[0186] The second sub-display module SDM2 may be located on the third cover panel CP3. In this case, the second sub-display module SDM2 may refer to Figures 2 to 4 The display panel DP is described.

[0187] The second sub-display module SDM2 may output the second sub-image. In other words, the second sub-display module SDM2 may output light representing the second sub-image so that the light representing the second sub-image does not face the third lens assembly LA3.

[0188] Like the first sub-image, the second sub-image can be provided in the form of visual information including image data. Light representing the second sub-image can be provided to the second optical path converter LDS2 facing the second sub-display module SDM2. The light representing the second sub-image provided to the second optical path converter LDS2 can pass through the internal area 28 defined by the second sub-optical block SOB2 (hereinafter referred to as the third space) and can be provided to a specific point of the user's eye 40 through the third lens assembly LA3. The third space 28 can be fluidically connected to the first space 21.

[0189] The second sub-image may be an image of a predetermined edge region of the main image. The image of the predetermined edge region of the main image may be an image output from an area of ​​the main display module MDM adjacent to the second sub-display module SDM2.

[0190] The second sub image may be different from the first sub image output from the first sub display module SDM1.

[0191] For example, the first sub-image may be optical data of a predetermined area located on the right side of the main image output by the main display module MDM, but the second sub-image may mean optical data of a predetermined area located on the left side of the main image output by the main display module MDM.

[0192] Will refer to it later Figure 9 The correspondence relationship between the second sub image and the main image and the first sub image is described, and thus a detailed description thereof will be omitted.

[0193] The second light collimator LP2 may be located on one surface of the second sub display module SDM2 facing the second light path converter LDS2.

[0194] The second light collimator LP2 may change the light provided from the second sub display module SDM2 into collimated light. At least a portion of the light representing the second sub image that passes through the second light collimator LP2 may have characteristics of the collimated light.

[0195] According to an embodiment, like the first light collimator LP1 , the second light collimator LP2 may be implemented with at least one of a microlens array, a microlens plate, and a pinhole layer, but the present invention is not limited to the above examples.

[0196] The second sub-optical block SOB2 may be located on at least one side of the main optical block MOB. For example, when viewed in a direction in which the user's eyes 40 view, the second sub-optical block SOB2 may be located on the left side of the main optical block MOB.

[0197] The second sub-optical block SOB2 may be provided in the form of surrounding the second sub-display module SDM2 and may shield at least a portion of light representing the second sub-image so that the light representing the second sub-image provided from the second sub-display module SDM2 is not exposed to the outside.

[0198] The second sub-optical block SOB2 may fix the second optical path converter LDS2 and / or the third lens assembly LA3.

[0199] The second light path converter LDS2 may be located on one surface within the second sub-optical block SOB2. The second light path converter LDS2 may receive light from the second sub-display module SDM2.

[0200] The second light path converter LDS2 may reflect light provided from the second sub display module SDM2 and provide the reflected light to the third lens assembly LA3.

[0201] According to an embodiment, the second optical path converter LDS2 can change the path of the light representing the second sub-image obtained from the second sub-display module SDM2 to face the third lens assembly LA3. The light representing the second sub-image can be provided to the focus of the user's eye 40 through the second optical path converter LDS2 and the third lens assembly LA3.

[0202] With reference Figures 5 to 7Like the first optical path converter LDS1 described above, the second optical path converter LDS2 can be implemented as a reflective diffraction grating. Alternatively, the second optical path converter LDS2 can be a reflective member (e.g., a mirror) that is not implemented as a diffraction grating. In this case, the layer including the diffraction-type transmissive element can be located on the second sub-display module SDM2.

[0203] The third lens assembly LA3 may be located in front of the user's eye 40. The third lens assembly LA3 may be positioned closer to the user's eye 40 than the second sub-optical block SOB2 and / or the second sub-display module SDM2.

[0204] The third lens assembly LA3 may change a path of light representing the second sub-image so that the light representing the second sub-image provided from the second sub-display module SDM2 may reach a focus of the user's eye 40 .

[0205] The first lens assembly LA1, the second lens assembly LA2, and the third lens assembly LA3 may be separate components, but they may be provided in a form in which at least some of them are in contact with each other, or may be implemented as a single lens assembly. However, the present invention is not limited thereto.

[0206] Figure 9 is a diagram illustrating the content of an image provided from a display unit of a head-mounted display device according to another embodiment of the present invention.

[0207] refer to Figure 9 The main display module MDM may include a main image region 120 in which a main image is output. The main image region 120 may refer to a main image region 120. Figure 2 Describes the display area DA.

[0208] The main image region 120 may include a first edge image region 122 and a second edge image region 124. The first edge image region 122 and the second edge image region 124 may be located in the main image region 120.

[0209] The second edge image area 124 may mean a predetermined specific area of ​​the main image area 120 .

[0210] The second edge image area 124 may be defined by the position of the second sub-display module SDM2 .

[0211] For example, as referenced Figure 8 As described, when viewed in a direction in which the user's eyes 40 view, when the second sub display module SDM2 is located on the left side of the main optical block MOB, the second edge image area 124 may mean an area located on the left side of the main image area 120 .

[0212] The second sub-display module SDM2 may include a second sub-image area 240 in which a second sub-image is output. The second sub-image area 240 may refer to a reference image. Figure 2 Describes the display area DA.

[0213] The second sub-image output from the second sub-image area 240 may correspond to the second edge portion image output from the second edge image area 124. According to an embodiment, the second sub-image may include the same image information as the second edge portion image but may have different horizontal and / or vertical ratios.

[0214] The first sub-image outputted from the first sub-display module SDM1 may be an image of the right area of ​​the main image outputted from the main display module MDM, whereas the second sub-image outputted from the second sub-display module SDM2 may mean an image of the left area of ​​the main image outputted from the main display module MDM.

[0215] Therefore, according to this other embodiment, a user can simultaneously receive a main image, a first sub-image, and a second sub-image through the head-mounted display device (HMD). In this case, the image data provided to the user can be provided as an image extending to the right and left sides, respectively, through the first sub-image and the second sub-image. The user can visually recognize the provided image data as image data having a wide viewing angle.

[0216] In the following, reference will be made to Figure 10 A method of providing content using a head-mounted display device HMD according to an embodiment of the present invention is described.

[0217] However, the method of providing content is a method using the head mounted display device HMD according to an embodiment of the present invention, and will be referred to as needed. Figures 5 to 9 Provide a description.

[0218] Figure 10 is a flowchart illustrating a method for providing content using a head mounted display device according to an embodiment of the present invention.

[0219] refer to Figure 10 According to an embodiment of the present invention, a method for providing content using a head-mounted display device may include: outputting a main image through a main display module (S12); outputting a first sub-image through a first sub-display module (S14); providing the main image to a first lens assembly (S16); providing the first sub-image to a second lens assembly through a first optical path converter (S18); and simultaneously providing the main image and the first sub-image to a user (S19).

[0220] When outputting the main image (S12), the main image may be output from the main display module MDM. The output main image may be shielded by the main optical block MOB so that the output main image is not exposed to the outside.

[0221] When outputting the first sub-image (S14), the first sub-display module SDM1 may output the first sub-image. Figure 8 and Figure 9 ) is also included in the head-mounted display device HMD, the second sub-display module SDM2 can output the second sub-image in this step.

[0222] However, the order of outputting the main image (S12) and outputting the first sub-image (S14) is not affected by Figure 10 According to an embodiment, steps (S12) and (S14) may be performed simultaneously.

[0223] After the main image is output ( S12 ), when the main image is provided to the first lens assembly ( S16 ), the main image provided from the main display module MDM may be provided to the first lens assembly LA1 .

[0224] After the first sub-image is output (S14), when the first sub-image is provided to the second lens assembly (S18), the first sub-image provided from the first sub-display module SDM1 may be reflected by the first optical path converter LDS1 and provided to the second lens assembly LA2. In this case, as described above, the first sub-image may be an edge portion image of the main image. Although Figure 10 It is not shown in the figure, but when outputting the second sub-image is further performed, providing the second sub-image to the third lens assembly may be further performed.

[0225] After providing the main image to the first lens assembly ( S16 ) and providing the first sub-image to the second lens assembly ( S18 ) are performed, simultaneously providing the main image and the first sub-image to the user ( S19 ) may be performed.

[0226] When the main image and the first sub image are provided to the user at the same time ( S19 ), the main image and the first sub image may be provided to the user wearing the head mounted display device HMD at the same time.

[0227] Since the main image and the first sub-image that is the same as the image corresponding to the edge area of ​​the main image are simultaneously provided to the user, the user can visually recognize the image as an image extending in at least one direction.

[0228] Therefore, when the main image and the first sub image are simultaneously provided to the user (S19), the main image and the first sub image can be provided to the user at a wider viewing angle than when only the main image is provided.

[0229] According to the embodiments of the present invention, a head-mounted display device in which a viewing angle is improved and an increase in mass and volume is minimized by additionally including an auxiliary display and a reflective element, and a method of providing content using the head-mounted display device can be provided.

[0230] The effects of the present invention are not limited to the above-mentioned effects, and unmentioned effects can be clearly understood by those skilled in the art from this specification and the accompanying drawings.

[0231] The above description is merely an illustration of the technical spirit of the present invention. It will be understood by those skilled in the art that various modifications and variations may be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the above-mentioned embodiments of the present invention may be implemented individually or in combination with each other.

[0232] Therefore, the embodiments disclosed in this specification are not intended to limit the technical spirit of the present invention, but to explain the technical spirit. The scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the appended claims, and all technical spirits within the scope of their equivalents should be interpreted as included within the scope of the present invention.

Claims

1. Head-mounted display device, including: lens assembly, which changes the path of light; a main display module, outputting a main image and located in front of the lens assembly; a primary optical block that shields at least a portion of light representing the primary image so that the light representing the primary image faces the lens assembly; a sub-display module, disposed on one side of the main optical block and outputting a sub-image; a sub-optical block located on the one side of the main optical block and shielding at least a portion of light representing the sub-image; as well as An optical path converter is located in the sub-optical block and changes a path of the light representing the sub-image so that the light representing the sub-image faces the lens assembly.

2. The head-mounted display device according to claim 1, wherein The optical path converter includes a reflective diffraction grating, and The optical path converter is located in the sub-optical block to face the sub-display module, and the sub-image is provided from the sub-display module.

3. The head-mounted display device according to claim 1, wherein: The light representing the sub-image is provided to the optical path converter along a first direction and reflected from the optical path converter to be provided to the lens assembly along a second direction different from the first direction.

4. The head-mounted display device according to claim 1, wherein: The lens assembly changes the path of the light representing the main image and the path of the light representing the sub-image to provide the light representing the main image and the light representing the sub-image to a position corresponding to the focus of the user's eyes, and wherein the lens assembly is arranged to correspond to the position of the user's eyes when the user wears the head-mounted display device.

5. The head-mounted display device according to claim 1, further comprising: A light collimator is located on the sub-display module and changes the light representing the sub-image provided from the sub-display module into collimated light.

6. The head-mounted display device according to claim 1, wherein The main optical block is located between the lens assembly and the main display module.

7. The head-mounted display device according to claim 1, wherein: The sub-image corresponds to an edge portion of the main image, and The edge portion image of the main image is an image output from a local area of ​​the main display module adjacent to the sub-display module.

8. The head-mounted display device according to claim 1, wherein: The sub-display module includes a first sub-display module and a second sub-display module. Wherein, the first sub-display module is arranged on the first surface of the main optical block, and The second sub-display module is disposed on a second surface of the main optical block facing the first surface.

9. The head-mounted display device according to claim 8, wherein: The sub-image is an edge portion image of the main image, The edge portion image of the main image includes a first edge portion image and a second edge portion image. The first edge portion image corresponds to an image output from a first local area of ​​the main display module adjacent to the first sub-display module, and The second edge portion image corresponds to an image output from a second local area of ​​the main display module that is adjacent to the second sub-display module.

10. The head-mounted display device according to claim 1, wherein: The head-mounted display device defines: a first space, located between the main optical block and the lens assembly; a second space, located between the sub-optical block and the optical path converter; an opening fluidly connecting the first space and the second space; as well as A light-transmitting diffraction unit is located on the sub-display module and changes a direction of the light representing the sub-image output from the sub-display module.

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