WO2022075463A1 - ヘッドマウントディスプレイ - Google Patents
ヘッドマウントディスプレイ Download PDFInfo
- Publication number
- WO2022075463A1 WO2022075463A1 PCT/JP2021/037431 JP2021037431W WO2022075463A1 WO 2022075463 A1 WO2022075463 A1 WO 2022075463A1 JP 2021037431 W JP2021037431 W JP 2021037431W WO 2022075463 A1 WO2022075463 A1 WO 2022075463A1
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- WIPO (PCT)
- Prior art keywords
- antenna
- wiring
- pattern region
- head
- mounted display
- Prior art date
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- G06F1/1698—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone
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Definitions
- the embodiment of the present disclosure relates to a head-mounted display.
- transmissive head-mounted display (Head Mounted Display) is being developed (see, for example, Patent Document 1).
- the transmissive head-mounted display uses a technology called Augmented Reality (AR) to add various information to the actual landscape that the wearer wearing on the head sees. It is a device to do.
- AR Augmented Reality
- the head-mounted display may be equipped with an antenna or the like for communicating with an external communication device in order to obtain various information. Therefore, the weight of the head-mounted display may become heavy, and there is a demand for miniaturization and weight reduction of the head-mounted display. Further, when an antenna or the like is mounted on a head-mounted display, it is required to improve the radio wave sensitivity.
- One of the purposes of this embodiment is to provide a head-mounted display capable of improving the radio wave sensitivity while reducing the size and weight.
- the head-mounted display includes a frame and a transparent display device attached to the frame, and the display device is provided on a first base material and the first base material. It has a wiring board and a display unit provided between the first base material and the wiring board, and the wiring board is arranged on the transparent board and a plurality of wirings. It is a head-mounted display including a wiring pattern area including.
- the display device may further have a second base material provided on the wiring board and sandwiching the wiring board together with the first base material.
- the wiring pattern region and the display unit may be arranged so as to be offset from each other when viewed along the thickness direction of the substrate.
- the wiring pattern region may be provided at a position closer to the frame than the display unit.
- the wiring pattern region may have at least one of a radio wave transmission / reception function, a gesture sensing function, a wireless power feeding function, and an anti-fog function.
- a plurality of the wiring pattern regions may exist on the substrate, and each of the wiring pattern regions may have a different function.
- At least a part of the plurality of wirings may be irregularly arranged.
- the substrate may include glass or a resin film.
- the wiring board may be arranged around the wiring pattern region and further include a dummy pattern region electrically independent from the wiring.
- the wiring pattern region may have a sheet resistance value of 5 ⁇ / ⁇ or less, and the maximum width of each wiring when viewed at a viewing angle of 120 ° is 3 ⁇ m or less. It may be.
- FIG. 1 is a perspective view showing a head-mounted display according to an embodiment.
- FIG. 2 is a front view (viewing in direction II of FIG. 1) showing a head-mounted display according to an embodiment.
- FIG. 3 is a cross-sectional view (a cross-sectional view taken along line III-III of FIG. 2) showing a display device of a head-mounted display according to an embodiment.
- FIG. 4 is an enlarged plan view (enlarged view of part IV of FIG. 2) showing a wiring board.
- FIG. 5 is an enlarged plan view (enlarged view of the V portion of FIG. 4) showing a wiring board.
- FIG. 6 is a cross-sectional view showing a wiring board (VI-VI line cross-sectional view of FIG. 5).
- FIG. 7 is a cross-sectional view showing a wiring board (a cross-sectional view taken along the line VII-VII of FIG. 5).
- FIG. 8 is a cross-sectional view showing the antenna wiring and the antenna connecting wiring of the wiring board.
- FIG. 9 is a graph showing the results of simulating the relationship between the sheet resistance value and the radiation efficiency.
- FIG. 10 is a perspective view showing an antenna pattern region of the wiring board.
- FIG. 11 is a cross-sectional view showing the antenna wiring and the antenna connecting wiring of the wiring board.
- FIG. 12 is a cross-sectional view showing a wiring board (XII-XII line cross-sectional view of FIG. 5).
- FIG. 13A is a cross-sectional view showing a method of manufacturing a wiring board for a head-mounted display according to an embodiment.
- FIG. 13B is a cross-sectional view showing a method of manufacturing a wiring board for a head-mounted display according to an embodiment.
- FIG. 13C is a cross-sectional view showing a method of manufacturing a wiring board for a head-mounted display according to an embodiment.
- FIG. 13D is a cross-sectional view showing a method of manufacturing a wiring board for a head-mounted display according to an embodiment.
- FIG. 13E is a cross-sectional view showing a method of manufacturing a wiring board for a head-mounted display according to an embodiment.
- FIG. 13F is a cross-sectional view showing a method of manufacturing a wiring board for a head-mounted display according to an embodiment.
- FIG. 14 is a cross-sectional view (a diagram corresponding to FIG. 3) showing a modified example of the head-mounted display according to the embodiment.
- FIG. 15 is a front view (a diagram corresponding to FIG. 2) showing a modified example of the head-mounted display according to the embodiment.
- FIG. 16 is an enlarged plan view (a diagram corresponding to FIG. 5) showing a modified example of the head-mounted display according to the embodiment.
- FIG. 17 is a front view (a diagram corresponding to FIG. 2) showing a modified example of the head-mounted display according to the embodiment.
- FIG. 18 is a front view (a diagram corresponding to FIG. 2) showing a modified example of the head-mounted display according to the embodiment.
- FIGS. 1 to 13F are views showing the present embodiment.
- the "X direction” is a direction parallel to one side of the substrate.
- the "Y direction” is a direction perpendicular to the X direction and parallel to the other sides of the substrate.
- the “Z direction” is a direction perpendicular to both the X direction and the Y direction and parallel to the thickness direction of the wiring board.
- the "surface” is a surface on the plus side in the Z direction, and refers to a surface on which antenna wiring is provided with respect to the substrate.
- the “back surface” refers to a surface on the minus side in the Z direction, which is opposite to the surface on which the antenna wiring is provided with respect to the substrate.
- the wiring pattern area 20 is an antenna pattern area 20 having a radio wave transmission / reception function (function as an antenna)
- the wiring pattern area 20 has a radio wave transmission / reception function (as an antenna). It does not have to have a function).
- HMD head-mounted display
- the HMD according to the present embodiment is a transmission type (see-through type) HMD.
- the HMD 90 includes a frame 91 and a transparent display device 95 attached to the frame 91.
- the HMD 90 includes a display device 95 for the right eye and a display device 95 for the left eye, and is a so-called spectacle-type HMD.
- the display device 95 for the right eye and the display device 95 for the left eye have substantially the same structure.
- the display devices 95 are synchronized with each other, and are configured to display the same image on the left and right or the corresponding image on the left and right.
- the two display devices 95 may be individually controllable, and the two display devices 95 may display different images from each other.
- the HMD 90 may be a so-called goggle-type HMD provided with a single display device 95.
- the frame 91 of the HMD 90 has a rim 92 and a pair of temples 93 connected to the rim 92.
- Each display device 95 is fitted in the rim 92, respectively.
- the rim 92 is provided with a wireless communication circuit 94a of the HMD 90.
- the pair of temples 93 is provided with a control unit 94b for controlling each display device 95.
- the control unit 94b may include an image display unit (not shown) that generates image light.
- one control unit 94b is arranged in each temple 93. Then, the control unit 94b arranged in the right temple 93 controls the display device 95 for the right eye, and the control unit 94b arranged in the left temple 93 controls the display device 95 for the left eye. Has been done.
- the display device 95 As shown in FIGS. 2 and 3, the display device 95 is located between the first base material 96, the wiring board 10 provided on the first base material 96, and the first base material 96 and the wiring board 10. It has a display unit 97 provided.
- the wiring board 10 covers the entire area of the first base material 96. Although not shown, the wiring board 10 may cover only a part of the first base material 96.
- the material of the first base material 96 may be any material having transparency in the visible light region.
- a glass base material can be used.
- the first base material 96 when the HMD 90 is attached to the wearer, the first base material 96 is arranged on the side far from the wearer, and the wiring board 10 is arranged on the side closer to the wearer. There is. That is, when the HMD 90 is attached to the wearer, the wiring board 10 is arranged between the first base material 96 and the wearer. Thereby, for example, when the wearer wears the HMD 90, even if the HMD 90 comes into contact with a surrounding structure or another person, the wiring board 10 can be prevented from coming into contact with the surrounding structure or the like.
- the first base material 96 may be arranged on the side closer to the wearer, and the wiring board 10 may be arranged on the side farther from the wearer.
- the display unit 97 includes a half mirror. This half mirror is a member that superimposes the external light in front of the display device 95 and the image light from the image display unit (not shown) that generates the image light. Further, the display unit 97 is configured so that the display area of the image becomes transparent when the image is not displayed, so that the wearer can visually recognize the outside world by the light transmitted through the display unit 97. It has become. Then, the wearer can visually recognize the virtual image (image) formed by the image light while visually recognizing the outside world. In the illustrated example, the display unit 97 is provided at a position overlapping the substantially central portion of the first base material 96 in front view (see FIG. 2). However, the present invention is not limited to this, and the display unit 97 may be provided at a position overlapping any region of the first base material 96 in front view.
- the display device 95 may be a display device that projects an image by a prism or a hologram, or may be a display device that uses a transmissive liquid crystal display or the like.
- the wiring board 10 includes a transparent board 11 and an antenna pattern area (wiring pattern area) 20 arranged on the board 11. Of these, the feeding unit 40 is electrically connected to the antenna pattern region 20. Further, the wiring board 10 further includes a dummy pattern area 30 arranged around the antenna pattern area 20 on the board 11. Here, the substrate 11 will be described.
- the substrate 11 has a substantially rectangular shape (rectangular shape with rounded corners (see FIG. 2)) when viewed from the front, its longitudinal direction is parallel to the X direction, and its lateral direction is parallel to the Y direction. ing.
- the substrate 11 is transparent and has a substantially flat plate shape, and its thickness is substantially uniform as a whole.
- the shape of the substrate 11 can be appropriately selected according to the shape of the first base material 96 of the display device 95 attached to the frame 91.
- the material of the substrate 11 may be any material having transparency and electrical insulation in the visible light region.
- the substrate 11 may include glass or a resin film.
- the material of the substrate 11 is polyethylene terephthalate, but the material is not limited thereto.
- the material of the substrate 11 include polyester resins such as polyethylene terephthalate, acrylic resins such as polymethylmethacrylate, polycarbonate resins, polyimide resins, polyolefin resins such as cycloolefin polymers, and triacetyl cellulose. It is preferable to use an organic insulating material such as the cellulose-based resin material of the above. Further, as the material of the substrate 11, ceramics or the like can be appropriately selected depending on the intended use.
- the substrate 11 is not limited to this, and may have a structure in which a plurality of base materials or layers are laminated. Further, the substrate 11 may be in the form of a film or a plate. Therefore, the thickness of the substrate 11 is not particularly limited and can be appropriately selected depending on the intended use. As an example, the thickness T 1 (length in the Z direction, see FIG. 6) of the substrate 11 is, for example, 10 ⁇ m or more and 200 ⁇ m or less. Can be in the range of.
- the substrate 11 has transparency.
- “having transparency” means that the transmittance of visible light (light rays having a wavelength of 400 nm or more and 700 nm or less) is 85% or more.
- the substrate 11 may have a transmittance of visible light (light rays having a wavelength of 400 nm or more and 700 nm or less) of 85% or more, preferably 90% or more.
- the upper limit of the visible light transmittance of the substrate 11 is not particularly limited, but may be 100% or less, for example.
- the visible light means a light having a wavelength of 400 nm or more and 700 nm or less. Further, when the transmittance of visible light is 85% or more, the absorbance of the substrate 11 is measured using a known spectrophotometer (for example, a spectroscope manufactured by Nippon Spectroscopy Co., Ltd .: V-670). At that time, it means that the transmittance is 85% or more in the entire wavelength region of 400 nm or more and 700 nm or less.
- a known spectrophotometer for example, a spectroscope manufactured by Nippon Spectroscopy Co., Ltd .: V-670.
- each antenna pattern area 20 includes a telephone antenna, a WiFi antenna, a 3G antenna, a 4G antenna, an LTE antenna, a Bluetooth (registered trademark) antenna, and an NFC. It may correspond to any of antennas and the like.
- each antenna pattern area 20 has, for example, a gesture sensing function, a wireless power feeding function, an anti-fog function, a heater function, and a hovering function (the user puts the display on the display).
- Functions such as a function that can be operated without direct touch), a fingerprint authentication function, and a noise cut (shield) function may be fulfilled.
- the "gesture sensing function” means a function of detecting the relative position (distance, angle, etc.) of the object with respect to the antenna pattern region 20 and the moving speed of the object.
- the antenna pattern region 20 may perform the gesture sensing function by detecting millimeter waves.
- Each antenna pattern region 20 has a substantially rectangular shape in a plan view.
- each antenna pattern region 20 has a longitudinal direction parallel to the Y direction and a lateral direction thereof parallel to the X direction.
- the length La in the longitudinal direction (Y direction) of each antenna pattern region 20 can be selected, for example, in the range of 3 mm or more and 100 mm or less.
- the width Wa of each antenna pattern region 20 in the lateral direction (width direction) is (i) the skin depth of the antenna wiring 21 and the antenna connecting wiring 22, and (ii) the sheet resistance of the antenna pattern region 20. It can be determined in consideration of the value and (iii) the viewing angle of the antenna wiring 21 and the antenna connecting wiring 22.
- the width Wa of each antenna pattern region 20 can be selected, for example, in the range of 1 mm or more and 25 mm or less.
- the antenna pattern region 20 has metal wires formed in a grid shape or a mesh shape, respectively, and has a uniform repeating pattern in the X direction and the Y direction. That is, as shown in FIG. 5, the antenna pattern region 20 is composed of a portion extending in the X direction (a part of the antenna connecting wiring 22 described later) and a portion extending in the Y direction (a part of the antenna wiring 21 described later). It is composed of repeating the L-shaped unit pattern shape 20a (shaded portion in FIG. 5).
- each antenna pattern region 20 includes a plurality of antenna wirings (wiring) 21 having a function as an antenna, and a plurality of antenna connecting wirings 22 for connecting the plurality of antenna wirings 21.
- the plurality of antenna wirings 21 and the plurality of antenna connecting wirings 22 are integrated as a whole to form a regular grid shape or a mesh shape.
- Each antenna wiring 21 extends in a direction corresponding to the frequency band of the antenna (Y direction), and each antenna connecting wiring 22 extends in a direction orthogonal to the antenna wiring 21 (X direction).
- the antenna wiring 21 mainly exhibits a function as an antenna by having a length La (the length of the above-mentioned antenna pattern region 20) corresponding to a predetermined frequency band.
- the antenna connecting wiring 22 plays a role of suppressing a problem that the antenna wiring 21 is disconnected or the antenna wiring 21 and the feeding portion 40 are not electrically connected by connecting the antenna wirings 21 to each other. Fulfill.
- each antenna pattern region 20 a plurality of openings 23 are formed by being surrounded by antenna wiring 21 adjacent to each other and antenna connecting wiring 22 adjacent to each other. Further, the antenna wiring 21 and the antenna connecting wiring 22 are arranged at equal intervals from each other. That is, the plurality of antenna wirings 21 are arranged at equal intervals in the width direction (X direction) of the antenna pattern region 20.
- the pitch P 1 of the antenna wiring 21 takes into consideration (i) the skin depth of the antenna wiring 21, (ii) the sheet resistance value of the antenna pattern region 20, and (iii) the viewing angle of the antenna wiring 21. Can be determined. Specifically, the pitch P 1 of the antenna wiring 21 can be, for example, in the range of 0.01 mm or more and 1 mm or less.
- the pitch P 1 of the antenna wiring 21 is uniform along the width direction (X direction) of the antenna pattern region 20, but is not limited to this and may be non-uniform along the width direction (X direction).
- the plurality of antenna connecting wirings 22 are arranged at equal intervals with each other in the longitudinal direction (Y direction) of the antenna pattern region 20.
- the pitch P 2 of the antenna connecting wiring 22 has (i) the skin depth of the antenna connecting wiring 22, (ii) the sheet resistance value of the antenna pattern region 20, and (iii) the viewing angle of the antenna connecting wiring 22. It can be decided in consideration of the above. Specifically, the pitch P 2 of the antenna connecting wiring 22 can be, for example, in the range of 0.01 mm or more and 1 mm or less.
- each opening 23 has a substantially square shape in a plan view, and the transparent substrate 11 is exposed from each opening 23. Therefore, by increasing the area of each opening 23, the transparency of the wiring board 10 as a whole can be improved.
- the length L 1 of one side of each opening 23 can be, for example, in the range of 0.01 mm or more and 1 mm or less.
- the antenna wiring 21 and the antenna connecting wiring 22 are orthogonal to each other, but are not limited to this, and may intersect each other at an acute angle or an obtuse angle. Further, the shape of the opening 23 is preferably the same shape and the same size on the entire surface, but it does not have to be uniform on the entire surface such as changing depending on the location.
- each antenna wiring 21 has a substantially rectangular shape or a substantially square shape in a cross section perpendicular to the longitudinal direction (cross section in the X direction).
- the cross-sectional shape of the antenna wiring 21 is substantially uniform along the longitudinal direction (Y direction) of the antenna wiring 21.
- the shape of the cross section perpendicular to the longitudinal direction (Y direction cross section) of each antenna connecting wiring 22 is a substantially rectangular shape or a substantially square shape, and the cross section of the antenna wiring 21 described above (X direction). Cross section) It is almost the same as the shape.
- the cross-sectional shape of the antenna connecting wiring 22 is substantially uniform along the longitudinal direction (X direction) of the antenna connecting wiring 22.
- the cross-sectional shape of the antenna wiring 21 and the antenna connecting wiring 22 does not necessarily have to be a substantially rectangular shape or a substantially square shape, for example, a substantially trapezoidal shape in which the front surface side (Z direction plus side) is narrower than the back surface side (Z direction minus side). It may have a shape or a shape in which the side surfaces located on both sides in the width direction are curved.
- the line width W 1 (length in the X direction, see FIG. 6) and the height H 1 (length in the Z direction, see FIG. 6) of the antenna wiring 21 are (i) as described later. It can be determined in consideration of (ii) the skin depth of the antenna wiring 21, (ii) the sheet resistance value of the antenna pattern region 20, and (iii) the viewing angle of the antenna wiring 21.
- the line width W 1 of the antenna wiring 21 can be selected in the range of 0.1 ⁇ m or more and 5.0 ⁇ m or less
- the height H 1 of the antenna wiring 21 can be selected in the range of, for example, 0.1 ⁇ m or more and 5.0 ⁇ m or less.
- the line width W 2 (length in the Y direction, see FIG. 7) and the height H 2 (length in the Z direction, see FIG. 7) of the antenna connecting wiring 22 are (i) antennas, as will be described later. It can be determined in consideration of the skin depth of the connecting wiring 22, (ii) the sheet resistance value of the antenna pattern region 20, and (iii) the viewing angle of the antenna connecting wiring 22.
- the line width W 2 of the antenna connecting wiring 22 can be selected in the range of 0.1 ⁇ m or more and 5.0 ⁇ m or less
- the height H 2 of the antenna connecting wiring 22 can be selected in the range of, for example, 0.1 ⁇ m or more and 5.0 ⁇ m or less. You can choose.
- the material of the antenna wiring 21 and the antenna connecting wiring 22 may be any metal material having conductivity.
- the material of the antenna wiring 21 and the antenna connecting wiring 22 is copper, but the material is not limited thereto.
- metal materials including alloys
- gold, silver, copper, platinum, tin, aluminum, iron, and nickel can be used as the material of the antenna wiring 21 and the antenna connecting wiring 22.
- the mesh shape (dimensions) of the antenna wiring 21 and the antenna connecting wiring 22 of the antenna pattern region 20 is (i) the skin depth of the antenna wiring 21 and the antenna connecting wiring 22, and (ii) the antenna pattern region 20. It can be determined in consideration of the seat resistance value, (iii) the viewing angle of the antenna wiring 21 and the antenna connecting wiring 22, and the like. Hereinafter, a method for determining the mesh shape (dimensions) of such an antenna pattern region 20 will be described.
- the length (length in the Y direction) La of the antenna pattern region 20 has a length corresponding to a specific frequency band, and the corresponding frequency band is low. The higher the frequency, the longer the length La.
- the line widths W 1 and W 2 and the heights H 1 and H 2 of the antenna wiring 21 and the antenna connecting wiring 22 may be determined.
- the line widths W 1 and W 2 and the heights H 1 and H 2 of the antenna wiring 21 and the antenna connecting wiring 22 are determined so as to have dimensions that are not affected by the skin effect according to the corresponding frequency bands. You may. Specifically, in the cross section of the antenna wiring 21 and the antenna connecting wiring 22, the shorter of the heights H 1 and H 2 and the line widths W 1 and W 2 , respectively, is the antenna wiring 21 and the antenna connecting wiring 22. It may be less than twice the depth of the epidermis.
- the skin depth is the depth from the surface of the wiring that is attenuated by 1 / e (about 0.37) times the current on the surface of the wiring where the current is most likely to flow. This skin depth ⁇ can generally be calculated by the following formula.
- ⁇ is the magnetic permeability (4 ⁇ ⁇ 10-7 [H / m] in vacuum)
- ⁇ is the conductivity of the conductor constituting the wiring (in the case of copper). It means 5.8 ⁇ 10 7 [S / m]).
- the shorter of the height H 1 (H 2 ) and the line width W 1 (W 2 ) of the antenna wiring 21 (antenna connecting wiring 22) is the skin depth ⁇ 2 of the corresponding frequency. It may be double (2 ⁇ ) or less.
- the line width W 1 (W 2 ) when the line width W 1 (W 2 ) is shorter than the height H 1 (H 2 ) of the antenna wiring 21 (antenna connecting wiring 22) (W 1 ⁇ H 1 (W 2 )). ⁇ H 2 )), the line width W 1 (W 2 ) of the antenna wiring 21 (antenna connecting wiring 22) may be set to twice or less the skin depth ⁇ of the corresponding frequency (W 1 ⁇ 2 ⁇ (W 2 ⁇ ). 2 ⁇ )).
- W 1 (W 2 ) when the frequency of the antenna pattern region 20 is 2.4 GHz, W 1 (W 2 ) is 2.6 ⁇ m or less, and when the frequency of the antenna pattern region 20 is 6 GHz, W 1 (W 2 ) is 1.7 ⁇ m. It may be as follows.
- the antenna wiring 21 (antenna connecting wiring 22) can be efficiently used, and the cross-sectional area of the antenna wiring 21 (antenna connecting wiring 22) can be minimized.
- the aperture ratio A1 of the antenna pattern region 20 can be increased, and the antenna pattern region 20 can be difficult to see with the naked eye.
- the sheet resistance value of the antenna pattern region 20 may be 5 ⁇ / ⁇ or less. By setting the sheet resistance value to 5 ⁇ / ⁇ or less, the performance of the antenna pattern region 20 can be maintained. Specifically, it is possible to increase the radiation efficiency of the antenna pattern region 20 as an antenna (the ratio indicating how much power input to a single unit of the antenna pattern region 20 is radiated).
- FIG. 9 shows the result of simulating the relationship between the sheet resistance value and the radiation efficiency when the frequency corresponding to the antenna pattern region 20 as an antenna is 2.4 GHz.
- the radiation efficiency of the antenna pattern region 20 alone becomes 75% or more, and the antenna characteristics can be maintained.
- the frequency corresponding to the antenna pattern region 20 is a frequency other than 2.4 GHz, the radiation efficiency can be maintained satisfactorily by setting the sheet resistance value to 5 ⁇ / ⁇ or less.
- the radiation efficiency of the antenna pattern region 20 alone can be 75% or more, and the performance of the antenna pattern region 20 as an antenna. Can be enhanced. Further, the width Wa and the heights H 1 and H 2 of the antenna pattern region 20 can be suppressed to the minimum possible within the range satisfying the sheet resistance value. Therefore, it is possible to increase the aperture ratio A1 of the antenna pattern region 20, and it is difficult to visually recognize the antenna pattern region 20.
- the maximum width of the antenna wiring 21 and the antenna connecting wiring 22 when viewed at a viewing angle of 120 ° may be 3 ⁇ m or less.
- the antenna wiring 21 (antenna connecting wiring 22) is viewed from the direction of a predetermined line of sight LD in a cross section perpendicular to the longitudinal direction of the antenna wiring 21 (antenna connecting wiring 22).
- the width WD of the case is specified.
- the width of the longest antenna wiring 21 (antenna connecting wiring 22) when the line of sight LD is moved within a range of a viewing angle of 120 ° may be 3 ⁇ m or less.
- the viewing angle is defined as ⁇ when the angle of the normal line NL perpendicular to the surface of the substrate 11 and the line of sight LD toward the intersection O Z between the normal line NL and the surface of the substrate 11 is ⁇ .
- the width WD when viewed from the direction of the line of sight LD is when a pair of straight lines L m and L n parallel to the line of sight LD come into contact with the antenna wiring 21 (antenna connecting wiring 22) in a cross-sectional view. Refers to the distance between a pair of straight lines L m and L n .
- the viewing angle is about 120 ° at the maximum.
- the width of the antenna wiring 21 (antenna connecting wiring 22) that can be visually recognized by humans is about 3 ⁇ m at maximum. Therefore, by setting the maximum width of the antenna wiring 21 (antenna connecting wiring 22) to 3 ⁇ m or less when viewed at a viewing angle of 120 °, it is difficult for the user to recognize the antenna wiring 21 (antenna connecting wiring 22) with the naked eye. can.
- the antenna pattern region 20 and the display unit 97 are arranged so as to be offset from each other in the front view of the HMD 90 (that is, when viewed along the thickness direction of the substrate 11).
- such an antenna pattern region 20 is provided at a position that does not overlap the display unit 97 in the front view of the HMD 90. This makes it possible to improve the visibility of the display unit 97.
- the antenna pattern region 20 and the display unit 97 are arranged so as to be offset from each other, so that the performance of the antenna pattern region 20 as an antenna can be improved.
- the antenna pattern region 20 and the display unit 97 are arranged so as to be offset from each other, so that the distance between the antenna pattern region 20 and the display unit 97, which is a conductor, can be increased. Therefore, it is possible to suppress adverse effects on the transmission and reception of radio waves.
- the shortest distance D between the antenna pattern region 20 and the display unit 97 is preferably 0.1 mm or more, and more preferably 0.2 mm or more. When the shortest distance D is 0.1 mm or more, the visibility of the display unit 97 can be further improved. In addition, it is possible to effectively suppress adverse effects on the transmission and reception of radio waves, and it is possible to further enhance the performance of the antenna pattern region 20 as an antenna.
- the shortest distance D is 0.2 mm or more, the visibility of the display unit 97 can be further improved. Further, it is possible to more effectively suppress the adverse effect on the transmission and reception of radio waves, and it is possible to further improve the performance of the antenna pattern region 20 as an antenna.
- the upper limit of the shortest distance D may be appropriately set within the range in which the antenna pattern region 20 fits within the frame 91.
- the antenna pattern area 20 is provided at a position closer to the frame 91 than the display unit 97. This makes it possible to easily connect the antenna pattern region 20 to the wireless communication circuit 94a provided in the frame 91.
- the antenna pattern region 20 extends in the Y direction so as to reach the rim 92 of the frame 91 in front view of the HMD 90.
- at least a part of the antenna pattern region 20 may be provided at a position overlapping the rim 92 of the frame 91 in the front view of the HMD 90.
- the antenna pattern region 20 does not have to reach the rim 92 of the frame 91 in the front view of the HMD 90.
- the dummy pattern area 30 is provided so as to surround the periphery of each antenna pattern region 20, and the circumference of each antenna pattern region 20 excluding the feeding portion 40 side (minus side in the Y direction). It is formed so as to surround the entire direction (plus side in the X direction, minus side in the X direction, plus side in the Y direction). In this case, the dummy pattern region 30 is arranged on the substrate 11 over substantially the entire area excluding the antenna pattern region 20 and the feeding portion 40. Unlike the antenna pattern area 20, the dummy pattern area 30 does not substantially function as an antenna.
- the dummy pattern region 30 is composed of repeating dummy wirings 30a having a predetermined unit pattern shape. That is, the dummy pattern region 30 includes a plurality of dummy wirings 30a having the same shape, and each dummy wiring 30a is electrically independent from the antenna pattern region 20 (antenna wiring 21 and antenna connecting wiring 22), respectively. .. Further, the plurality of dummy wirings 30a are regularly arranged over the entire area of the dummy pattern region 30. The plurality of dummy wirings 30a are separated from each other in the plane direction and project on the substrate 11 and are arranged in an island shape.
- each dummy wiring 30a is electrically independent from the antenna pattern region 20, the feeding unit 40, and the other dummy wiring 30a.
- the dummy wiring 30a is substantially L-shaped in a plan view, and has a first dummy wiring portion 31 extending in the Y direction and a second dummy wiring portion 32 extending in the X direction.
- the first dummy wiring portion 31 has a predetermined length L 2 (length in the Y direction)
- a gap 33a (shaded portion in FIG. 5) is formed between the dummy wirings 30a adjacent to each other in the X direction, and a gap 33b (the shaded portion in FIG. 5) is formed between the dummy wirings 30a adjacent to each other in the Y direction.
- the shaded area is formed.
- the dummy wirings 30a are arranged at equal intervals from each other. That is, the dummy wirings 30a adjacent to each other in the X direction are arranged at equal intervals from each other, and the gap G1 can be, for example, in the range of 1 ⁇ m or more and 20 ⁇ m or less.
- the dummy wirings 30a adjacent to each other in the Y direction are arranged at equal intervals from each other, and the gap G 2 can be, for example, in the range of 1 ⁇ m or more and 20 ⁇ m or less.
- the maximum values of the gaps G 1 and G 2 may be 0.8 times or less the pitches P 1 and P 2 described above, respectively.
- the dummy wiring 30a has a shape in which a part of the unit pattern shape 20a of the antenna pattern region 20 described above is missing. That is, the shape of the dummy wiring 30a is a shape obtained by removing the above-mentioned gap portions 33a and 33b from the L-shaped unit pattern shape 20a of the antenna pattern region 20. That is, the shape in which the plurality of dummy wirings 30a of the dummy pattern region 30 and the plurality of gap portions 33a and 33b are merged corresponds to a grid shape or a mesh shape forming the antenna pattern region 20.
- the dummy wiring 30a of the dummy pattern region 30 has a shape in which a part of the unit pattern shape 20a of the antenna pattern region 20 is missing, so that the difference between the antenna pattern region 20 and the dummy pattern region 30 can be visually confirmed. It can be difficult to recognize, and the antenna pattern region 20 arranged on the substrate 11 can be made difficult to see.
- the antenna pattern area 20 and the dummy pattern area 30 are adjacent to each other in the Y direction.
- a first dummy wiring portion 31 is formed on an extension of the antenna wiring 21 in the vicinity of the boundary between the antenna pattern region 20 and the dummy pattern region 30. Therefore, it is difficult to visually recognize the difference between the antenna pattern area 20 and the dummy pattern area 30.
- the second dummy wiring portion 32 is formed on the extension of the antenna connecting wiring 22 for the same reason even in a place where the antenna pattern region 20 and the dummy pattern region 30 are adjacent to each other in the X direction. Is preferable.
- the first dummy wiring portion 31 of each dummy wiring 30a has a substantially rectangular or substantially square cross section (cross section in the X direction) perpendicular to the longitudinal direction (Y direction).
- the second dummy wiring portion 32 of each dummy wiring 30a has a substantially rectangular or substantially square cross section (cross section in the Y direction) perpendicular to the longitudinal direction (X direction). ..
- the cross-sectional shape of the first dummy wiring portion 31 is substantially the same as the cross-sectional shape of the antenna wiring
- the cross-sectional shape of the second dummy wiring portion 32 is substantially the same as the cross-sectional shape of the antenna connecting wiring 22.
- the line width W 3 (length in the X direction, see FIG. 12) of the first dummy wiring portion 31 is substantially the same as the line width W 1 of the antenna wiring 21, and the line width W 3 of the second dummy wiring portion 32.
- the line width W 4 (length in the Y direction, see FIG. 7) is substantially the same as the line width W 2 of the antenna connecting wiring 22.
- the height H 3 of the first dummy wiring portion 31 (length in the Z direction, see FIG. 12) and the height H 4 of the second dummy wiring portion 32 (length in the Z direction, see FIG. 7) are also provided.
- the height H 1 of the antenna wiring 21 and the height H 2 of the antenna connecting wiring 22 are substantially the same, respectively.
- the same metal material as the material of the antenna wiring 21 and the material of the antenna connecting wiring 22 can be used.
- the antenna pattern region 20 and the dummy pattern region 30 described above have predetermined aperture ratios A1 and A2, respectively.
- the aperture ratio A1 of the antenna pattern region 20 can be, for example, in the range of 85% or more and 99.9% or less.
- the aperture ratio A2 of the dummy pattern region 30 can be in the range of, for example, 87% or more and less than 100%.
- the aperture ratio A2 of the dummy pattern region 30 is larger than the aperture ratio A1 of the antenna pattern region 20 (A2> A1).
- the aperture ratio A2 of the dummy pattern region 30 may be smaller than the aperture ratio A1 of the antenna pattern region 20 (A2 ⁇ A1).
- ) between the aperture ratio A2 of the dummy pattern region 30 and the aperture ratio A1 of the antenna pattern region 20 is preferably in the range of more than 0% and 7% or less, and more than 0% and 1%. The following range is more preferable.
- the aperture ratio A3 (that is, the overall aperture ratio of the wiring board 10) of the region including the antenna pattern region 20 and the dummy pattern region 30 can be in the range of, for example, 87% or more and less than 100%. By setting the aperture ratio A3 in this range, the conductivity and transparency of the wiring board 10 can be ensured.
- the aperture ratio is an aperture area (antenna wiring 21, antenna connecting wiring 22) that occupies a unit area of a predetermined area (antenna pattern area 20, dummy pattern area 30, or antenna pattern area 20 and dummy pattern area 30). , The area ratio (%) of the area (the area where the substrate 11 is exposed without the presence of metal parts such as the dummy wiring 30a).
- the feeding unit 40 is electrically connected to the antenna pattern region 20.
- the feeding portion 40 is made of a substantially rectangular conductive thin plate-shaped member.
- the longitudinal direction of the feeding portion 40 is parallel to the X direction, and the lateral direction of the feeding portion 40 is parallel to the Y direction.
- the feeding portion 40 is arranged at the longitudinal end portion (Y direction minus side end portion) of the substrate 11.
- a metal material such as gold, silver, copper, platinum, tin, aluminum, iron, and nickel can be used.
- the power feeding unit 40 is electrically connected to the wireless communication circuit 94a (see FIG.
- the feeding unit 40 is provided at a position overlapping the rim 92 of the frame 91 in the front view of the HMD 90.
- the feeding unit 40 is provided on the surface of the substrate 11, but the present invention is not limited to this, and a part or all of the feeding unit 40 may be located outside the peripheral edge of the substrate 11.
- FIGS. 13A to 13F are cross-sectional views showing a method of manufacturing a wiring board.
- a transparent substrate 11 is prepared.
- the conductive layer 51 is formed on substantially the entire surface of the substrate 11.
- the thickness of the conductive layer 51 is 200 nm.
- the thickness of the conductive layer 51 is not limited to this, and can be appropriately selected in the range of 10 nm or more and 1000 nm or less.
- the conductive layer 51 is formed by a sputtering method using copper. As a method for forming the conductive layer 51, a plasma CVD method may be used.
- the photocurable insulating resist 52 is supplied to substantially the entire surface of the substrate 11.
- the photocurable insulating resist 52 include organic resins such as acrylic resins and epoxy resins.
- the insulating layer 54 is formed by a photolithography method.
- the photocurable insulating resist 52 is patterned by a photolithography method to form an insulating layer 54 (resist pattern) in which a trench 54a is formed.
- the trench 54a has a planar shape pattern corresponding to the antenna wiring 21, the antenna connecting wiring 22, and the dummy wiring 30a.
- the insulating layer 54 is formed so that the conductive layer 51 corresponding to the antenna wiring 21, the antenna connecting wiring 22, and the dummy wiring 30a is exposed.
- the trench 54a can be formed on the surface of the insulating layer 54 by the imprint method.
- a transparent imprint mold having a convex portion corresponding to the trench 54a is prepared, the mold and the substrate 11 are brought close to each other, and a photocurable insulating resist 52 is developed between the mold and the substrate 11. do.
- light irradiation is performed from the mold side to cure the photocurable insulating resist 52, thereby forming the insulating layer 54.
- a trench 54a having a shape in which the convex portion is transferred is formed on the surface of the insulating layer 54.
- the insulating layer 54 having the cross-sectional structure shown in FIG. 13C can be obtained.
- a residue of the insulating material may remain at the bottom of the trench 54a of the insulating layer 54. Therefore, the residue of the insulating material is removed by performing a wet treatment using a permanganate solution or N-methyl-2-pyrrolidone or a dry treatment using oxygen plasma. By removing the residue of the insulating material in this way, the trench 54a with the conductive layer 51 exposed can be formed as shown in FIG. 13C.
- the trench 54a of the insulating layer 54 is filled with the conductor 55.
- the conductive layer 51 is used as a seed layer, and the trench 54a of the insulating layer 54 is filled with copper by an electrolytic plating method.
- the insulating layer 54 is removed.
- the insulating layer 54 on the substrate 11 is removed by performing a wet treatment using a permanganate solution, N-methyl-2-pyrrolidone, an acid or an alkaline solution, or a dry treatment using oxygen plasma. do.
- the conductive layer 51 on the surface of the substrate 11 is removed.
- the conductive layer 51 is etched so that the surface of the substrate 11 is exposed by performing a wet treatment using hydrogen peroxide solution.
- the antenna pattern region 20 includes the antenna wiring 21 and the antenna connecting wiring 22
- the dummy pattern region 30 includes the dummy wiring 30a.
- the conductor 55 described above includes an antenna wiring 21, an antenna connecting wiring 22, and a dummy wiring 30a.
- the HMD 90 shown in FIG. 1 can be obtained.
- the wiring board 10 may be attached to the first base material 96 before the first base material 96 is fitted into the rim 92 of the frame 91.
- the wiring board 10 is incorporated in the HMD 90 as a component of the display device 95.
- the antenna pattern region 20 of the wiring board 10 is electrically connected to the wireless communication circuit 94a of the HMD 90 via the feeding unit 40.
- radio waves of a predetermined frequency can be transmitted and received via the antenna pattern region 20, and communication can be performed using the HMD 90. Since each dummy pattern region 30 is separated from the antenna pattern region 20 and is electrically independent, there is no possibility that the transmission and reception of radio waves will be affected by the provision of each dummy pattern region 30.
- the wiring board 10 since the wiring board 10 has a transparent board 11 and an antenna pattern region 20 arranged on the board 11 and including a plurality of antenna wirings 21, the wiring board 10 is transparent. The sex is secured. As a result, when the wiring board 10 is incorporated in the HMD 90, the outside world can be visually recognized from the opening 23 of the antenna pattern region 20, so that the visibility of the outside world is not hindered.
- the wiring board 10 includes the antenna pattern region 20 including the plurality of antenna wirings 21, it is possible to reduce the size and weight of the HMD 90 as compared with the case where the antenna is mounted on the frame 91 of the HMD 90. can. Further, since the display device 95 attached to the frame 91 has the wiring board 10, the radio wave sensitivity of the HMD 90 can be improved as compared with the case where the antenna is mounted on the frame 91 of the HMD 90.
- the antenna pattern region 20 and the display unit 97 are arranged so as to be offset from each other in the front view of the HMD 90 (that is, when viewed along the thickness direction of the substrate 11).
- the antenna pattern region 20 is provided at a position that does not overlap the display unit 97 in the front view of the HMD 90. This makes it possible to improve the visibility of the display unit 97.
- the antenna pattern region 20 and the display unit 97 are arranged so as to be offset from each other, so that the performance of the antenna pattern region 20 as an antenna can be improved. That is, since the distance between the antenna pattern region 20 and the display unit 97, which is a conductor, can be lengthened, it is possible to suppress adverse effects on the transmission and reception of radio waves.
- the antenna pattern region 20 is provided at a position closer to the frame 91 than the display unit 97. This makes it possible to easily connect the antenna pattern region 20 to the wireless communication circuit 94a provided in the frame 91.
- the wiring board 10 is arranged around the antenna pattern region 20 and further includes a dummy pattern region 30 that is electrically independent from the antenna wiring 21.
- a dummy pattern region 30 that is electrically independent from the antenna wiring 21.
- FIGS. 14 to 18 are views showing various modifications of the HMD.
- the same parts as those shown in FIGS. 1 to 13F are designated by the same reference numerals, and detailed description thereof will be omitted.
- FIG. 14 shows the HMD90A according to the first modification.
- the display device 95 may further include a second base material 98 that is provided on the wiring board 10 and sandwiches the wiring board 10 together with the first base material 96.
- the material of the second base material 98 the same material as the material of the first base material 96 can be used, and any material having transparency in the visible light region may be used.
- the display device 95 is provided on the wiring board 10, and further has the second base material 98 that sandwiches the wiring board 10 together with the first base material 96, so that the HMD 90A can be a surrounding structure or another person. It is possible to more effectively prevent the wiring board 10 from coming into contact with surrounding structures or the like even when it comes into contact with the wiring board 10. Therefore, it is possible to more effectively suppress the disconnection of the antenna wiring 21 in the antenna pattern region 20 of the wiring board 10.
- FIG. 15 shows the HMD 90B according to the second modification.
- a plurality of antenna pattern regions 20 may exist on the substrate 11, and each antenna pattern region 20 may have a different function.
- a plurality of antenna pattern regions 20 (20b to 20e) are arranged on the substrate 11.
- the longitudinal direction of a part of the antenna pattern region 20 and the longitudinal direction of the other part of the antenna pattern region 20 are oriented in different directions from each other.
- some of the antenna pattern regions 20 (20b to 20c) have their longitudinal directions parallel to the X direction or the Y direction.
- the antenna pattern area 20b may have a gesture sensing function
- the antenna pattern area 20c may have a wireless power feeding function.
- the longitudinal direction of some of the other antenna pattern regions 20 (20d) is non-parallel (inclined) with respect to the X direction and the Y direction.
- the antenna pattern region 20d may have an anti-fog function.
- a pair of antenna pattern regions 20 (20e) are arranged line-symmetrically to form a dipole antenna.
- each antenna pattern region 20 has a different function, various functions can be imparted to the HMD 90B.
- FIG. 16 shows the HMD90C according to the modified example 3.
- at least a part of the plurality of antenna wirings 21 may be irregularly arranged.
- the longitudinal direction of some antenna wiring 21 and the longitudinal direction of some other antenna wiring 21 face different directions from each other. Specifically, among the plurality of antenna wirings 21, some of the antenna wirings 21 (21a) have their longitudinal directions parallel to the Y direction. Further, the longitudinal direction of some of the other antenna wirings 21 (21b) is non-parallel (inclined) with respect to the X direction and the Y direction.
- the light reflected by the antenna wirings 21 of the wiring board 10 interferes with each other, resulting in a light beam (streak-shaped). It is possible to suppress the occurrence of (a phenomenon in which light is visually recognized).
- FIGS. 17 and 18 show the HMD90D and 90E according to the modified example 4.
- the display unit 97 is provided so as to reach the rim 92 of the frame 91 in the front view of the HMD 90D, 90E (that is, when viewed along the thickness direction of the substrate 11).
- the display unit 97 may be provided at a position overlapping the substantially central portion of the first base material 96 in the front view of the HMD 90D, and may extend along the Y direction.
- the HMD 90 may be provided with wiring (not shown) for controlling the display unit 97.
- the wiring that controls the display unit 97 may be arranged so as to extend from the display unit 97 to the outside of the display unit 97. According to this modification, even when the wiring for controlling the display unit 97 is provided in the HMD 90, the wiring can be hidden by the frame 91. Therefore, the visibility of the outside world can be improved.
- the display unit 97 may extend along the inner edge of the rim 92 of the frame 91. In the illustrated example, the display unit 97 extends in the X direction along the inner edge of the rim 92. Further, the display unit 97 may be provided at a position that does not overlap with the substantially central portion of the first base material 96 in the front view of the HMD 90E. In this case, the visibility of the outside world can be improved. Although not shown, the display unit 97 may extend in the Y direction along the inner edge of the rim 92.
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Abstract
Description
図1乃至図12を参照して、本実施の形態によるヘッドマウントディスプレイ(以下、単にHMDと記す)の構成について説明する。本実施の形態によるHMDは、透過型(シースルー型)のHMDである。
次に、図4乃至図12を参照して、表示装置95の配線基板10の構成について説明する。図4乃至図12は、配線基板10を示す図である。
基板11は、正面視で略長方形状(角部が丸められた長方形状(図2参照))であり、その長手方向がX方向に平行であり、その短手方向がY方向に平行となっている。基板11は、透明性を有するとともに略平板状であり、その厚みは全体として略均一となっている。なお、基板11の形状は、フレーム91に取り付けられる表示装置95の第1基材96の形状に合わせて適宜選択できる。
次に、アンテナパターン領域20について説明する。図4において、アンテナパターン領域20は、基板11上に複数(3つ)存在しており、それぞれ異なる周波数帯に対応している。すなわち、複数のアンテナパターン領域20は、その長さ(Y方向の長さ)Laが互いに異なっており、それぞれ特定の周波数帯に対応した長さを有している。なお、対応する周波数帯が低周波であるほどアンテナパターン領域20の長さLaが長くなっている。各アンテナパターン領域20が電波送受信機能を有する場合、各アンテナパターン領域20は、電話用アンテナ、WiFi用アンテナ、3G用アンテナ、4G用アンテナ、LTE用アンテナ、Bluetooth(登録商標)用アンテナ、NFC用アンテナ等のいずれかに対応していても良い。あるいは、各アンテナパターン領域20が電波送受信機能を有していない場合、各アンテナパターン領域20は、例えば、ジェスチャーセンシング機能、無線給電機能、曇り止め機能、ヒーター機能、ホバリング機能(使用者がディスプレイに直接触れなくても操作可能となる機能)、指紋認証機能、ノイズカット(シールド)機能等の機能を果たしても良い。ここで、本明細書中、「ジェスチャーセンシング機能」とは、アンテナパターン領域20に対する対象物の相対位置(距離、角度等)や、対象物の移動速度を検出する機能を意味する。この場合、例えば、アンテナパターン領域20は、ミリ波を検出することにより、ジェスチャーセンシング機能を果たしても良い。
上述したように、アンテナパターン領域20の長さ(Y方向の長さ)Laは、特定の周波数帯に対応した長さを有しており、対応する周波数帯が低周波であるほど長さLaが長くなる。アンテナパターン領域20の長さLaを決定した後、アンテナ配線21およびアンテナ連結配線22の線幅W1、W2および高さH1、H2を決定してもよい。
また、アンテナパターン領域20のシート抵抗値は、5Ω/□以下となっていてもよい。シート抵抗値を5Ω/□以下とすることにより、アンテナパターン領域20の性能を維持できる。具体的には、アンテナとしてのアンテナパターン領域20の放射効率(アンテナパターン領域20の単体に入力された電力がどれだけ放射されたかを示す割合)を高めることができる。
また、本実施の形態において、アンテナ配線21およびアンテナ連結配線22をそれぞれ120°の視野角で見たときの最長幅が3μm以下となっていてもよい。
次に、ダミーパターン領域30について説明する。再度図4を参照すると、ダミーパターン領域30は、各アンテナパターン領域20の周囲を取り囲むように設けられており、各アンテナパターン領域20のうち、給電部40側(Y方向マイナス側)を除く周方向全域(X方向プラス側、X方向マイナス側、Y方向プラス側)を取り囲むように形成されている。この場合、ダミーパターン領域30は、基板11上であって、アンテナパターン領域20および給電部40を除く略全域にわたって配置されている。このダミーパターン領域30は、アンテナパターン領域20とは異なり、実質的にアンテナとしての機能を果たすことはない。
次に、図13A乃至図13Fを参照して、配線基板の製造方法について説明する。図13A乃至図13Fは、配線基板の製造方法を示す断面図である。
次に、このような構成からなるHMD90の作用について述べる。
次に、図14乃至図18を参照して、HMDの各種変形例について説明する。図14乃至図18は、HMDの各種変形例を示す図である。図14乃至図18において、図1乃至図13Fに示す形態と同一部分には同一の符号を付して詳細な説明は省略する。
図14は、変形例1によるHMD90Aを示している。図14において、表示装置95は、配線基板10上に設けられ、第1基材96と共に配線基板10を挟み込む第2基材98を更に有していてもよい。第2基材98の材料としては、第1基材96の材料と同様の材料を用いることができ、可視光線領域での透明性を有する材料であればよい。
図15は、変形例2によるHMD90Bを示している。図15において、基板11上にアンテナパターン領域20が複数存在し、各々のアンテナパターン領域20が、それぞれ異なる機能を有していてもよい。
図16は、変形例3によるHMD90Cを示している。図16において、複数のアンテナ配線21は、少なくとも一部が不規則に配置されていてもよい。
図17および図18は、変形例4によるHMD90D、90Eを示している。図17および図18において、表示部97は、HMD90D、90Eの正面視において(すなわち、基板11の厚み方向に沿って見た場合に)、フレーム91のリム92まで達するように設けられている。
また、上述した実施の形態において、アンテナパターン領域20が、基板11の厚み方向に沿って見た場合に、表示部97に重ならない位置に設けられている例について説明したが、これに限られない。図示はしないが、例えば、アンテナパターン領域20が、基板11の厚み方向に沿って見た場合に、表示部97に重なっていてもよい。
さらに、上述した実施の形態において、配線基板10が、アンテナパターン領域20の周囲に配置され、アンテナ配線21から電気的に独立したダミーパターン領域30を更に含んでいる例について説明したが、これに限られない。図示はしないが、例えば、配線基板10が、アンテナ配線21から電気的に独立したダミーパターン領域30を含んでいなくてもよい。
Claims (10)
- フレームと、
前記フレームに取り付けられた透明な表示装置とを備え、
前記表示装置は、
第1基材と、
前記第1基材上に設けられた配線基板と、
前記第1基材と前記配線基板との間に設けられた表示部とを有し、
前記配線基板は、
透明性を有する基板と、
前記基板上に配置され、複数の配線を含む配線パターン領域とを含む、ヘッドマウントディスプレイ。 - 前記表示装置は、前記配線基板上に設けられ、前記第1基材と共に前記配線基板を挟み込む第2基材を更に有する、請求項1に記載のヘッドマウントディスプレイ。
- 前記基板の厚み方向に沿って見た場合に、前記配線パターン領域と前記表示部とが、互いにずれて配置されている、請求項1または2に記載のヘッドマウントディスプレイ。
- 前記配線パターン領域は、前記表示部よりも前記フレームに近い位置に設けられている、請求項1乃至3のいずれか一項に記載のヘッドマウントディスプレイ。
- 前記配線パターン領域は、電波送受信機能、ジェスチャーセンシング機能、無線給電機能および曇り止め機能のうちの少なくとも1つの機能を有する、請求項1乃至4のいずれか一項に記載のヘッドマウントディスプレイ。
- 前記基板上に前記配線パターン領域が複数存在し、各々の前記配線パターン領域は、それぞれ異なる機能を有する、請求項5に記載のヘッドマウントディスプレイ。
- 複数の前記配線は、少なくとも一部が不規則に配置されている、請求項1乃至6のいずれか一項に記載のヘッドマウントディスプレイ。
- 前記基板は、ガラスまたは樹脂フィルムを含む、請求項1乃至7のいずれか一項に記載のヘッドマウントディスプレイ。
- 前記配線基板は、前記配線パターン領域の周囲に配置され、前記配線から電気的に独立したダミーパターン領域を更に含む、請求項1乃至8のいずれか一項に記載のヘッドマウントディスプレイ。
- 前記配線パターン領域は、シート抵抗値が5Ω/□以下であり、各配線を120°の視野角で見たときの最長幅が3μm以下である、請求項1乃至9のいずれか一項に記載のヘッドマウントディスプレイ。
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EP21877762.1A EP4228249A1 (en) | 2020-10-08 | 2021-10-08 | Head-mounted display |
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US18/030,822 US20230375833A1 (en) | 2020-10-08 | 2021-10-08 | Head mounted display |
KR1020237014943A KR20230083307A (ko) | 2020-10-08 | 2021-10-08 | 헤드 마운트 디스플레이 |
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