Antenna device and display device comprising same
阅读说明:本技术 天线装置及包含其的显示装置 (Antenna device and display device comprising same ) 是由 柳汉燮 朴东必 吴伦锡 于 2020-03-31 设计创作,主要内容包括:本发明提供天线装置及包含其的显示装置,上述天线装置,包含:介电层;第一电极层,其配置于上述介电层的上表面,上述第一电极层包含辐射电极且具有第一网格结构;以及第二电极层,其配置于上述介电层的下表面,上述第二电极层具有第二网格结构。上述第一网格结构和第二网格结构在俯视图中隔着上述介电层以彼此偏置或错列的方式排列。上述天线装置可以插入或安装在显示装置的前部以提高信令灵敏度和透过率且使显示装置的图像质量的降低最小化。此外,上述天线装置可以包含由金属材料形成的网格结构以具有改善了的柔性,从而可以有效地应用于柔性显示装置。(The invention provides an antenna device and a display device comprising the same, wherein the antenna device comprises: a dielectric layer; a first electrode layer disposed on an upper surface of the dielectric layer, the first electrode layer including a radiation electrode and having a first mesh structure; and a second electrode layer disposed on a lower surface of the dielectric layer, the second electrode layer having a second mesh structure. The first lattice structure and the second lattice structure are arranged in a manner offset or staggered from each other with the dielectric layer therebetween in a plan view. The above antenna device may be inserted or mounted in a front portion of the display device to improve signaling sensitivity and transmittance and minimize degradation of image quality of the display device. Further, the above antenna device may include a mesh structure formed of a metal material to have improved flexibility, so that it may be effectively applied to a flexible display device.)
1. An antenna device, comprising:
a dielectric layer;
a first electrode layer disposed on an upper surface of the dielectric layer, the first electrode layer including a radiation electrode and having a first mesh structure; and
a second electrode layer disposed on a lower surface of the dielectric layer, the second electrode layer having a second mesh structure,
wherein the first and second mesh structures are arranged in a manner offset or staggered from each other across the dielectric layer in a top view.
2. The antenna arrangement according to claim 1, wherein the first grid structure comprises first electrode lines crossing each other to define a first cell, and the second grid structure comprises second electrode lines crossing each other to define a second cell.
3. The antenna device of claim 2, wherein the projections of the first and second cells in a top view are offset or staggered from each other such that each sub-cell formed in the projections is smaller than each first and second cell.
4. The antenna device according to claim 3, wherein the first cell and the second cell are each equally divided into a plurality of sub-cells.
5. The antenna device according to claim 3, wherein the first unit cell, the second unit cell, and the sub-cell each have a diamond shape.
6. The antenna device of claim 5, wherein the first cell and the second cell are each divided into 4 sub-cells.
7. The antenna device according to claim 1, wherein the second electrode layer is used as a ground electrode of the radiation electrode.
8. The antenna device according to claim 7, wherein the first electrode layer further includes a dummy electrode surrounding the radiation electrode, the dummy electrode being isolated from the radiation electrode.
9. The antenna device of claim 8, wherein the dummy electrode includes the first mesh structure.
10. The antenna device according to claim 9, wherein the radiation electrode and the dummy electrode completely overlap with the second electrode layer in a thickness direction.
11. The antenna device according to claim 1, wherein the second electrode layer includes a lower radiation electrode and a lower dummy electrode formed of the second mesh structure.
12. The antenna device of claim 1, further comprising:
a transmission line on an upper surface of the dielectric layer and electrically connected to the radiation electrode; and
a signal pad connected with one end of the transmission line.
13. The antenna device of claim 12, wherein the signal pad has a solid structure.
14. The antenna device of claim 12, further comprising a ground pad located on an upper surface of the dielectric layer,
wherein the ground pad is disposed around the signal pad to be isolated from the signal pad.
15. The antenna device according to claim 1, wherein the first and second electrode layers comprise silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), tin (Sn), zinc (Zn), molybdenum (Mo), calcium (Ca), or an alloy thereof.
16. A display device comprising the antenna device of any one of claims 1 to 15.
Technical Field
The invention relates to an antenna device and a display device including the same. More particularly, the present invention relates to an antenna device including an electrode pattern and a display device including the antenna device.
Background
With the development of information technology, wireless communication technology such as Wi-Fi, bluetooth, and the like is combined with a display device in a configuration such as a smart phone. In this case, the antenna may be combined with the display device to provide a communication function.
With the rapid development of mobile communication technology, antennas capable of realizing high-frequency or ultra-high-frequency communication are required in display devices. Further, in recent years, thin layer display devices having high transparency and resolution, such as transparent display devices and flexible display devices, have been developed, and antennas having improved transparency and flexibility characteristics have also been required.
The larger the screen size in the display device, the smaller the space or area of the frame portion or the light shielding portion. In this case, a space or an area for the antenna may also be limited, and thus a radiation electrode for signal transmission/reception included in the antenna may overlap with a display portion of the display device. Thus, an image of the display device may be covered by the radiation electrode of the antenna, and the radiation electrode may be visually recognized by a user, thereby degrading image quality.
In addition, in the case where the electrode included in the antenna includes a plurality of electrode lines, the electrode identification by the user may be caused due to the overlapping or misalignment of the electrode lines.
For example, korean patent application publication No. 2013-0095451 discloses an antenna integrated in a display device, but does not consider image degradation caused by the antenna in the display device.
Disclosure of Invention
According to an aspect of the present invention, there is provided an antenna apparatus with improved visual characteristics and signaling efficiency.
According to another aspect of the present invention, there is provided a display device including an antenna device having improved visual characteristics and signaling efficiency.
The above aspects of the invention will be realized by the following features and configurations:
(1) an antenna device, comprising: a dielectric layer; a first electrode layer disposed on an upper surface of the dielectric layer, the first electrode layer including a radiation electrode and having a first mesh structure; and a second electrode layer disposed on a lower surface of the dielectric layer, the second electrode layer having a second mesh structure, wherein the first and second mesh structures are arranged in a manner offset or staggered from each other with the dielectric layer therebetween in a plan view.
(2) The antenna device according to the above (1), wherein the first mesh structure includes first electrode lines that cross each other to define a first cell, and the second mesh structure includes second electrode lines that cross each other to define a second cell.
(3) The antenna device according to the above (2), wherein projections of the first unit cell and the second unit cell in a plan view are offset or staggered from each other such that each sub-cell defined in the projections is smaller than each of the first unit cell and the second unit cell.
(4) The antenna device according to the above (3), wherein each of the first cell and the second cell is equally divided into a plurality of sub-cells.
(5) The antenna device according to the above (3), wherein the first cell, the second cell, and the sub-cell each have a rhombus shape.
(6) The antenna device according to the above (5), wherein the first cell and the second cell are each divided into 4 sub-cells.
(7) The antenna device according to the above (1), wherein the second electrode layer is used as a ground electrode of the radiation electrode.
(8) The antenna device according to the above (7), wherein the first electrode layer further includes a dummy electrode surrounding the radiation electrode, the dummy electrode being isolated from the radiation electrode.
(9) The antenna device according to the above (8), wherein the dummy electrode includes the first mesh structure.
(10) The antenna device according to the above (9), wherein the radiation electrode and the dummy electrode completely overlap with the second electrode layer in a thickness direction.
(11) The antenna device according to the above (1), wherein the second electrode layer includes a lower radiation electrode and a lower dummy electrode formed of the second mesh structure.
(12) The antenna device according to the above (1), further comprising: a transmission line on the upper surface of the dielectric layer and electrically connected to the radiation electrode; and a signal pad connected to one end of the transmission line.
(13) The antenna device according to the above (12), wherein the signal pad has a solid structure.
(14) The antenna device according to the above (12), further comprising a ground pad located on an upper surface of the dielectric layer, wherein the ground pad is disposed around the signal pad so as to be isolated from the signal pad.
(15) The antenna device according to the above (1), wherein the first electrode layer and the second electrode layer include silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), tin (Sn), zinc (Zn), molybdenum (Mo), calcium (Ca), or an alloy thereof.
(16) A display device comprising the antenna device described in any one of (1) to (15) above.
The antenna device according to an exemplary embodiment of the present invention may include a radiation electrode and a ground electrode, which may include a mesh structure having a plurality of unit cells. The radiation electrode and the ground electrode may be aligned such that the cell is equally divided into sub-cells in a plan view.
Thereby, it is possible to prevent a decrease in transmittance and an increase in electrode recognition due to the overlapping of the electrode lines and an increase in electrode area caused by the misalignment of the radiation electrode and the ground electrode described above.
The above antenna device may be inserted or mounted in a front portion of the display device to improve signaling sensitivity and transmittance and minimize degradation of image quality of the display device. Further, the above antenna device may include a mesh structure formed of a metal material to have improved flexibility, so that it may be effectively applied to a flexible display device.
Drawings
Fig. 1 and 2 are a schematic cross-sectional view and a top view, respectively, illustrating an antenna device according to an exemplary embodiment.
Fig. 3 is a schematic top view illustrating a mesh structure included in a radiation electrode of an antenna device according to an exemplary embodiment.
Fig. 4 is a schematic top view illustrating a mesh structure included in a second electrode layer of an antenna device according to an exemplary embodiment.
Fig. 5 is a schematic top view illustrating a radiation electrode and a second electrode layer projected on the same plane according to an exemplary embodiment.
Fig. 6 is a schematic top view illustrating a display device according to an exemplary embodiment.
Detailed Description
According to an exemplary embodiment of the present invention, there is provided an antenna device including a radiation electrode and a ground electrode. The antenna device may have improved transmittance and signaling sensitivity, and may prevent electrode recognition.
The antenna device can be applied to high-frequency band or ultra-high frequency band (for example, 3G, 4G, 5G or higher) mobile communication equipment.
According to an exemplary embodiment of the present invention, there is provided a display device including the antenna device. The application of the antenna device is not limited to the display device, and the antenna device can be applied to various objects and structures such as automobiles, home electric appliances, buildings, and the like.
Hereinafter, the present invention is described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the embodiments described herein with reference to the drawings are provided for a further understanding of the spirit of the invention and do not limit the claimed subject matter disclosed in the detailed description and the appended claims.
Fig. 1 and 2 are a schematic cross-sectional view and a top view, respectively, illustrating an antenna device according to an exemplary embodiment.
Referring to fig. 1 and 2, an antenna device according to an exemplary embodiment may include a
The
For example, a transparent film may be used as the
In some embodiments, the
In some embodiments, the
In some embodiments, the dielectric constant of the
As shown in fig. 2, the
In some embodiments, the
The
In one embodiment, the
In an embodiment, the
In some embodiments, the
For example, the
In an exemplary embodiment, the antenna pattern or the
In some embodiments, the
The
In one embodiment, the
In some embodiments, the
The
For example, a circuit board such as a flexible circuit board (FPCB) may be bonded on the
In some embodiments, a pair of
The
As described above, the
For example, the
As above, the antenna pattern may include a mesh structure in order to improve the transmittance of the antenna device. In one embodiment, the electrode wires included in the mesh structure may be formed of a low-resistance metal such as copper, silver, APC alloy, or CuCa alloy to suppress an increase in resistance. Therefore, a transparent film antenna having low resistance and high sensitivity can be provided.
Further, the
The second electrode layer 110 may function as a ground electrode of the antenna pattern. For example, in the thickness direction of the antenna device, a capacitance or an inductance may be formed between the
In an exemplary embodiment, the second electrode layer 110 may include the above-mentioned metal or alloy, and may include a mesh structure (second mesh structure) having the same shape (e.g., the same line width and the same separation distance) as the antenna pattern or the mesh structure of the
The
For convenience of description, fig. 2 exemplifies only one antenna pattern, but a plurality of antenna patterns may be arranged in an array form on the
In some embodiments, the second electrode layer 110 may also include a radiation electrode (e.g., a lower radiation electrode) and a dummy electrode (e.g., a lower dummy electrode) as shown in fig. 2. The radiation electrode and the dummy electrode of the second electrode layer 110 described above may be formed of a second mesh structure.
In this case, the antenna device may be a double-sided radiation antenna, whereby antenna radiation can be performed from both the upper surface and the lower surface of the
Fig. 3 is a schematic top view illustrating a mesh structure included in a radiation electrode of an antenna device according to an exemplary embodiment.
Referring to fig. 3, the first mesh structure included in the
The first mesh structure may include
In an exemplary embodiment, the
Fig. 4 is a schematic top view illustrating a mesh structure included in a second electrode layer of an antenna device according to an exemplary embodiment.
Referring to fig. 4, as described above, the second electrode layer 110 may have a second mesh structure, and the second mesh structure may have substantially the same shape as the first mesh structure included in the
The second mesh structure may include second cells 65 defined by the second electrode lines 60 crossing each other in a substantially honeycomb shape, and a plurality of the second cells 65 may be aggregated to define the second mesh structure of the second electrode layer 110.
The second unit cell 65 may have a substantially diamond shape, and may have a long diagonal length D1 and a short diagonal length D2 substantially the same as the
Fig. 5 is a schematic top view illustrating a radiation electrode and a second electrode layer projected on the same plane according to an exemplary embodiment.
Referring to fig. 5, the first mesh structure included in the
In an exemplary embodiment, the second mesh structure of the second electrode layer 110 may be projected onto the first mesh structure of the
In some embodiments, the
The length of the long diagonal and the length of the short diagonal of the sub-lattice 70 may be half the length D1 of the long diagonal and the length D2 of the short diagonal of the
In some embodiments, the long diagonal of the subgrid 70 can be about 25 μm to about 200 μm in length, and the short diagonal can be about 10 μm to about 100 μm in length.
In an exemplary embodiment, the
Next, the
According to the above exemplary embodiment, the
In addition, the mesh structures included in the
Fig. 6 is a schematic top view illustrating a display device according to an exemplary embodiment. For example, fig. 6 shows the outer shape of the display device including a window.
Referring to fig. 6, the display device 200 may include a display portion 210 and a peripheral portion 220. The peripheral portion 220 may be located at, for example, both sides and/or both ends.
In some embodiments, the antenna device as described above may be embedded in a patch or film shape to the peripheral portion 220 of the display device. In some embodiments, the
The peripheral portion 220 may correspond to, for example, a light shielding portion or a frame portion of the display device 200. In addition, a driving circuit such as an IC chip of the display device 200 and/or the antenna device may be disposed in the peripheral portion 220.
The
In some embodiments, the
The above-described
Hereinafter, preferred embodiments are provided to more specifically describe the present invention. However, the following examples are only for illustrating the present invention, and it is apparent to those skilled in the art that these examples are not limited to the appended claims, and various changes and modifications can be made within the spirit and scope of the present invention. Such changes and modifications are also properly encompassed by the appended claims.
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