CN113381182B - Coupling feed antenna, manufacturing method thereof and display device - Google Patents
Coupling feed antenna, manufacturing method thereof and display device Download PDFInfo
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- CN113381182B CN113381182B CN202110636418.1A CN202110636418A CN113381182B CN 113381182 B CN113381182 B CN 113381182B CN 202110636418 A CN202110636418 A CN 202110636418A CN 113381182 B CN113381182 B CN 113381182B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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Abstract
The invention provides a coupling feed antenna, a manufacturing method thereof and a display device, wherein the coupling feed antenna comprises the following components: the radiation layer is attached to one side of the packaging layer of the display panel; the feeder line is attached to one side of the substrate layer of the display panel; and a gap for coupling and feeding between the radiation layer and the feeder line is formed in a first metal layer in the display panel. Through the on-screen coupling feed antenna structure, the antenna process is simplified without connecting through a transmission line, coupling feed is carried out through the gap formed by the first metal layer in the display panel, loss in the signal transmission process is greatly reduced, and the antenna bandwidth is wide.
Description
Technical Field
The invention relates to the technical field of display, in particular to a coupled feed antenna, a manufacturing method thereof and a display device.
Background
At present, a display device develops towards a narrow frame and a full screen, the space of the frame of the display device, which can be used for mounting an antenna, is smaller and smaller, and the development of a curved screen limits the placement of the antenna in a side area; folding and rolling screen handsets make transmission of antenna radiation signals at the back of the display device difficult.
The development of wireless communication technology inevitably requires the number of antennas provided in a display device to increase, and particularly, with the development of 5G technology, the number of high-frequency antennas used for millimeter wave signal transmission/reception needs to increase more, and an array design is implemented to meet the requirements of high gain and wide frequency band.
In the related art, the problem of placing a full-screen antenna can be solved through a scheme of integrating an antenna and a display device, but the existing scheme of integrating the antenna and the display device has the disadvantages of complex process, large transmission line loss and narrow antenna bandwidth.
Disclosure of Invention
The invention provides a coupling feed antenna, a manufacturing method thereof and a display device, and at least solves the problems of complex process, large transmission line loss and narrow antenna bandwidth of the existing antenna and display device integration scheme.
In a first aspect, an embodiment of the present invention provides a coupled feed antenna for a display panel, including:
the radiation layer is attached to one side of the packaging layer of the display panel;
the feeder line is attached to one side of the substrate layer of the display panel;
and a gap for coupling and feeding between the radiation layer and the feeder line is formed in the first metal layer in the display panel.
In some embodiments, the material of the radiation layer is a non-transparent conductive material or a transparent conductive material;
when the radiation layer is made of a non-transparent conductive material, a through hole is formed in the radiation layer so as to expose a pixel of the light emitting layer below the radiation layer.
In some embodiments, when the material of the radiation layer is a non-transparent conductive material, a shielding layer is disposed on a surface of the radiation layer away from the encapsulation layer to shield the radiation layer.
In some embodiments, the first metal layer includes one of a gate layer, a source metal layer, an anode metal layer, a cathode metal layer, and a touch layer.
In some embodiments, the radiation layer is attached to one side of the packaging layer of the display panel through a first adhesive layer; the feeder line is attached to one side of the substrate layer of the display panel through a second adhesive layer.
In some embodiments, the film layer between the radiation layer and the first metal layer constitutes a first dielectric layer, and the film layer between the feed line and the first metal layer constitutes a second dielectric layer;
the dielectric constant of the first dielectric layer is not more than a first threshold value, the thickness of the first glue layer is 20-100 mu m, and the dielectric constant of the second dielectric layer is higher than a second threshold value.
In some embodiments, the length of the radiating layer is determined according to the antenna frequency, the antenna equivalent dielectric constant and the equivalent radiating slot length, and the width of the radiating layer is determined according to the antenna frequency and the dielectric constant of the first dielectric layer.
In a second aspect, an embodiment of the present invention provides a method for manufacturing a coupled feed antenna, including:
providing a display panel, wherein a first metal layer of the display panel is provided with a gap for coupling feed between a radiation layer and a feeder line;
attaching a radiation layer to one side of the packaging layer of the display panel; and
and attaching the feeder line to one side of the substrate layer of the display panel.
In some embodiments, when the material of the radiation layer is a non-transparent conductive material, patterning the radiation layer, and forming through holes in the radiation layer to expose pixels of the light emitting layer below the radiation layer;
and covering a shielding layer on the surface of one side of the radiation layer, which is far away from the packaging layer, so as to shield the radiation layer.
In some embodiments, the method further comprises:
providing a flexible circuit board, wherein the flexible circuit board is provided with a circuit matched with the impedance of the coupling feed antenna;
and connecting the feeder line with the input port of the flexible circuit board by adopting a back binding process.
In some embodiments, when there are a plurality of coupled feed antennas, the flexible circuit board has a plurality of input ports, and the feed line of each coupled feed antenna is connected to the corresponding input port of the flexible circuit board by using a back-bonding process, so as to form a coupled feed antenna array.
In some embodiments, attaching a radiation layer to the encapsulation layer side of the display panel includes:
attaching a radiation layer to a frame region on one side of the packaging layer of the display panel;
the laminating feeder in display panel's stratum basale one side includes:
and a feeder line is attached to a frame area on one side of the substrate layer of the display panel, and the radiation layer corresponds to the feeder line in the thickness direction of the display panel.
In some embodiments, one side of the radiation layer is attached to the outside of the bezel region, or attached to a position spaced apart from the outside of the bezel region.
In some embodiments, the feed line is led out from the outer side of the frame region to the side of the frame region close to the display region; or
The feeder line is led out from one side of the frame area, which is close to the display area, to the outer side of the frame area.
In some embodiments, attaching a radiation layer to the encapsulation layer side of the display panel includes:
attaching a radiation layer to a display area on one side of an encapsulation layer of the display panel;
the laminating feeder in display panel's stratum basale one side includes:
and a feeder line is attached to a display area on one side of the substrate layer of the display panel, and the radiation layer corresponds to the feeder line in the thickness direction of the display panel.
In a third aspect, an embodiment of the present invention provides a display device, including:
the coupled feed antenna of the first aspect, or the coupled feed antenna manufactured by the method of the second aspect; and
and a gap for coupling feed between the radiation layer and the feeder line is formed in the first metal layer of the display panel.
Compared with the prior art, one or more embodiments of the invention have at least the following beneficial effects:
according to the coupled feed antenna provided by the invention, the radiation layer is attached to one side of the packaging layer of the display panel, and the feeder line is attached to one side of the substrate layer of the display panel; the first metal layer in the display panel is provided with a gap for coupling feed between the radiation layer and the feeder line, through the on-screen coupling feed antenna structure, connection through a transmission line is not needed, the antenna process is simplified, coupling feed is carried out through the gap formed by the first metal layer in the display panel, loss in the signal transmission process is greatly reduced, and the antenna bandwidth is wide.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1A is an overall schematic diagram of a coupled feed antenna structure according to an embodiment of the present invention;
fig. 1B is an exploded view of a coupled feed antenna according to an embodiment of the present invention;
fig. 2 is a schematic top view of a coupled feed antenna provided in an embodiment of the present invention;
FIG. 3A is a schematic view of a radiation layer pattern provided by an embodiment of the present invention;
FIG. 3B is a schematic cross-sectional view of a radiation layer provided by an embodiment of the invention;
fig. 4A is a schematic diagram illustrating a first coupled feed antenna according to an embodiment of the present invention;
fig. 4B is a schematic diagram of a first coupled feed antenna according to an embodiment of the present invention
Fig. 5A is a schematic diagram illustrating a second coupled feed antenna according to an embodiment of the present invention;
fig. 5B is a schematic diagram illustrating a second coupled feed antenna according to an embodiment of the present invention;
fig. 6A is a schematic diagram illustrating a third coupled feeding antenna according to an embodiment of the present invention;
fig. 6B is a schematic diagram illustrating a third coupled feeding antenna according to an embodiment of the present invention;
in the figure, 1-radiation layer, 2-feeder line, 3-display panel, 31-first metal layer, 32-film layer part above the first metal layer, 33-film layer part below the first metal layer, 34-gap, 4-first glue layer, 5-second glue layer, 35-luminous layer, 36-packaging layer, 37-back plate, 6-OCA layer, 7-shielding layer, 8-glass cover plate, 9-antenna area, 10-binding area, 11-flexible circuit board and 11 a-input port.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The antenna and the display device are integrated to solve the problem of placing the overall screen antenna, in the related technology, the technology of arranging the antenna on the screen mainly utilizes an inner touch layer or an outer touch layer of an OLED display panel to form a radiation layer of a microstrip patch antenna, the OLED display panel is used as an antenna dielectric layer, and a metal layer in the OLED display panel is used as the ground or is externally connected with a metal layer and is connected with the ground through a transmission line.
The performance of the antenna is tested by a simulation test, and the following simulation results can be obtained: the antenna gain of the OLED display panel is-8 dB under the condition that the metal aperture ratio is 20%, and the antenna gain of the OLED display panel is 3.2dB under the condition that the metal layer is not arranged. It is known that the metal layer has a large influence on the antenna performance, resulting in a large attenuation of the gain, and that the loss increases as the distance of the transmission line increases when the metal layer is present in the antenna dielectric layer.
Thus, the above-described on-screen antenna technology has at least the following problems:
(1) The metal layer in the OLED display panel can block the oscillation of electromagnetic waves in the antenna dielectric layer (i.e., the OLED display panel);
(2) The antenna dielectric layer and the ground need to be connected in a complex electric mode, and the antenna process is difficult;
(3) Due to the limitation of the thickness of the antenna dielectric layer, the transmission line loss is large, and the antenna bandwidth is narrow.
Therefore, embodiments of the present invention provide a coupled feed antenna, a method for manufacturing the coupled feed antenna, and a display device, and a detailed description will be given below with reference to several embodiments.
Example one
Fig. 1A to 1B show a coupled feed antenna structure, and as shown in fig. 1A to 1B, the present embodiment provides a coupled feed antenna including:
a radiation layer 1 attached to one side of the encapsulation layer of the display panel 3;
the feeder 2 is attached to one side of the substrate layer of the display panel 3;
the first metal layer 31 in the display panel 3 is opened with a slot 34 for coupling and feeding between the radiation layer 1 and the feeding line 2, wherein the first metal layer 31 serves as a common ground plane.
Preferably, the display panel 3 is an OLED display panel, the first Metal layer 31 includes one of a Gate layer (Gate), a source Metal layer (SD layer), an Anode Metal layer (Anode), a Cathode Metal layer (Cathode), and a touch layer (e.g., FMLOC Metal), and coupling power feeding is implemented by using any one of the Metal layers in the display panel 3 as the first Metal layer 31 with the gap 34.
The coupling feed antenna in this embodiment is an on-screen coupling feed antenna structure, and forms a microstrip antenna by attaching the radiation layer 1 to one side of the encapsulation layer of the display panel 3 and attaching the feeder 2 to one side of the substrate layer (PI layer) of the display panel 3, where the radiation layer 1 corresponds to the feeder 2 in the thickness direction of the display panel 3, and the feeder 2 is electromagnetically coupled to the radiation layer 1 through the slot aperture on the first metal layer 31 to form radiation, thereby implementing contactless coupling feed.
In practical application, the radiation layer 1 is attached to one side of the packaging layer of the display panel 3 through the first adhesive layer 4; the feeder 2 is attached to one side of the substrate layer of the display panel 3 through a second adhesive layer 5; the first adhesive layer 4 and the second adhesive layer 5 are conductive adhesive layers, such as OCA adhesive and PSA. The coupling feed antenna in this embodiment is an on-screen coupling feed antenna structure, the radiation layer 1 is attached to one side of the encapsulation layer of the display panel 3 through the first adhesive layer 4, the feeder 2 is attached to one side of the substrate layer (PI layer) of the display panel 3 through the second adhesive layer 5, a microstrip antenna is formed, the radiation layer 1 corresponds to the feeder 2 in the thickness direction of the display panel 3, so that coupling feed is performed through the gap 34, and non-contact coupling feed of the antenna is achieved.
In practical applications, the material of the radiation layer 1 may be a non-transparent conductive material or a transparent conductive material.
In one case, the material of the radiation layer 1 is a non-transparent conductive material, and the non-transparent conductive material is a metal material with high conductivity, such as Cu, ag, al, MO, and the like. Fig. 3A shows a schematic diagram of a radiation layer pattern, and fig. 3B shows a schematic diagram of a cross section of a radiation layer, the radiation layer 3 is attached to one side of the encapsulation layer 36 of the display panel 3 through the first adhesive layer 4, and the radiation layer 1 is located above the encapsulation layer 36 of the display panel 3 and below the Glass Cover plate 8 (CG, cover Glass). Since the radiation layer 1 is located above the display area (AA area), and the emission layer 35 (EL emission layer) located above the Back Plate (BP) 37 requires the radiation layer 1 to have high transmittance, the radiation layer 1 above the emission layer 35 (EL emission layer) is perforated and patterned to avoid blocking each pixel in the emission layer 35, as shown in fig. 3A and 3B, when the radiation layer 1 is made of a non-transparent conductive material, through holes are formed in the radiation layer 1 to expose the pixels of the emission layer 35 below the radiation layer 1, and a grid pattern for wiring while avoiding the pixels of the emission layer 35 is formed.
Further, when the radiation layer 1 is made of a non-transparent conductive material, the radiation layer 1 above the encapsulation layer 36 may be shielded to ensure that the pattern of the radiation layer 1 of the coupling feed antenna is not visible. Therefore, as a preferable mode, the shielding layer 7 is provided on the surface of the radiation layer 1 on the side away from the sealing layer 36, the pattern of the shielding layer 7 is the same as that of the radiation layer 1 to shield the radiation layer 1, the OCA layer 6 is covered above the radiation layer 1 and the shielding layer 7, and the glass cover plate 8 is attached. In practical application, other areas on the same layer as the radiation layer 1 can be shielded by the shielding layer, so that the whole layer of display effect is uniform. In practical applications, the shielding layer 7 may be a Black Matrix (BM).
In other cases, the material of the radiation layer 1 is a transparent conductive material, and the transparent conductive material is a metal material with high transmittance, such as ITO. By using a material having a high transmittance, the pattern of the radiation layer 1 can be made invisible. Furthermore, a whole metal layer made of a high-transmittance material can be used, so that the radiation layer 1 and other regions of the same layer are made of transparent conductive materials, and the whole display effect is uniform.
In practical applications, the material of the feeding line 2 may be a non-transparent conductive material, and the non-transparent conductive material is a metal material with high conductivity, such as Cu, ag, al, MO, and the like, but is not limited to the non-transparent conductive material, and the feeding line 2 is implemented on the substrate layer side of the display panel 3 by patterning.
In the coupled feed antenna of the present embodiment, the film layer between the radiation layer 1 and the first metal layer 31 constitutes a first dielectric layer, and the film layer between the feed line 2 and the first metal layer 31 constitutes a second dielectric layer. It can be understood that the first metal layer 31 divides each film layer in the display panel 3 into two parts, including the film layer part 32 above the first metal layer 31 and the film layer part 33 below the first metal layer 31, the film layer part 32 above the first metal layer 31 and the first glue layer 4 constitute a first dielectric layer, the film layer part 33 below the first metal layer 31 and the second glue layer 5 constitute a second dielectric layer, the first dielectric layer serves as a substrate of the coupling feed antenna, and the first metal layer 31 serves as a ground layer of the coupling feed antenna, so that the on-screen coupling feed antenna of the present embodiment can perform coupling feed through the radiation layer 1 and the feed line 2, and thus, the transmission of antenna signals is achieved.
In practical application, the feeder 2 is electromagnetically coupled to the radiation layer 1 through the aperture of the slot on the first metal layer 31 to form radiation, and the lower dielectric constant is favorable for radiation, so that the first dielectric layer needs to be made of a material with a low dielectric constant and a thicker thickness to effectively reduce the quality factor Q value of the coupled feed antenna; the higher dielectric constant is beneficial to confining the electromagnetic field in the feed, so that the bandwidth of the antenna can be obviously increased, and therefore, the second dielectric layer needs to be made of a material with a high dielectric constant and a thinner thickness, so that radiation from the feed line is effectively reduced, and the bandwidth of the antenna is increased. Thus, in some cases, the first dielectric layer and the second dielectric layer should satisfy certain conditions including:
(1) The dielectric constant of the first dielectric layer does not exceed a first threshold, for example, the first threshold is 5, the thickness of the first adhesive layer 4 is 20 μm to 100 μm, and the first adhesive layer may be made of an adhesive material with a low dielectric constant and a dielectric loss as small as possible.
(2) The dielectric constant of the second dielectric layer is higher than the second threshold, for example, the second threshold is 5, and since the second dielectric layer can effectively utilize the backplane of the OLED display panel (the backplane has a larger dielectric constant), a glue material as thin as possible can be selected.
Fig. 2 shows a schematic top view of a coupled feed antenna, in order to realize the coupled feed effect of the coupled feed antenna, in practical application, the cross section of the radiation layer 1 is rectangular, and the length L of the rectangle is according to the antenna frequency f and the equivalent dielectric constant epsilon of the antenna e And equivalent spokesThe length of the radiating gap is determined, and the equivalent dielectric constant of the antenna is determined e According to the dielectric constant epsilon of the first dielectric layer r The width W of the rectangle and the thickness h of the first dielectric layer are determined, and the equivalent radiation gap length Delta L is determined according to the equivalent dielectric constant epsilon of the antenna e The width W of the rectangle and the thickness h of the first medium layer.
Preferably, the length L of the rectangle may be determined according to a first calculation:
the first calculation formula:
wherein c represents the speed of light;
the width W of the rectangle is determined by the antenna frequency f and the dielectric constant epsilon of the first dielectric layer r Determining, preferably, may be determined according to a second calculation:
the second calculation formula: :
equivalent dielectric constant epsilon of antenna e May be determined according to a third calculation:
the third calculation formula:
wherein h represents the thickness of the first dielectric layer.
The equivalent radiation gap length Δ L may be determined according to a fourth calculation equation:
it should be understood that the present embodiment is not limited to the above manner of determining the length L and the width W of the rectangular cross section of the radiation layer 1. The feed line 2 extends out of the radiation layer 1 along the length of the radiation layer 1 to be connected to an input port of a flexible circuit board for supplying signals. Width W of gap 34 s Preferably 1/2 of the width W of the rectangular cross-section of the radiation layer 1, the size of the gap 34 being variedThe energy coupled to the resonant cavity of the radiation layer 1 can be adjusted, the length Ls of the slot 34 is used for adjusting the impedance matching of the antenna, and the specific value is obtained by optimizing through electromagnetic simulation software in practical application. Since the current is largest in the center of the radiating layer 1 (radiating patch), it is preferable that the center of the slot 34 is at the same vertical position as the center of the radiating layer 1, so that the electromagnetic energy coupled to the radiating layer 1 through the slot is maximized, and the feeder 2 is perpendicular to the direction of the connecting line of the center of the slot 34 and the center of the radiating layer 1, so as to obtain the maximum degree of coupling.
Compared with a microstrip antenna adopting a traditional feed mode (such as an axis, a coplanar waveguide and a microstrip line), the coupling feed antenna of the embodiment does not need to be electrically connected in the OLED display panel through a transmission line, the coupling feed frequency band is wider, meanwhile, the problem of attenuation of a metal layer in the OLED display panel to the antenna gain is solved, the metal layer in the OLED display panel is provided with a gap and then is used as a part of the antenna, the antenna process/structure is simplified, and the bandwidth of the antenna is improved.
Example two
The embodiment provides a method for manufacturing a coupled feed antenna, which includes:
providing a display panel, wherein a first metal layer of the display panel is provided with a gap for coupling feed between a radiation layer and a feeder line;
attaching a radiation layer to one side of an encapsulation layer of the display panel; and
and attaching the feeder line to one side of the substrate layer of the display panel.
In practical application, the display panel 3 with the gap on the first metal layer is manufactured, the coupling feed antenna is attached, and the flexible circuit board is manufactured and connected with the feeder 2 of the coupling feed antenna. When the display panel 3 is manufactured, a gap 34 is formed in the first metal layer 31 of the display panel 3, the position and the width of the gap 34 can be determined in advance by using a simulation test according to the required antenna frequency, so that the impedance matching between the radiation layer 1 and the feeder 2 is adjusted through the gap 34, the radiation layer 1 is attached to one side of the packaging layer of the display panel 3 through the first adhesive layer 4, the feeder 2 is attached to one side of the substrate layer of the display panel 3 through the second adhesive layer 5, and therefore an on-screen coupling feed antenna structure is formed, the radiation layer 1 corresponds to the feeder 2 in the thickness direction of the display panel 3, coupling feeding is performed through the gap 34, and non-contact coupling feeding of the antenna is achieved.
In practical applications, the material of the radiation layer 1 may be a non-transparent conductive material or a transparent conductive material.
In one case, the material of the radiation layer 1 is a non-transparent conductive material, and the non-transparent conductive material is a metal material with high conductivity, such as Cu, ag, al, MO, and the like. When the material of the radiation layer 1 is a non-transparent conductive material, the radiation layer 1 is patterned, and through holes are formed in the radiation layer 1 to expose pixels of the light emitting layer below the radiation layer 1, that is, to perform mesh wiring in the gaps between the pixels. In this case, in order to ensure that the pattern of the radiation layer 1 of the coupling feed antenna is not visible, a shielding layer 7 is covered on the surface of the radiation layer 1 on the side far away from the encapsulation layer, and the pattern of the shielding layer 7 is the same as that of the radiation layer 1 so as to shield the radiation layer 1.
In practical application, other areas on the same layer as the radiation layer 1 can be shielded by using a black matrix, so that the display effect of the whole layer is uniform.
In other cases, the material of the radiation layer 1 is a transparent conductive material, and the transparent conductive material is a metal material with high transmittance, such as ITO. In this case, the radiation layer 1 is attached to the encapsulation layer side of the display panel 1 through the first adhesive layer 4, and the radiation layer 1 of the transparent conductive material is attached to the encapsulation layer side of the display panel 1 through the first adhesive layer 4. By using a metal layer of a transparent conductive material with high transmittance, the pattern of the radiation layer 1 can be made invisible. Furthermore, a whole metal layer of a transparent conductive material with high transmittance can be used, so that the radiation layer 1 and other areas of the same layer are made of the transparent conductive material, and the whole display effect is uniform.
In order to receive and transmit signals, the coupling feed antenna needs to be connected with a Circuit matched with impedance, so that a Circuit matched with the impedance of the coupling feed antenna is manufactured on one side of a substrate layer of the display panel 3 through a Flexible Printed Circuit (FPC) and is bound with a feed line of the coupling feed antenna, so that signals of an IC can be transmitted to the coupling feed antenna through the Flexible Circuit board to receive and transmit signals, the matching Circuit is manufactured on the Flexible Circuit board, the microstrip antenna of the coupling feed can also form an array structure, and each input port on the Flexible Circuit board is respectively connected with the feed line 2 of each corresponding antenna through a back binding process. Therefore, the method further comprises:
providing a flexible circuit board, wherein the flexible circuit board is provided with a circuit matched with the impedance of the coupling feed antenna; and
and connecting the feeder 2 with an input Port (PIN) of the flexible circuit board by adopting a back binding process.
In practical application, the coupled feed antennas are implemented in an array form in an OLED display product, so that when there are a plurality of coupled feed antennas, the flexible circuit board correspondingly has a plurality of input ports, the feed line of each coupled feed antenna is connected with the corresponding input port of the flexible circuit board by adopting a back binding process, that is, a coupled feed antenna array is formed, and the plurality of coupled feed antennas can simultaneously operate through the circuit on the flexible circuit board, so as to implement synchronous signal receiving and transmitting. The coupled feed antenna (array) may be fabricated in the frame region or in the display region.
In some cases, the radiation layer is attached to the encapsulation layer side of the display panel 3 by a first adhesive layer, including:
attaching a radiation layer to a frame region on one side of the packaging layer of the display panel 3;
accordingly, the feeder line is attached to the substrate layer side of the display panel 3, and the feeder line includes:
the feeder line is attached to a frame area on one side of the substrate layer of the display panel 3, and the radiation layer 1 corresponds to the feeder line 2 in the thickness direction of the display panel.
In practical applications, one side of the radiation layer 1 is attached to the outside of the frame region, or attached to a position spaced apart from the outside of the frame region. The feeder 2 is led out from the outer side of the frame area to the side of the frame area close to the display area, or the feeder 2 is led out from the side of the frame area close to the display area to the outer side of the frame area.
Fig. 4A to 4B show first schematic diagrams of manufacturing a coupled feed antenna, where fig. 4A and 4B are schematic diagrams of manufacturing a coupled feed antenna on a front side (a packaging layer side) of a display panel and a back side (a substrate layer side) of the display panel, respectively, an antenna area 9 shown by a dotted line in fig. 4A is attached with four radiation layers 1, that is, a coupled feed antenna array formed by four coupled feed antennas is shown in fig. 4A, the antenna area 9 is located in a frame area on the packaging layer side of the display panel 3, and one side of the radiation layers 1 of the four coupled feed antennas is attached at a position having a certain interval with an outer side of the frame area, correspondingly, a binding area 10 shown by a dotted line in fig. 4B is used for binding a feed line 2 with a flexible circuit board 11, a circuit matched with an impedance of the coupled feed antenna is manufactured on the flexible circuit board 11, and input ports 11a having the same number as the coupled feed antennas in the coupled feed antenna array are provided, for facilitating alignment, the feed line 2 is led out from the side of the frame area close to the outer side of the frame area, each coupled feed antenna and the input ports 2 are bound to the back side of the flexible feed antenna array, therefore, the circuit board 11, the method does not involve a high yield of the method.
Fig. 5A to 5B show schematic diagrams of a second type of coupled feed antenna manufacturing, where fig. 5A and 5B are schematic diagrams of coupled feed antenna manufacturing on a front side (package layer side) of a display panel and a back side (substrate layer side) of the display panel, respectively, an antenna area 9 shown by a dotted line in fig. 5A is attached with four radiation layers 1, that is, a coupled feed antenna array formed by the four coupled feed antennas is shown in fig. 5A, the antenna area 9 is located in a frame area on the package layer side of the display panel 3, and one side of the radiation layer 1 is attached to an outer side of the frame area, correspondingly, a binding area 10 shown by a dotted line in fig. 5B is used for binding a feed line 2 and a flexible circuit board 11, a circuit matched with impedance of the coupled feed antennas is manufactured on the flexible circuit board 11, and input ports 11a are provided in the same number as the coupled feed antennas in the coupled feed antenna array, the feed line 2 is led out from the outer side of the frame area to the side of the display area, and the feed line 2 of each coupled feed antenna and the corresponding input port 11a on the flexible circuit board 11 are bound by a back process. Because the frame region does not have the metal wiring region of the back plate, the dielectric constant is lower, the radiation layer 1 is close to the outer side of the frame region as far as possible, the characteristic that the metal wiring region of the frame region without the back plate can be fully utilized, and the first dielectric layer can obtain the lower dielectric constant.
In other cases, the coupling feeding antenna may be fabricated in the display area, so that the radiation layer is attached to the encapsulation layer side of the display panel, including: attaching a radiation layer to a display area on one side of an encapsulation layer of the display panel; laminating feeder on display panel's stratum basale one side includes: the feeder line is attached to a display area on one side of the substrate layer of the display panel, and the radiation layer corresponds to the feeder line in the thickness direction of the display panel.
Fig. 6A to 6B show schematic diagrams of a third manufacturing method of a coupled feed antenna, where fig. 6A and 6B are schematic diagrams of a manufacturing method of a coupled feed antenna on a front side (a package layer side) of a display panel and a back side (a substrate layer side) of the display panel, respectively, an antenna area 9 shown by a dotted line in fig. 6A is attached with four radiation layers 1, that is, a coupled feed antenna array formed by four coupled feed antennas is shown in fig. 6A, the antenna area 9 is located in a display area on the package layer side of the display panel 3, correspondingly, a bonding area 10 shown by a dotted line in fig. 6B is used for bonding a feed line 2 with a flexible circuit board 11, a circuit matched with an impedance of the coupled feed antenna is manufactured on the flexible circuit board 11, and input ports 11a are provided in an amount identical to the number of the coupled feed antennas in the coupled feed antenna array, and the feed line 2 can be led out from a side close to a side far from a frame area of the display area to a side far from the frame area in the bonding area 10, so as to bond the feed line 2 of each coupled feed antenna with the corresponding input port 11a back side of the flexible circuit board 11 by a bonding process. The coupling feed does not need to be electrically connected, the available space is large, the array of multiple antennas can be realized, and the microstrip antenna of the coupling feed can form an array structure by manufacturing the matching circuit on the flexible circuit board.
EXAMPLE III
The present embodiment provides a display device including:
the coupled feed antenna of the first embodiment, or the coupled feed antenna manufactured by the method of the second embodiment;
in the display panel 3, a gap 34 for coupling and feeding between the radiation layer 1 and the feeder 2 is formed in the first metal layer 31 of the display panel 3.
In practical applications, the display panel 3 may be an OLED display panel, and the display device is an OLED display product, and preferably, may be an OLED mobile display device, but is not limited thereto. The display device integrated with the coupling feed antenna of the first embodiment or manufactured by the method of the second embodiment can effectively solve the problems of narrow antenna bandwidth and large transmission loss of a display product on the basis of meeting the requirement of placing the comprehensive screen antenna, has simple process and realizes the effects of high gain and wide frequency band of the antenna.
In the embodiments provided in the present invention, it should be understood that the disclosed system and method can be implemented in other ways. The system and method embodiments described above are merely illustrative.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (15)
1. A coupled feed antenna for a display panel, comprising:
the radiation layer is attached to one side of the packaging layer of the display panel through a first adhesive layer;
the feeder line is attached to one side of the substrate layer of the display panel through a second adhesive layer;
a first metal layer in the display panel is provided with a gap for coupling feed between the radiation layer and the feeder line;
the film layer between the radiation layer and the first metal layer forms a first dielectric layer, the first dielectric layer is used as a substrate of the coupling feed antenna, the film layer between the feeder line and the first metal layer forms a second dielectric layer, the first dielectric layer is made of a material with a low dielectric constant, the second dielectric layer is made of a material with a high dielectric constant, the dielectric constant of the first dielectric layer is not more than a first threshold value, and the dielectric constant of the second dielectric layer is higher than a second threshold value.
2. The coupled feed antenna of claim 1, wherein the material of the radiation layer is a non-transparent conductive material or a transparent conductive material;
when the radiation layer is made of a non-transparent conductive material, a through hole is formed in the radiation layer to expose a pixel of the light emitting layer below the radiation layer.
3. The coupled feed antenna of claim 2, wherein when the radiation layer is made of a non-transparent conductive material, a shielding layer is disposed on a surface of the radiation layer away from the encapsulation layer to shield the radiation layer.
4. The coupled feed antenna of claim 1, wherein the first metal layer comprises one of a gate layer, a source metal layer, a drain metal layer, an anode metal layer, a cathode metal layer, and a touch layer.
5. The coupled feed antenna of claim 1, wherein the thickness of the first glue layer is 20 μm to 100 μm.
6. The coupled feed antenna of claim 1, wherein the radiating layer cross-section is rectangular, the length of the rectangle is determined according to the antenna frequency, the antenna equivalent dielectric constant and the equivalent radiating slot length, and the width of the rectangle is determined according to the antenna frequency and the dielectric constant of the first dielectric layer.
7. A method of making a coupled feed antenna, comprising:
providing a display panel, wherein a first metal layer of the display panel is provided with a gap for coupling feed between a radiation layer and a feeder line;
attaching a radiation layer to one side of the packaging layer of the display panel through a first adhesive layer; and
the feeder line is attached to one side of the substrate layer of the display panel through a second adhesive layer;
the film layer between the radiation layer and the first metal layer forms a first dielectric layer, the first dielectric layer is used as a substrate of the coupling feed antenna, the film layer between the feeder line and the first metal layer forms a second dielectric layer, the first dielectric layer is made of a material with a low dielectric constant, the second dielectric layer is made of a material with a high dielectric constant, the dielectric constant of the first dielectric layer is not more than a first threshold value, and the dielectric constant of the second dielectric layer is higher than a second threshold value.
8. The method of claim 7, wherein when the radiation layer is made of a non-transparent conductive material, the radiation layer is patterned to form through holes in the radiation layer to expose pixels of the light-emitting layer under the radiation layer;
and covering a shielding layer on the surface of one side of the radiation layer, which is far away from the packaging layer, so as to shield the radiation layer.
9. The method of claim 7, further comprising:
providing a flexible circuit board, wherein the flexible circuit board is provided with a circuit matched with the impedance of the coupling feed antenna;
and connecting the feeder line with the input port of the flexible circuit board by adopting a back binding process.
10. The method of claim 9, wherein when there are multiple coupled feed antennas, the flexible printed circuit board has multiple input ports, and the feed line of each coupled feed antenna is connected to the corresponding input port of the flexible printed circuit board by a backside bonding process to form a coupled feed antenna array.
11. The method of claim 7, wherein attaching a radiation layer to a side of an encapsulation layer of the display panel comprises:
attaching a radiation layer to a frame region on one side of the packaging layer of the display panel;
the laminating feeder in display panel's stratum basale one side includes:
and a feeder line is attached to a frame area on one side of the substrate layer of the display panel, and the radiation layer corresponds to the feeder line in the thickness direction of the display panel.
12. The method of claim 11, wherein one edge of the radiation layer is attached to the outer side of the frame region, or attached to a position spaced apart from the outer side of the frame region.
13. The method for manufacturing a coupled feed antenna according to claim 12, wherein the feed line is led out from an outer side of the frame region to a side of the frame region close to the display region; or
The feeder line is led out from one side of the frame area, which is close to the display area, to the outer side of the frame area.
14. The method of claim 7, wherein attaching a radiation layer to a side of an encapsulation layer of the display panel comprises:
attaching a radiation layer to a display area on one side of an encapsulation layer of the display panel;
the laminating feeder in display panel's stratum basale one side includes:
and a feeder line is attached to a display area on one side of the substrate layer of the display panel, and the radiation layer corresponds to the feeder line in the thickness direction of the display panel.
15. A display device, comprising:
the coupled feed antenna of any of claims 1 to 6, or made using the method of any of claims 7 to 14; and
and a gap for coupling feed between the radiation layer and the feeder line is formed in the first metal layer of the display panel.
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| CN116780181A (en) * | 2023-07-04 | 2023-09-19 | 中天射频电缆有限公司 | Differential broadband bidirectional radiation dielectric patch resonator antenna |
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| CN206602180U (en) * | 2017-01-22 | 2017-10-31 | 深圳市景程信息科技有限公司 | Wideband dual polarized aperture-coupled feed antennas |
| CN111883916A (en) * | 2020-07-16 | 2020-11-03 | 南通大学 | Broadband low-profile dielectric patch filtering antenna based on double-slit feed structure |
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| US6982671B2 (en) * | 2003-02-25 | 2006-01-03 | Harris Corporation | Slot fed microstrip antenna having enhanced slot electromagnetic coupling |
| JP3895737B2 (en) * | 2004-04-09 | 2007-03-22 | 古河電気工業株式会社 | Multi-frequency antenna and small antenna |
| CN108963443A (en) * | 2017-05-26 | 2018-12-07 | 惠州硕贝德无线科技股份有限公司 | A kind of antenna and encapsulating antenna structure |
| US10903553B2 (en) * | 2019-06-27 | 2021-01-26 | Google Llc | Display device with integrated antenna |
| KR102670834B1 (en) * | 2019-07-25 | 2024-05-29 | 엘지디스플레이 주식회사 | Flat Panel Antenna Having Liquid Crystal |
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| CN206602180U (en) * | 2017-01-22 | 2017-10-31 | 深圳市景程信息科技有限公司 | Wideband dual polarized aperture-coupled feed antennas |
| CN111883916A (en) * | 2020-07-16 | 2020-11-03 | 南通大学 | Broadband low-profile dielectric patch filtering antenna based on double-slit feed structure |
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