Wireless communication device

Abstract

To provide a cover for a display of a radio terminal capable of amplifying radio waves of an antenna that makes a direction with the display arranged a main radiation direction by suppressing a deterioration in antenna performance of the radio terminal arranged even on the display.SOLUTION: This cover for a display of a radio terminal is a cover for a display of a radio terminal arranged on the display of a radio terminal formed in the shape of a plate includes a sheet-like transparent member arranged so as to overlap on the display and formed with a transparent dielectric body with a relative dielectric constant being within the range from 1 to 10, and a plurality of conductive elements arranged on the transparent member side by side with visible light transmittance being 50% or more. The conductive elements are formed such that the length of the longest line segment longest among line segments formed on the conductive elements by connecting two optional points on the conductive elements is within the range from 0.1 times to 0.4 times of the length of effective wavelength in the dielectric body of radio waves used for radio communication by the radio terminal.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This invention relates to a cover for the display of a wireless terminal. [Background technology]

[0002] In recent years, wireless devices such as smartphones have become widely used. Various technologies have been proposed to improve the antenna performance of such wireless devices.

[0003] For example, Patent Document 1 describes an antenna device in which a circular annulus is formed by concentrically removing a metal thin film on the interior side of a window, and radio waves diffracted by passing through the annulus converge to a position where the phases are aligned, thereby increasing the energy density. Patent Document 2 describes an antenna device in which each parasitic element is fixed to a dielectric substrate so as to be positioned in the direction of radiation when viewed from a feeding element. Patent Document 3 describes an antenna for a wireless device that includes a second radiator installed on the cover of the wireless device to radiate a wireless signal emitted by a first radiator. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2002-171122 [Patent Document 2] Japanese Patent Publication No. 2017-079340 [Patent Document 3] Japanese Patent Publication No. 2017-537515 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] Wireless devices such as smartphones often use display covers to protect the screen and prevent others from peeking at it. In recent wireless devices, antenna modules are sometimes used that have their primary radiation direction directed towards the display, and the placement of a display cover may degrade the antenna performance of such wireless devices.

[0006] One aspect of disclosure technology is , A wireless system capable of amplifying radio waves from an antenna whose primary radiation direction is the direction in which the display is positioned. Communication device The purpose is to provide. [Means for solving the problem]

[0007] One aspect of the technology disclosed is wireless, such as Communication device This is illustrated by this wireless Communication device teeth, The display and the antenna, the above Among the displays, the position corresponding to the main radiation direction of the antenna mentioned above. to Along the above main radiation direction The device comprises a plurality of conductive elements arranged side by side, each having a visible light transmittance of 50% or more. The conductive elements are any The length of the longest line segment formed on the conductive element connecting the two points is the length of the longest line segment. Radiated by the antenna The above display It is formed to be within a range of 0.1 to 0.4 times the effective wavelength length within the structure. [Effects of the Invention]

[0008] The display cover for this wireless terminal suppresses the degradation of the wireless terminal's antenna performance even when placed on the display, and can amplify the radio waves of the antenna whose primary radiation direction is the direction in which the display is placed. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 shows an example of a display cover for a smartphone according to an embodiment. [Figure 2]FIG. 2 is a diagram showing an example of a state in which a smartphone provided with a display cover according to an embodiment is viewed from the front side. [Figure 3] FIG. 3 is a diagram schematically showing the positional relationship between a conductor element provided in a display cover according to an embodiment and an antenna of the display cover. [Figure 4] FIG. 4 is a first diagram for explaining each parameter used in the first simulation. [Figure 5] FIG. 5 is a second diagram for explaining each parameter used in the first simulation. [Figure 6] FIG. 6 is a diagram illustrating the result of the second simulation. [Figure 7] FIG. 7 is a diagram showing an example of a display cover according to the first modification. [Figure 8] FIG. 8 is a first diagram showing variations in the positional relationship between a conductor element and a patch antenna in the first modification. [Figure 9] FIG. 9 is a second diagram showing variations in the positional relationship between a conductor element and a patch antenna in the first modification. [Figure 10] FIG. 10 is a third diagram showing variations in the positional relationship between a conductor element and a patch antenna in the first modification. [Figure 11] FIG. 11 is a fourth diagram showing variations in the positional relationship between a conductor element and a patch antenna in the first modification. [Figure 12] FIG. 12 is a first diagram illustrating the arrangement of conductor elements adopting a shape other than a rectangle. [Figure 13] FIG. 13 is a second diagram illustrating the arrangement of conductor elements adopting a shape other than a rectangle. [Figure 14] FIG. 14 is a third diagram illustrating the arrangement of conductor elements adopting a shape other than a rectangle. [Figure 15] FIG. 15 is a fourth diagram illustrating the arrangement of conductor elements adopting a shape other than a rectangle. [Figure 16] FIG. 16 is a diagram illustrating an arrangement pattern of conductor elements. [Figure 17] Figure 17 shows an example of a display cover with a protruding portion. [Figure 18] Figure 18 illustrates a display cover with a protruding portion attached to a smartphone. [Modes for carrying out the invention]

[0010] <Embodiment> The configurations of the embodiments shown below are illustrative, and the disclosed technology is not limited to the configurations of the embodiments. A display cover for a wireless terminal according to the embodiment has, for example, the following configuration. The display cover for a wireless terminal according to this embodiment is a display cover for a wireless terminal that is placed on a plate-shaped display of a wireless terminal. The display cover for the wireless terminal is arranged to overlap with the display and comprises a sheet-like transparent member made of a transparent dielectric material having a relative permittivity in the range of 1 to 10, and a plurality of conductor elements having a visible light transmittance of 50% or more, arranged side by side on the transparent member. The conductor elements are formed such that the length of the longest line segment formed on the conductor element by connecting any two points on the conductor element is in the range of 0.1 to 0.4 times the length of the effective wavelength of the radio waves used by the wireless terminal for wireless communication within the dielectric material.

[0011] With such a display cover for a wireless terminal, the conductive element can be made to act as a resonator for the antenna of the wireless terminal, which has its main radiation direction pointed towards the display. Furthermore, in this wireless terminal cover, multiple conductive elements are arranged in a row, thus maximizing the possibility of positioning the conductive elements near the antenna. In other words, this wireless terminal display cover increases the possibility of the conductive elements acting as resonators, and consequently, improves the operating gain of the wireless terminal's antenna by allowing the conductive elements to act as resonators. Moreover, the conductive elements of this wireless terminal display cover have a visible light transmittance of 50% or more. Therefore, even when this wireless terminal display cover is placed on a display, it is possible to reduce user discomfort with the display's appearance.

[0012] Hereinafter, an embodiment in which the above-mentioned wireless terminal display cover is applied to a smartphone display cover will be further described with reference to the drawings. Figure 1 is a diagram showing an example of a smartphone display cover 100 according to the embodiment. The display cover 100 is a member that is placed on the display of a smartphone and protects the display. The display cover 100 comprises a sheet portion 101 formed in a sheet shape (plate shape) and four conductive elements 120 arranged on the sheet portion 101. In Figure 1, the sheet portion 101 is formed in a rectangular shape, but the shape of the sheet portion 101 can be appropriately determined according to the shape of the smartphone display to be protected. Also, in Figure 1, four conductive elements 120 are arranged in a row, but the number of conductive elements 120 is not limited to four.

[0013] The sheet portion 101 is a transparent sheet-like material. Here, "transparent" means, for example, that the transmittance of visible light is 50% or more. The sheet portion 101 is formed of a dielectric material, for example, with a relative permittivity of about 1 to 10 and a thickness of about 0.1 to 0.5 mm. Examples of such dielectric materials include polyethylene terephthalate (PET), thermoplastic polyurethane (TPU), and optical glass.

[0014] The sheet portion 101 is a component that is placed on the display of a smartphone to be protected by the display cover 100 so as to cover the display of the smartphone. The sheet portion 101 is formed in a substantially rectangular plate shape to match the shape of the display of the smartphone to be protected by the display cover 100. The sheet portion 101 protects the display by being placed, for example, so as to overlap with the display of the smartphone.

[0015] The conductive element 120 is a transparent element made by processing a conductor such as a metal into a thin plate. The conductive element 120 can also be described as a thin film made of metal. Examples of metals that can form the conductive element 120 include gold (Au), silver (Ag), copper (Cu), indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), and zinc oxide (AZO). The conductive element 120 can be made transparent by, for example, making such a metal into a thin film with a thickness of 30 nm or less, or by processing it into a mesh.

[0016] The conductor element 120 is positioned in a location corresponding to the antenna module of the smartphone protected by the display cover 100, with its main radiation direction facing the display. The size of the conductor element 120 is determined according to the wavelength of the radio waves used for wireless communication by the smartphone housed in the smartphone cover 100 and the dielectric constant of the dielectric forming the sheet portion 101 of the display cover 100. For example, the effective wavelength of the radio waves of the smartphone, taking into account the wavelength shortening caused by the dielectric forming the sheet portion 101 and the glass and casing of the smartphone, is λ. g Therefore, the length of the diagonal is 0.1λ g from 0.4λ g A plate-shaped polygon, or a polygon with a diameter of 0.1λ g from 0.4λ g It is a disk. Also, the pitch spacing between adjacent conductor elements 120 is 0.5λ g It is preferable to do so.

[0017] For example, when the smartphone protected by the display cover 100 performs wireless communication using radio waves in the millimeter wave band (radio frequency from 24 to 300 GHz), the effective wavelength λ in the sheet portion 101 selected from materials with a relative dielectric constant in the range of 1 to 10 can be determined by the following formula (1). g

Equation

[0018] In the above formula (1), c is the speed of light, f is the frequency, and ε r is the relative dielectric constant. According to formula (1), the effective wavelength λ g is 0.32 mm or more and 12.5 mm or less. Therefore, when the smartphone performs wireless communication using radio waves in the millimeter wave band, the conductor element 120 can be a plate-shaped polygon with a diagonal length of 0.032 to 5 mm or a disc with a diameter length of 0.032 to 5 mm. Also, the pitch interval between adjacent conductor elements 120 is preferably within the range of 0.16 to 6.25 mm. The diagonal length (or diameter) and pitch interval of the conductor element 12 determined as described above do not operate the conductor element 120 as an antenna radiator, but operate the conductor element 120 as a resonator.

[0019] FIG. 2 is a diagram showing an example of a state of viewing the smartphone 500 provided with the display cover 100 according to the embodiment from the front side. The smartphone 500 is formed in a rectangular plate shape as a whole. A display 513 is provided on the front surface of the smartphone 500. The smartphone 500 can be said to be a smartphone on which the display cover 100 is arranged on the display 513.

[0020] ​Figure 2 illustrates the positions of the antennas implemented in the smartphone 500 with dotted lines. The smartphone 500 is equipped with five millimeter-wave antenna modules 501, 502, 503, 504, and 505. The millimeter-wave antenna modules 501, 502, 503, 504, and 505 are antennas that perform wireless communication using radio waves in the millimeter-wave band.

[0021] Each of the millimeter-wave antenna modules 501, 502, 503, 504, and 505 is a four-element patch array antenna having four patch antennas 530. Millimeter-wave antenna modules 501 and 503 are installed on the side 512 forming the short side of the smartphone 500 so that the direction of radio wave transmission and reception is oriented. Millimeter-wave antenna module 502 is installed on the side 511 forming the long side of the smartphone 500 so that the direction of radio wave transmission and reception is oriented. Millimeter-wave antenna module 504 is installed on the bottom surface of the smartphone 500 so that the direction of radio wave transmission and reception is oriented. Millimeter-wave antenna module 505 is installed so that the direction of radio wave transmission and reception is oriented towards the display 513 of the smartphone 500.

[0022] In the display cover 100, the conductive element 120 is placed on a sheet portion 101 that is physically and structurally separated from the millimeter-wave antenna modules 501, 502, 503, 504, and 505 to which the power supply lines of the smartphone 500 are connected. The display cover 100 is designed so that the conductive element 120 acts as a resonator in response to radio waves radiated from the millimeter-wave antenna modules 501, 502, 503, 504, and 505. Since the conductive element 120 operates without receiving power from the smartphone 500 via a physical connection, it can also be called a powerless element.

[0023] Figure 3 is a schematic diagram showing the positional relationship between the conductive element provided on the display cover 100 according to the embodiment and the antenna of the display cover 100. Figure 3(A) is a side view of the millimeter-wave antenna module 505 and the conductive element 120, and Figure 3(B) is a front view of the millimeter-wave antenna module 505 and the conductive element 120. In Figure 3(B), the millimeter-wave antenna module 505 and the millimeter-wave antenna module are not visible in the front view. The patch antenna 530 provided on the rod 505 is shown as an example with a dotted line.

[0024] The display cover 100 and the display 513 of the smartphone 500 are detachably attached, for example, by double-sided tape 110 provided on the back of the sheet portion 101. Multiple conductive elements 120 are arranged in a row on the sheet portion 101 of the display cover 100, at positions corresponding to the patch antennas 530 of the millimeter-wave antenna module 505 of the smartphone 500, which have their main radiation direction directed toward the display 513. Therefore, when the display cover 100 is placed on the display 513 of the smartphone 500, each conductive element 120 is positioned in the direction from which radio waves are emitted by each of the patch antennas 530 provided on the millimeter-wave antenna module 505. In Figure 3, the conductive elements 120 and the patch antennas 530 are arranged to overlap so that their centers coincide when viewed from the front, but the centers of the conductive elements 120 and the patch antennas 530 may be offset from each other when viewed from the front.

[0025] The patch antenna 530 has an effective wavelength λ g It resonates with the radio waves. Therefore, as shown in Figure 3, the conductor element 120 located near the direction of emission of the radio waves from the patch antenna 530 acts as a resonator (a so-called stacked patch). By the conductor element 120 acting as a stacked patch, the display cover 100 can improve the operating gain of the millimeter-wave antenna module 505 of the smartphone 500.

[0026] <Simulation> We conducted simulations to verify the effectiveness of the display cover 100, and the results are explained below.

[0027] (First Simulation) In the first simulation, the effect of the display cover 100 was verified by varying the thickness of the sheet portion 101 and the length of the diagonal of the conductive element 120 as parameters.

[0028] Figures 4 and 5 illustrate the parameters used in the first simulation. In Figure 4, the thickness t1 of the sheet portion 101, the thickness t2 of the double-sided tape 110, the thickness t3 of the display 513, the distance t4 between the display 513 and the millimeter-wave antenna module 505, and the thickness t4 of the substrate of the millimeter-wave antenna module 505 are exemplified. In Figure 5, the length S of the diagonal (longest line segment) of the conductor element 120 is exemplified.

[0029] In the first simulation, the thickness t2 of the double-sided tape 110 is set to 0.05 mm, the thickness t3 of the display 513 is set to 0.7 mm, the distance t4 between the display 513 and the millimeter-wave antenna module 505 is set to 0.23 mm, and the thickness t4 of the substrate of the millimeter-wave antenna module 505 is set to 0.27 mm. In addition, the relative permittivity of the sheet portion 101 is set to 6.8, the relative permittivity of the double-sided tape 110 is set to 3.0, the relative permittivity of the display 513 is set to 6.8, and the relative permittivity of the substrate of the millimeter-wave antenna module 505 is set to 12.0. Furthermore, in the first simulation, the thickness t1 of the sheet portion 101 is varied in the range of 0.1 mm to 1.0 mm, and the length of the longest line segment S of the conductor element 120 is varied in the range of 0.28 mm to 5.0 mm.

[0030] The results of the first simulation are illustrated in Table 1 below. Table 1 below illustrates the gain (dBi) of the patch antenna 530 when the thickness t1 of the sheet portion 101 and the length of the longest line segment S of the conductor element 120 are varied. Table 1 below also illustrates the case where the conductor element 120 is not provided (corresponding to a value of 0 mm in Table 1). Note that when the display cover 100 is not provided on the display 513 (the sheet portion 101 and conductor element 120 are absent), the gain of the patch antenna 530 was 9.54 dBi. [Table 1]

[0031] Conventional protective covers for displays have a thickness of 0.15 mm to 0.33 mm, with those around 0.2 mm thick being the most commonly used. Referring to Table 1 above, for example, when t1 is 0.1 mm, the patch antenna 530 gain is improved in the range of S from 0.56 to 3.78 mm; when t1 is 0.2 mm, the S is improved in the range of 0.56 to 3.43 mm; and when t1 is 0.3 mm, the S is improved in the range of 1.33 to 3.43 mm compared to when the display cover 100 is not provided on the display 513 or when only the sheet portion 101 is provided on the display 513. Furthermore, it can be seen from Table 1 above that the maximum gain of 10.69 dBi was achieved when t1 was 0.1 mm and S was 3.08 mm.

[0032] (Second Simulation) In the second simulation, the gain of the patch antenna 530 was verified when the conductivity and thickness of the conductor element 120 were varied. Figure 6 illustrates the results of the second simulation. In Figure 6, the vertical axis illustrates the operating gain of the patch antenna 530, and the horizontal axis illustrates the conductivity of the conductor element 120. In the second simulation, the thickness of the conductor element 120 was set to 400 nm, 40 nm, 4 nm, 2.2 nm, 0.4 nm, and 1.0 nm, and the gain of the patch antenna 530 was verified. In Figure 6, the operating gain of the patch antenna 530 without the conductor element 120 is illustrated by the straight line L.

[0033] Referring to Figure 6, it can be seen that the operating gain of the patch antenna 530 is improved when the conductor element 120 is provided compared to when it is not provided. Here, it can be seen that if the conductivity of the conductor element 120 is less than 5.8e+3S / m, the effect of amplifying the gain of the patch antenna 530 decreases sharply. Therefore, it is preferable that the conductivity of the conductor element 120 be 5.8e+3S / m or higher. Also, referring to Figure 6, it can be seen that if the thickness of the conductor element 120 is too thin, the effect of amplifying the patch antenna 530 decreases. Therefore, it is preferable that the thickness of the conductor element 120 be 1 nm or more.

[0034] <Effects of the Embodiment> When a display cover is placed on the display 513 of a smartphone 500, the operating gain of the display 513, which has its radio wave emission direction directed towards the display 513, may decrease. This problem becomes particularly noticeable in smartphones compatible with 5G, which utilizes millimeter-wave radio waves.

[0035] In this embodiment, by arranging the conductive element 120 on the display cover 100 and operating the conductive element 120 as a stacked patch which is an unpowered element, it is possible to suppress a decrease in the operating gain of the smartphone 500 even when the display cover is placed on the display 513 of the smartphone 500.

[0036] In this embodiment, the shape of the conductor element 120 is optimized for millimeter-wave radio waves. That is, one side of the rectangular conductor element 120 is 0.1λ. g from 0.4λ g By setting the diameter to (0.032 to 5 mm), the conductive element 120 can be made to operate as a resonator suitable for millimeter-wave radio waves. As a result, according to this embodiment, an improvement in the operating gain of the smartphone 500 in which the display cover 100 is placed on the display 513 can be expected.

[0037] Furthermore, in this embodiment, the conductive element 120 is positioned in the sheet portion 101 at a location corresponding to the millimeter-wave antenna module 505 of the smartphone 500. By positioning the conductive element 120 in this manner, it becomes easier to position the conductive element 120 in a location favorable for amplifying the operating gain of the patch antenna 530 provided on the millimeter-wave antenna module 505.

[0038] <First variation> Figure 7 shows an example of a display cover 100a according to the first modified example. In this embodiment, the pitch spacing of the conductor elements 120 was set to 0.5λg (0.16 to 6.25 mm), but the pitch spacing of the conductor elements 120 is not limited to equal intervals. As illustrated in Figure 7, the conductor elements 120 may be arranged unevenly within the above interval (0.16 to 6.25 mm). Among the unevenly arranged conductor elements 120, a set of conductor elements 120 arranged at a first pitch spacing is an example of a "set of conductor elements arranged at a first pitch spacing". Among the unevenly arranged conductor elements 120, a set of conductor elements 120 arranged at a second pitch spacing is an example of a "set of conductor elements arranged at a second pitch spacing". It is preferable that both the first and second pitch spacings are selected from within the range of 0.5λg (0.16 to 6.25 mm).

[0039] Figures 8 to 11 show variations in the positional relationship between the conductor element 120 and the patch antenna 530 in the first modified example. Figures 8 to 11 are front views of the area around the conductor element 120 with the display cover 100a placed on the display 513. In Figures 8 to 11, the number of conductor elements 120 placed on the sheet portion 101 is also varied. In the display cover 100a, multiple conductor elements 120 are placed in positions where there is a high probability that the millimeter-wave antenna module 505 is present. Therefore, there is a high probability that one of the placed conductor elements 120 will be positioned in front of or near the patch antenna 530 provided on the millimeter-wave antenna module 505. For this reason, even in the first modified example, an improvement in the operating gain of the display cover 100a can be expected. In addition, the number of conductor elements 120 and the number of patch antennas 530 may be the same or different.

[0040] In the embodiment and the first modification, the distance between the multiple conductor elements 120 arranged in a row is optimized for millimeter-wave radio waves. That is, the pitch spacing of the conductor elements 120 is set to 0.5λ g By setting the diameter to (0.16 to 6.25 mm), even if a misalignment occurs between the conductor element 120 and the patch antenna 530 provided by the millimeter-wave antenna module 505 of the smartphone 500, the conductor element 120 can be made to function as a resonator suitable for millimeter-wave radio waves.

[0041] <Other variations> In this embodiment, the shape of the conductor element 120 is rectangular, but the shape of the conductor element 120 is not limited to a rectangle. The conductor element 120 may be circular or a polygon other than a rectangle. Figures 12 to 15 illustrate the arrangement of conductor elements 120 with shapes other than rectangles. Also, in Figures 12 to 15, the conductor elements 120 are arranged in multiple rows rather than a single row. Figure 12 illustrates an elliptical conductor element 120. When the conductor element 120 is elliptical, its major axis is 0.1λ g from 0.4λ g(It should be between 0.032 and 5 mm). Also, if the conductor element 120 is perfectly circular, its diameter should be 0.1λ. g from 0.4 λ g (It should be between 0.032 and 5 mm)

[0042] Furthermore, Figure 13 illustrates a conductor element 120 formed in the shape of a pentagon, and Figure 14 illustrates a conductor element 120 formed in the shape of a rectangle. When the conductor element 120 is a polygon including a rectangle, the longest line segment among its sides or diagonals is 0.1λ. g from 0.4λ g (0.032 to 5 mm) is sufficient. That is, the conductor element 120 is formed in a plate shape, and its shape in front view can be formed in various ways. And, for the conductor element 120 formed in various shapes, the length of the longest line segment (also called the longest line segment) formed on the conductor element 120 by connecting any two points on the conductor element 120 is 0.1λ g from 0.4λ g (It should be between 0.032 and 5 mm)

[0043] Figure 15 illustrates a configuration in which conductive elements of various shapes are arranged. As illustrated in Figure 15, the display cover 100 may have a mixture of circular and elliptical conductive elements 120 and polygonal conductive elements 120. In other words, the display cover 100 may have multiple conductive elements 120 of different shapes. Furthermore, the conductive elements 120 may be arranged in multiple rows in the display cover 100.

[0044] Figure 16 illustrates arrangement patterns of the conductive elements 120. In Figure 16, the double-sided tape 110 is not shown. Figure 16(A) illustrates a state in which the conductive elements 120 are arranged on the outer surface of the sheet portion 101 (the side opposite to the display 513). Figure 16(B) illustrates a state in which the outer surface of the sheet portion 101 is etched and the conductive elements 120 are arranged on the etched portion. Figure 16(C) illustrates a state in which the inner surface of the sheet portion 101 (the side facing the display 513) is etched and the conductive elements 120 are arranged on the etched portion. Figure 16(D) illustrates a state in which three conductive elements 120 are arranged in a line in the thickness direction of the sheet portion 101.

[0045] As illustrated in Figures 16(A) to 16(C), the conductor element 120 may be provided on the surface of the sheet portion 101, or the surface of the sheet portion 101 may be etched (removed) and the conductor element 120 may be embedded. Furthermore, the thickness direction of the sheet portion 101 in the display cover 100 substantially coincides with the direction in which the patch antenna 530 of the millimeter-wave antenna module 503 emits radio waves. Therefore, as illustrated in Figure 16(D), the operating gain of the patch antenna 530 can be further improved by arranging the conductor elements 120 in a line in the thickness direction of the sheet portion 101. Note that in Figure 16(D), three conductor elements 120 are arranged in a line in the thickness direction of the sheet portion 101, but two conductor elements 120 may be arranged in a line, or four or more conductor elements 120 may be arranged in a line.

[0046] Furthermore, the display cover 100 may also include a protrusion positioned on the side of the smartphone 500. Figure 17 shows an example of a display cover 100b with a protrusion 130. The protrusion 130 is formed to protrude from the long side of the sheet portion 101 in the direction of the short side of the sheet portion 101. Conductor elements 120 are positioned on the protrusion 130 at locations corresponding to the patch antenna 530 of the millimeter-wave antenna module 502, which is provided on the side 511 of the smartphone 500 so that the direction of radio wave transmission and reception is oriented. When the display cover 100b is attached to the smartphone 500, the protrusion 130 is folded along the fold line 131 and positioned on the side of the smartphone 500. The conductor elements 120 positioned on the protrusion 130 are an example of an "additional conductor element".

[0047] Figure 18 illustrates a display cover 100b with a protrusion 130 attached to a smartphone 500. In Figure 18, the display 513 of the smartphone 500 is shown facing upwards. When the display cover 100 is attached to the smartphone 500, the protrusion 130 is positioned on the side 511 of the smartphone 500. It is positioned such that the conductive element 120 on the protrusion 130 is located at a position corresponding to the patch antenna 530 of the millimeter-wave antenna module 502, thereby improving the operating gain of the patch antenna 530 of the millimeter-wave antenna module 502 with the display cover 100b.

[0048] The embodiments and variations disclosed above can be combined in any way. [Explanation of Symbols]

[0049] 100-inch display cover 100a ·· Display cover 100b · Display cover 101. Seat section 110 Double-sided tape 120 Conductor element 130...Protrusion 131 ··Folding line 500 · Smartphone 501 Millimeter-wave antenna module 502 mm wave antenna module 503 Millimeter-wave antenna module 504 mm wave antenna module 505 mm wave antenna module 530 Patch Antenna 511 ··Side 512 ··Side 513 ··Display

Claims

1. The display and Antenna and, The display comprises a plurality of conductive elements arranged in a line along the main radiation direction at a position where the main radiation direction of the antenna is directed, and having a visible light transmittance of 50% or more. The conductor element is formed such that the length of the longest line segment formed on the conductor element by connecting any two points on the conductor element is within the range of 0.1 to 0.4 times the effective wavelength of the radio waves radiated by the antenna within the display. Wireless communication device.

2. The casing and The antenna housed within the aforementioned enclosure, The housing comprises a plurality of conductive elements, the plurality of conductive elements arranged in a line along the main radiation direction at a position where the main radiation direction of the antenna is directed, The conductor element is formed such that the length of the longest line segment formed on the conductor element by connecting any two points on the conductor element is within the range of 0.1 to 0.4 times the effective wavelength of the radio waves radiated by the antenna within the housing. Wireless communication device.

3. The plurality of conductive elements include conductive elements that are formed in a polygonal shape when viewed from the front. The longest line segment is the length of one side of the polygonal conducting element, or the longest line segment among the diagonals of the polygonal conducting element. The wireless communication device according to claim 1 or 2.

4. The plurality of conductive elements include conductive elements that are formed in a circular shape when viewed from the front. The longest line segment is the diameter of the circularly formed conductor element. A wireless communication device according to any one of claims 1 to 3.

5. The plurality of conductive elements are arranged at equal intervals. A wireless communication device according to any one of claims 1 to 4.

6. The plurality of conductor elements include a set of conductor elements in which adjacent conductor elements are arranged at a first pitch interval, and a set of conductor elements in which adjacent conductor elements are arranged at a second pitch interval different from the first pitch interval. A wireless communication device according to any one of claims 1 to 5.

7. The plurality of conductive elements are formed from one or more metals selected from the group consisting of gold (Au), silver (Ag), copper (Cu), indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), and zinc oxide (AZO). A wireless communication device according to any one of claims 1 to 6.

8. The plurality of conductor elements are such that the pitch spacing between adjacent conductor elements is 0.5 times the effective wavelength. The wireless communication device according to claim 5.

9. The aforementioned radio waves are in the millimeter wave band. The pitch interval is within the range of 0.16 mm to 6.25 mm. The wireless communication device according to claim 8.

10. The aforementioned radio waves are in the millimeter wave band. The length of the longest line segment is in the range of 0.032 mm to 5 mm. A wireless communication device according to any one of claims 1 to 9.

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