CN111562860B - Touch display screen and electronic equipment - Google Patents
Touch display screen and electronic equipment Download PDFInfo
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- CN111562860B CN111562860B CN202010431916.8A CN202010431916A CN111562860B CN 111562860 B CN111562860 B CN 111562860B CN 202010431916 A CN202010431916 A CN 202010431916A CN 111562860 B CN111562860 B CN 111562860B
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- 230000009466 transformation Effects 0.000 claims description 35
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- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229920000106 Liquid crystal polymer Polymers 0.000 description 13
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 13
- 239000011521 glass Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 8
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- 238000002791 soaking Methods 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 1
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- 230000009977 dual effect Effects 0.000 description 1
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Waveguide Aerials (AREA)
Abstract
The application discloses a touch display screen and electronic equipment, wherein the touch display screen comprises: the touch control layer, the display layer, at least one first feeder line structure and the dielectric layer; at least one annular opening is formed in the touch control layer; the first feeder line structure and the medium layer are positioned between the display layer and the touch layer, and the medium layer is positioned between the first feeder line structure and the touch layer; the orthographic projection area of the first feeder line structure on the touch layer spans the inner ring and the outer ring of the annular opening. The application can integrate the antenna structure on the touch display screen with the touch layer, and does not need to add an extra wiring layer above the touch layer so as to avoid influencing the performance of the touch layer of the screen.
Description
Technical Field
The present application relates to the field of electronic products, and in particular, to a touch display screen and an electronic device.
Background
With the development of wireless communication technology, especially with the development of the fifth Generation mobile communication technology (5 th-Generation, 5G), the application scenario of the wireless communication system is more and more abundant, so that the requirement on an antenna which is one of the key components of the wireless communication system is more and more high. On one hand, in some application scenarios, the antenna needs to have conformality, concealment and safety so as to be integrated on wireless products such as automobiles, intelligent wearing, intelligent home furnishings and the like; on the other hand, as the transmission rate of the wireless communication system is higher, the communication capacity is larger, the carrier frequency is higher, and the path loss caused by the higher carrier frequency is larger, so that the array antenna is required to improve the gain to overcome the influence of the path loss, and in order to meet the high gain and simultaneously enable beam scanning or beam forming (beamforming), the phased array antenna (phased antenna array) technology is required to be adopted, and thus more and more antennas are required to be integrated in a limited space.
In order to integrate more and more antennas in a limited space, other antenna spaces need to be opened up based on the traditional antenna design mode, for example: screen integrated antennas, i.e., antenna on-screen designs, screen-contained antenna designs, and the like. Particularly, with the rise of the full screen of 5G wireless communication products, the number of antennas is increasing, and the effect of extremely full screen is pursued, so that the space of the antennas is continuously compressed, and thus, the integration of transparent antennas on the screen is becoming more and more urgent. Currently, millimeter wave antennas are generally disposed above a display screen, and such design is only applicable to display screens without a touch layer, such as: television, advertising screen, etc., the design of an under-screen antenna is limited by the type of display screen.
Disclosure of Invention
The embodiment of the application provides a touch display screen and electronic equipment, which are used for solving the problem that the existing antenna on-screen design can only be applied to a display screen without a touch layer and is limited by the type of the display screen.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, an embodiment of the present application provides a touch display screen, including:
a display layer;
the touch control layer is provided with at least one annular opening;
at least one first feeder structure and a dielectric layer, the first feeder structure and the dielectric layer being located between the display layer and the touch layer, and the dielectric layer being located between the first feeder structure and the touch layer;
the orthographic projection area of the first feeder line structure on the touch layer spans the inner ring and the outer ring of the annular opening.
In a second aspect, an embodiment of the present application further provides an electronic device, including the touch display screen as described above.
In the scheme of the application, the annular opening is formed in the touch layer, and the dielectric layer and the first feeder line structure are arranged below the touch layer to manufacture the slot antenna, so that the feed source of the first feeder line structure is connected to excite the slot antenna to radiate antenna signals, the antenna structure can be integrated on the touch display screen with the touch layer, and an additional wiring layer is not required to be added above the touch layer, so that the performance of the touch layer of the screen is prevented from being influenced.
Drawings
FIG. 1 is a schematic diagram of a touch display screen according to an embodiment of the application;
FIG. 2 is a schematic diagram of a touch display screen according to an embodiment of the application;
figure 3 shows one of the schematic diagrams of the first feed line structure of an embodiment of the application;
FIG. 4 shows a second schematic view of a first feed line structure according to an embodiment of the application;
figure 5 shows a schematic view of a second feed line structure of an embodiment of the application;
FIG. 6 shows a schematic diagram of a flexible circuit board according to an embodiment of the application;
fig. 7 is a schematic diagram of an S-parameter diagram of a slot antenna according to an embodiment of the present application;
fig. 8 shows an efficiency diagram of a slot antenna according to an embodiment of the present application;
fig. 9 shows the radiation pattern of a single slot antenna according to an embodiment of the present application.
Reference numerals illustrate:
1. a touch layer; 11. an annular opening;
2. a display layer;
3. a first adhesive layer;
4. a first feed line structure; 41. a first sub-feeder structure; 411. a first impedance transformation structure; 412. a first microstrip feed line; 42. a second sub-feeder structure; 421. a second impedance transformation structure; 422. a second microstrip feed line; 43. a third sub-feeder structure; 431. a third impedance transformation structure; 432. a third microstrip feed line; 44. a fourth sub-feeder structure; 441. a fourth impedance transformation structure; 442. a fourth microstrip feed line;
5. a polarizer;
6. a second adhesive layer;
7. a glass cover plate;
8. soaking cotton;
9. a second feed line structure; 91. a metal formation; 92. a first substrate; 93. a strip feed line; 94. a second substrate; 941. a through hole; 95. a coplanar waveguide; 951. an antenna feed point;
10. a flexible circuit board; 100. a display chip; 101. a touch chip; 102. a connector.
Detailed Description
Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
As shown in fig. 1 and 2, an embodiment of the present application provides a touch display screen, including: the touch screen comprises a touch control layer 1, a display layer 2, at least one first feeder line structure 4 and a dielectric layer.
At least one annular opening 11 is formed in the touch layer 1; the first feeder line structure 4 and the dielectric layer are positioned between the display layer 2 and the touch layer 1, and the dielectric layer is positioned between the first feeder line structure 4 and the touch layer 1; wherein, the orthographic projection area of the first feeder line structure 4 on the touch layer 1 spans the inner ring and the outer ring of the annular opening 11.
Optionally, the length of the annular opening 11 on the touch layer 1 may be about half the wavelength of the medium, the width of the annular opening 11 is smaller, and the specific size of the annular opening 11 may be adjusted according to the impedance matching condition.
Alternatively, the width of the annular aperture 11: i.e. the vertical distance between the inner ring and the outer ring may be the same; an annular opening 11 may divide the touch layer 1 into: a first region on the inside of the inner ring (or the first region surrounded by the inner ring) and a second region on the outside of the outer ring; the orthographic projection of the first feeder structure 4 on the touch layer 1 across the inner and outer rings of the annular opening 11 can be understood as: the orthographic projection area of one end of the first feeder structure 4 on the touch layer 1 spans the annular opening 11 in the width direction, i.e. the orthographic projection area of one end of the first feeder structure 4 on the touch layer 1 is in the first area, in the area of the annular opening 11 and in the second area in sequence.
Optionally, the annular opening 11 is located in a non-sensitive area of the touch layer 1; the non-sensitive area may be an area on the touch display screen where the touch probability is smaller than a preset threshold or cannot be touched. Thereby, the influence on the touch function of the touch display screen can be reduced.
For example: the non-sensitive area may be: the area corresponding to the black edge area of the touch display screen, or the non-sensitive area may also be: the area corresponding to the status bar display area of the touch display screen is not limited to this.
Alternatively, the shape of the annular opening 11 may be a square ring, a circular ring, a rectangular ring, or the like.
Alternatively, the touch layer 1 may be an Indium Tin Oxide (ITO) touch layer, etc., which is not limited to this embodiment.
Alternatively, the display layer 2 may include an upper glass and a lower glass, and a display material (such as a liquid crystal) disposed between the upper glass and the lower glass, or the display layer 2 may emit light through a semiconductor, which is not limited to this.
Alternatively, one annular opening 11 may correspond to one dielectric layer; for example: in the case where the number of the annular openings 11 is greater than 1: the annular openings 11 and the dielectric layers may be arranged in a one-to-one correspondence, or the plurality of annular openings 11 may be arranged corresponding to one dielectric layer, for example, in an array antenna formed by slot antennas corresponding to the plurality of annular openings 11, one dielectric layer corresponds to one row or one column of annular openings, etc., which is not limited in the embodiment of the present application.
Wherein one of the annular openings 11, the first feeder structure 4 corresponding to the annular opening 11 (e.g. the first feeder structure with the orthographic projection area straddling the inner ring and the outer ring of the one annular opening 11), and the dielectric layer disposed therebetween may be formed as a slot antenna.
Alternatively, as one implementation: the dielectric layer may be a dielectric substrate disposed between the first feeder structure 4 and the touch layer 1, such as: a liquid crystal polymer (Liquid Crystal Polymer, LCP) substrate, or the like; of course, other substrates may be used, and may be used as a dielectric substrate of the antenna, which is not limited to this embodiment of the present application.
Alternatively, as another implementation: the touch display screen may further include: a first adhesive layer 3; the display layer 2 is connected with the touch layer 1 through the first adhesive layer 3, and the first adhesive layer 3 extends to a part between the touch layer 1 and the first feeder line structure 4 to form the dielectric layer.
Alternatively, the first adhesive layer 3 may be a special adhesive for bonding transparent optical elements (e.g., lenses, etc.), such as an optically clear adhesive (Optically Clear Adhesive, OCA), an optically clear resin (Optical Clear Resin, OCR), etc.
For example: the annular opening 11 is formed on the touch layer 1 to serve as a slot of a slot antenna (i.e. the touch layer 1 can serve as an antenna ground), the first feeder line structure 4 of the slot antenna is fixed below the touch layer 1 through the first adhesive layer 3, and one side, connected with the first feeder line structure 4, of the touch layer 1 is adhered to the display layer 2 through the first adhesive layer 3.
Alternatively, in the case where the number of the annular openings 11 is greater than 1, slot antennas corresponding to the annular openings 11 are arranged in accordance with a predetermined rule to constitute an antenna array.
Alternatively, in the case that the number of the annular openings 11 is greater than 1, it may be that one annular opening 11 corresponds to at least one first feeder structure 4, for example, one annular opening 11 corresponds to one first feeder structure 4, or one annular opening 1 corresponds to two first feeder structures 4, or one annular opening 1 corresponds to four first feeder structures 4, or the like, which is not limited to this embodiment of the present application.
Alternatively, the slot antenna corresponding to the annular opening 11 may be a millimeter wave slot antenna.
In the embodiment of the application, the annular opening 11 is formed on the touch layer 1, and the dielectric layer and the first feeder line structure 4 are arranged below the touch layer 1 to manufacture the slot antenna, so that the feed source of the first feeder line structure is connected to excite the slot antenna to radiate antenna signals, thereby realizing the integration of the antenna structure on the touch display screen with the touch layer 1, avoiding the influence on the performance of the touch layer of the screen, realizing the communication function of the antenna on the screen, simultaneously not influencing the touch function, and reducing the processing difficulty of the process.
In addition, by forming the annular opening 11 on the touch layer 1 and forming the dielectric layer and the first feeder line structure 4 below the touch layer 1 to manufacture the slot antenna, an antenna array can be formed without separately forming an integrated antenna module package (AiP) module, thereby effectively saving space.
Alternatively, as one implementation: one annular opening 11 may correspond to one first feed line structure 4, i.e. the slot antenna formed by one annular opening 11 may be fed single ended.
Alternatively, the first feed line structure 4 may comprise: impedance transformation structure and microstrip feeder; the first end of the microstrip feeder is connected with the impedance transformation structure; at the end of the first feeder line structure 4 where the impedance transformation structure is located, the orthographic projection area on the touch layer 1 spans the inner ring and the outer ring of the annular opening 11.
For example: the orthographic projection area of the impedance transformation structure on the touch layer 1 is spanned on the inner ring and the outer ring of the annular opening 11; or, the orthographic projection area of the impedance transformation line on the touch layer 1 is positioned in the area surrounded by the inner ring of the annular opening 11; alternatively, a part of the orthographic projection area of the impedance transformation line on the touch layer 1 is located in an area surrounded by the inner ring of the annular opening 11, and the other part is located in a partial area of the annular opening.
Alternatively, as another implementation: as shown in fig. 3, the annular aperture 11 is symmetrical with respect to the first axis; for example: in the case where the shape of the annular opening 11 is that of the first symmetry axis, the first symmetry axis may be a symmetry axis in the rectangular length direction; in the case of an elliptical shape of the annular opening 11, the first axis of symmetry may be the major axis of the ellipse.
Optionally, the at least one first feed line structure comprises: a first sub-feed line structure 41 and a second sub-feed line structure 42.
The orthographic projection area of the first sub-feeder line structure 41 on the touch layer 1 spans the inner ring and the outer ring at the first position of the annular opening 11; the orthographic projection area of the second sub-feeder line structure 42 on the touch layer 1 spans the inner ring and the outer ring at the second position of the annular opening 11; wherein the first and second positions are symmetrical with respect to the first axis.
In this way, the slot antenna constituted by the annular aperture 11 can be differentially fed by the first sub-feeder structure 41 and the second sub-feeder structure, whereby the radiation performance of the antenna can be improved.
Optionally, the first sub-feeder structure 41 may include: a first impedance transformation structure 411 and a first microstrip feed line 412.
A first end of the first microstrip feeder 412 is connected with the first impedance transformation structure 411, and a second end of the first microstrip feeder 412 is connected with the feed source; the front projection area of the end of the first sub-feeder structure 41 where the first impedance transformation structure 411 is located on the touch layer 1 spans the inner ring and the outer ring of the annular opening 11. Specific forms can be referred to the above embodiments, and will not be described here again.
Optionally, the second sub-feeder structure 42 may include: a second impedance transformation structure 421 and a second microstrip feed line 422.
The first end of the second microstrip feeder 422 is connected with the second impedance transformation structure 421, and the second end of the second microstrip feeder 422 is connected with the feed source; the orthographic projection area of the end of the second sub-feeder structure 42 where the second impedance transformation structure 421 is located on the touch layer 1 spans the inner ring and the outer ring of the annular opening 11. Specific forms can be referred to the above embodiments, and will not be described here again.
The purpose of the impedance transformation structure is to achieve better impedance matching, and specifically, the shape of the impedance transformation structure may be circular, trapezoidal, triangular, etc., which is not limited by the embodiment of the present application.
Optionally, as yet another implementation: as shown in fig. 4, the annular aperture 11 may be symmetrical with respect to a first axis and a second axis, respectively, and the second axis is perpendicular to the first axis; alternatively, the shape of the annular opening 11 may be square, circular, or the like.
Feeding with two feeding ports perpendicular to each other, as the at least one first feeding line structure comprises: a first sub-feed line structure 41, a second sub-feed line structure 42, a third sub-feed line structure 43 and a fourth sub-feed line structure 44. Wherein the first sub-feeder structure 41 and the second sub-feeder structure 42 constitute a horizontally polarized feeder; the third sub-feed line structure 43 and the fourth sub-feed line structure 44 constitute a vertically polarized feed line.
The orthographic projection area of the first sub-feeder line structure 41 on the touch layer 1 spans the inner ring and the outer ring at the first position of the annular opening 11; the orthographic projection area of the second sub-feeder line structure 42 on the touch layer 1 spans the inner ring and the outer ring at the second position of the annular opening 11; wherein the first and second positions are symmetrical with respect to the first axis.
The orthographic projection area of the third sub-feeder line structure 43 on the touch layer 1 spans the inner ring and the outer ring at the third position of the annular opening 11; the orthographic projection area of the fourth sub-feeder line structure 44 on the touch layer 1 spans the inner ring and the outer ring at the fourth position of the annular opening 11; wherein the third and fourth positions are symmetrical about the second axis.
Optionally, the first sub-feeder structure 41 may include: a first impedance transformation structure 411 and a first microstrip feed line 412.
A first end of the first microstrip feeder 412 is connected with the first impedance transformation structure 411, and a second end of the first microstrip feeder 412 is connected with the feed source; the front projection area of the end of the first sub-feeder structure 41 where the first impedance transformation structure 411 is located on the touch layer 1 spans the inner ring and the outer ring of the annular opening 11. Specific forms can be referred to the above embodiments, and will not be described here again.
Optionally, the second sub-feeder structure 42 may include: a second impedance transformation structure 421 and a second microstrip feed line 422.
The first end of the second microstrip feeder 422 is connected with the second impedance transformation structure 421, and the second end of the second microstrip feeder 422 is connected with the feed source; the orthographic projection area of the end of the second sub-feeder structure 42 where the second impedance transformation structure 421 is located on the touch layer 1 spans the inner ring and the outer ring of the annular opening 11. Specific forms can be referred to the above embodiments, and will not be described here again.
The third sub-feeder structure 43 may include: a third impedance transformation structure 431 and a third microstrip feed line 432.
The first end of the third microstrip feeder 432 is connected with the third impedance transformation structure 431, and the second end of the third microstrip feeder 432 is connected with the feed source; the orthographic projection area of the third sub-feeder structure 43 at the end where the third impedance transformation structure 431 is located is straddled between the inner ring and the outer ring of the annular opening 11. Specific forms can be referred to the above embodiments, and will not be described here again.
Optionally, the fourth sub-feeder structure 44 may include: a fourth impedance transformation structure 441 and a fourth microstrip feed line 442.
A first end of a fourth microstrip feeder 442 is connected with the fourth impedance transformation structure 441, and a second end of the fourth microstrip feeder 442 is connected with the feed source; the orthographic projection area of the end of the fourth sub-feeder structure 44 where the fourth impedance transformation structure 441 is located on the touch layer 1 spans the inner ring and the outer ring of the annular opening 11. Specific forms can be referred to the above embodiments, and will not be described here again.
The purpose of the impedance transformation structure is to achieve better impedance matching, and specifically, the shape of the impedance transformation structure may be circular, trapezoidal, triangular, etc., which is not limited by the embodiment of the present application.
It should be noted that, in the embodiment of the present application, the feeding position of the feeding line structure into the annular opening 11 is the central position thereof; the position of the connection point (antenna feed point) can be specifically adjusted according to actual needs, and the embodiment of the application is not limited to this.
As shown in fig. 1 and 2, optionally, the touch display screen may further include: a polarizer 5 and a cover glass 7. The polaroid 5 is arranged on one side of the touch control layer 1, which is away from the display screen 2; the cover glass 7 is arranged on one side of the polarizer 5, which is away from the touch layer 1.
The optional glass cover plate 7 may be adhered to the polarizer 5 at a side facing away from the touch layer 1 by a second adhesive layer 6, for example, the second adhesive layer 6 may be OCA or OCR glue.
Because the glass cover plate with large dielectric constant and large dielectric loss (the typical values of the dielectric constant and the loss tangent angle of the glass cover plate are 6.9 and 0.034) exists on the display screen, the problem of beam distortion is more obvious on the screen, and therefore, the annular slot antenna (such as a millimeter wave annular slot antenna) in the embodiment of the application can effectively improve the radiation performance of the millimeter wave antenna and reduce the distortion of glass on a directional diagram by adopting a differential feed mode.
Preferably, the shape of the annular opening 11 may be preferably a square, circular or other symmetrical pattern, so that dual polarization performance of the annular slot antenna is obtained by adding mutually perpendicular feeder structures, thereby improving radiation performance of the antenna and reducing distortion of the pattern caused by glass.
Optionally, the touch display screen may further include: and soaking cotton 8. The foam 8 is arranged on one side of the display layer 2 away from the touch layer 1.
As shown in fig. 5, optionally, the touch display screen further includes: a second feed line structure 9.
The first end of the second feed line structure 9 is connected to the first feed line structure 4 and the second end of the second feed line structure 9 is connected to the feed source.
Optionally, the second feed line structure 9 comprises: a metal formation 91, a first substrate 92, a strip feed 93, a second substrate 94, and a coplanar waveguide 95.
The metal layer 91 is disposed on a first surface of the first substrate 92; the strip feed 93 is disposed between the second face of the first substrate 92 and the first face of the second substrate 94; the second substrate 94 is provided with a through hole 941; the coplanar waveguide 95 is disposed on the second surface of the second substrate 94, and a first end of the coplanar waveguide 95 is connected to the first end of the strip feed 93 through the via 941, a second end of the coplanar waveguide 95 is connected to the first feed structure 4, and a second end of the strip feed 93 is connected to the feed.
Wherein the feed may be provided by a radio frequency integrated circuit (Radiao Frquency Intergarted Circuit, RFIC).
Alternatively, the strip feed 93 may be a totally enclosed feed structure, and the strip feed may be fabricated on a metal plate; a second end of the coplanar waveguide 95 is formed as an antenna feed 951, which antenna feed 951 is adapted to be connected to the first feed structure 4, by making the coplanar waveguide in a metal plate. The via 941 may be a metal via formed on the second substrate 94. The first and second substrates 92, 94 may be LCP substrates.
The second feeder structure 9 in the embodiment of the present application adopts an LCP feeder structure based on a strip feeder 93 (strip line) to coplanar waveguide (CPW) to feed a slot antenna formed on the touch layer 1. For example: in the case where the slot antenna is a millimeter wave slot antenna, millimeter wave radio frequency signals may enter the strip feed 93 through an RFIC circuit. Since the strip feed line 93 is a totally enclosed feed structure, electromagnetic waves thereon do not leak into space, thereby avoiding electromagnetic interference with other components in the electronic device. Near the antenna feed point 951, the strip feed 93 is transformed to the upper coplanar waveguide through a metal via to achieve good common ground between the feed's reference ground and the antenna ground on the touch layer.
It should be noted that the feeding form of the second feeder structure 9 is only an alternative embodiment of the present application, and other forms of LCP feeder structures such as coaxial feeding, microstrip feeding, etc. may be used, which is not limited to this embodiment of the present application.
Optionally, impedance control can also be done on the LCP feed line structure, with the line length being as short as possible to reduce path loss. The feeder line of each slot antenna unit is converged to a link Area (Bonding Area), directly led to a touch hot-pressing position, and is connected to the pins of the RFIC circuit through the wiring on the LCP feeder line structure after hot-pressing. Wherein, the link area can be provided with a positioning mark so as to be positioned by LCP hot pressing.
Because the LCP material has the properties of low high-frequency loss, good stability, easy bending and the like, the LCP material is adopted as the connecting line of the microstrip feeder line of the annular slot antenna on the screen and the antenna signal source in the embodiment of the application, so that unnecessary line loss caused by feeding can be reduced as much as possible.
Alternatively, at least one of the display chip 100 and the touch chip 101 of the touch display may be disposed on the first circuit board with the RFIC, i.e., at least one of the display chip 100 and the touch chip 101 of the touch display may be disposed on the same circuit board as the RFIC, such as the flexible circuit board 10, as shown in fig. 6.
Alternatively, the RFIC may be soldered to the LCP feed line structure, and at least one of the display chip 100 and the touch chip 101 of the touch display may also be disposed on the LCP.
In this way, the RFIC and the display chip 100 and the touch chip 101 can share the connector 102 on the same circuit board, and the circuit board and the connector are not required to be separately arranged, so that the space is effectively saved. The connector 102 may be a board-to-board (TBT) connector, which may be used for connection with a motherboard in an electronic device.
In the embodiment of the present application, a single loop slot antenna formed on the touch layer 1 is taken as an example for illustration, and in practice, the loop slot antenna in the embodiment of the present application may be used as a unit for array design. Fig. 7 is a schematic diagram of an S-parameter diagram of a slot antenna, fig. 8 is an efficiency diagram of a slot antenna, and fig. 9 is a radiation pattern of a single slot antenna. As can be seen from fig. 7 and fig. 8, with-6 dB as a standard, the impedance bandwidth of the loop slot antenna monomer formed based on the touch layer designed in the embodiment of the present application can cover the frequency band of 54.5GHz to 64GHz, and the efficiency of the wideband slot antenna based on the touch layer within the impedance bandwidth basically meets the requirement.
The embodiment of the application also provides electronic equipment, which comprises the touch display screen, can realize the corresponding functions of the touch display screen and achieve the same technical effects, and is not repeated here.
Optionally, when the slot antenna is made of transparent materials, the antenna has light transmittance and better antenna radiation performance, so that the antenna can be applied to intelligent wearing equipment such as intelligent glasses, virtual Reality (VR) equipment, augmented Reality (Augmented Reality, AR) equipment and the like, and can also be applied to glass or display screens of mobile terminal equipment such as Internet of things, intelligent home, automobiles, mobile phones and the like, and the antenna has conformal and concealed characteristics, and the design space of the antenna can be greatly expanded.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the embodiments of the application.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.
While the foregoing is directed to the preferred embodiments of the present application, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present application, and such modifications and changes are intended to be within the scope of the present application.
Claims (9)
1. A touch display screen, comprising:
a display layer;
the touch control layer is provided with at least one annular opening;
at least one first feeder structure and a dielectric layer, the first feeder structure and the dielectric layer being located between the display layer and the touch layer, and the dielectric layer being located between the first feeder structure and the touch layer; the orthographic projection area of the first feeder line structure on the touch layer spans the inner ring and the outer ring of the annular opening;
the touch display screen further includes:
the display layer is connected with the touch layer through the first adhesive layer, and the first adhesive layer extends to a part between the touch layer and the first feeder line structure to form the dielectric layer;
the first feeder line structure is fixed below the touch control layer through the first adhesive layer.
2. The touch display screen of claim 1, wherein the annular aperture is symmetrical about a first axis; the at least one first feed line structure comprises:
a first sub-feeder structure, wherein a orthographic projection area of the first sub-feeder structure on the touch layer spans an inner ring and an outer ring at a first position of the annular opening;
a second sub-feeder structure, wherein a orthographic projection area of the second sub-feeder structure on the touch layer spans an inner ring and an outer ring at a second position of the annular opening;
wherein the first and second positions are symmetrical about the first axis.
3. The touch display screen of claim 2, wherein the annular aperture is further symmetrical about a second axis, and the second axis is perpendicular to the first axis; the at least one first feed line structure further comprises:
a third sub-feeder structure, wherein a orthographic projection area of the third sub-feeder structure on the touch layer spans an inner ring and an outer ring at a third position of the annular opening;
a fourth sub-feeder structure, wherein a orthographic projection area of the fourth sub-feeder structure on the touch layer spans an inner ring and an outer ring at a fourth position of the annular opening;
wherein the third and fourth positions are symmetrical about the second axis.
4. The touch display screen of claim 1, wherein the first feed line structure comprises: impedance transformation structure and microstrip feeder; the first end of the microstrip feeder is connected with the impedance transformation structure, and the second end of the microstrip feeder is connected with the feed source;
the front projection area on the touch layer spans the inner ring and the outer ring of the annular opening at one end of the first feeder line structure where the impedance transformation structure is located.
5. The touch display screen of any one of claims 1 to 4, further comprising:
and the first end of the second feeder line structure is connected with the first feeder line structure, and the second end of the second feeder line structure is connected with the feed source.
6. The touch display screen of claim 5, wherein the second feed line structure comprises:
the device comprises a metal stratum and a first substrate, wherein the metal stratum is arranged on a first surface of the first substrate;
a strip feed line and a second substrate, the strip feed line disposed between the second face of the first substrate and the first face of the second substrate; the second substrate is provided with a through hole;
the coplanar waveguide is arranged on the second surface of the second substrate, the first end of the coplanar waveguide is connected with the first end of the strip feeder through the through hole, the second end of the coplanar waveguide is connected with the first feeder structure, and the second end of the strip feeder is connected with the feed source.
7. The touch display screen of claim 1, wherein the annular aperture is located in a non-sensitive area of the touch layer;
the non-sensitive area is: an area corresponding to a black edge area of the touch display screen or an area corresponding to a status bar display area of the touch display screen.
8. The touch display screen according to claim 1, wherein, in the case that the number of the annular openings is greater than 1, slot antennas corresponding to the annular openings are arranged according to a predetermined rule to form an antenna array.
9. An electronic device comprising the touch display screen of any one of claims 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010431916.8A CN111562860B (en) | 2020-05-20 | 2020-05-20 | Touch display screen and electronic equipment |
| PCT/CN2021/094337 WO2021233288A1 (en) | 2020-05-20 | 2021-05-18 | Touch display screen and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010431916.8A CN111562860B (en) | 2020-05-20 | 2020-05-20 | Touch display screen and electronic equipment |
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| CN111562860A CN111562860A (en) | 2020-08-21 |
| CN111562860B true CN111562860B (en) | 2023-11-24 |
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| CN111562860B (en) * | 2020-05-20 | 2023-11-24 | 维沃移动通信有限公司 | Touch display screen and electronic equipment |
| CN112333307B (en) * | 2020-10-29 | 2022-07-08 | 维沃移动通信有限公司 | Display module and electronic device |
| CN112306299B (en) * | 2020-10-30 | 2024-01-26 | 维沃移动通信有限公司 | Touch panel integrated with antenna and electronic equipment |
| CN112993525B (en) * | 2021-02-03 | 2024-03-19 | 维沃移动通信有限公司 | Display device and electronic apparatus |
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| WO2021233288A1 (en) | 2021-11-25 |
| CN111562860A (en) | 2020-08-21 |
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