CN111273470A - Liquid crystal phase shifter and electronic device - Google Patents
Liquid crystal phase shifter and electronic device Download PDFInfo
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- CN111273470A CN111273470A CN202010222380.9A CN202010222380A CN111273470A CN 111273470 A CN111273470 A CN 111273470A CN 202010222380 A CN202010222380 A CN 202010222380A CN 111273470 A CN111273470 A CN 111273470A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Geometry (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention relates to the field of signal transmission, and in particular, to a liquid crystal phase shifter and an electronic device. The liquid crystal phase shifter includes: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer arranged between the first substrate and the second substrate; a driving structure for influencing the dielectric constant of the liquid crystal is formed on one side of the first substrate facing the second substrate; and one side of the second substrate, which faces the first substrate, is provided with a signal transmission line and reference lines arranged on two sides of the signal transmission line. The drive structure influence of liquid crystal phase shifter sets up the dielectric constant of liquid crystal layer between first base plate and second base plate in this application, and then influences the speed that the signal transmitted on the signal transmission line, and the in-process of signal transmission need not couple like this to reduce the loss in the signal transmission process.
Description
Technical Field
The present invention relates to the field of signal transmission technologies, and in particular, to a liquid crystal phase shifter and an electronic device.
Background
Phased array liquid crystal antennas are receiving much attention due to their low cost, small volume and light weight brought by their ultra-thin structure. The phase shifter part of the current phased array liquid crystal antenna mainly comprises a phase shifting transmission line, a liquid crystal driving voltage loading line and a coupling blocking device, wherein direct current driving voltage on the liquid crystal driving loading line is loaded on the phase shifting transmission line to drive liquid crystal below the phase shifting transmission line to turn over, so that the dielectric constant of the liquid crystal is changed, and further, the propagation speed of microwave signals is changed to achieve the function of beam scanning. Currently, ITO is used as a mode for loading a liquid crystal driving voltage, and although ITO has a high square resistance, it is directly connected with a phase-shifting transmission line, so that the condition of microwave leakage is difficult to avoid. Meanwhile, because the dc offsets of different array elements are different, the microwave signals of the array elements must pass through a coupling dc-blocking device before being fed into the power divider, and this coupling also inevitably causes signal loss.
Disclosure of Invention
The application provides a liquid crystal phase shifter, drive structure influence sets up the dielectric constant that sets up the liquid crystal layer between first base plate and second base plate, and then influences the speed that the signal transmitted on the signal transmission line, and the in-process of signal transmission need not couple like this to reduce the loss among the signal transmission process.
In order to achieve the above object, the present application provides a liquid crystal phase shifter comprising:
the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer arranged between the first substrate and the second substrate;
a driving structure for influencing the dielectric constant of the liquid crystal is formed on one side of the first substrate facing the second substrate;
and one side of the second substrate, which faces the first substrate, is provided with a signal transmission line and reference lines arranged on two sides of the signal transmission line.
The liquid crystal phase shifter in this application, drive structure sets up on first base plate, and drive structure can produce the electric field that influences the dielectric constant that sets up the liquid crystal layer between first base plate and second base plate, and then influences the speed that is located the interior signal transmission of signal transmission line on the second base plate to realize shifting the function of looks. The arrangement mode avoids signal leakage caused by the condition that the driving structure and the microwave signal share the transmission line, saves a coupling DC isolator for isolating different DC offsets and reduces signal loss.
Preferably, the driving structure comprises at least two driving electrode loading lines, and the extending paths of the at least two driving electrode loading lines are the same.
Preferably, at least two of the driving electrode loading lines are arranged in parallel.
Preferably, at least two of the driving electrode loading lines are arranged in an S-shape.
Preferably, the driving electrode loading line comprises a driving main line and a plurality of driving finger inserting portions arranged on each driving main line, the adjacent driving finger inserting portions are arranged on the driving main line, the plurality of driving finger inserting portions extend towards opposite directions, and the adjacent driving finger inserting portions are arranged on the driving main line in a plurality of staggered mode.
Preferably, the projection of the driving structure on the second substrate is located between the two reference lines, or the projection of the driving structure on the second substrate coincides with the two reference lines.
Preferably, the signal transmission line and the reference line extend along the same path as the driving electrode loading line.
Preferably, the reference line includes a reference main line and a plurality of reference finger-inserting portions disposed on each of the reference main lines, the plurality of reference finger-inserting portions on two adjacent reference main lines extend in opposite directions, and the plurality of reference finger-inserting portions on two adjacent reference main lines are distributed in a staggered manner to form a gap for disposing the signal transmission line.
Preferably, the driving electrode loading line is a metal electrode.
The application provides an electronic device, which comprises the liquid crystal phase shifter. The effect of the liquid crystal phase shifter is the same as that of the liquid crystal phase shifter, and the description is omitted.
Drawings
FIG. 1 is a schematic diagram of a liquid crystal phase shifter according to an embodiment of the present application;
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is a schematic diagram of another structure of a liquid crystal phase shifter according to an embodiment of the present application;
fig. 4 is a schematic view of another structure of a liquid crystal phase shifter according to an embodiment of the present application.
Icon: 1-a first substrate; 2-a second substrate; 3-a liquid crystal layer; 4-drive electrode loading line; 5-a signal transmission line; 6-reference line.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a liquid crystal phase shifter, including:
the liquid crystal display panel comprises a first substrate 1, a second substrate 2 and a liquid crystal layer 3 arranged between the first substrate 1 and the second substrate 2;
a driving structure for influencing the dielectric constant of the liquid crystal layer 3 is formed on one side of the first substrate 1 facing the second substrate 2;
one side of the second substrate 2 facing the first substrate 1 is provided with a signal transmission line 5 and reference lines 6 arranged at two sides of the signal transmission line 5.
The liquid crystal phase shifter in this application, drive structure sets up on first base plate 1, and drive structure can produce the electric field that influences the dielectric constant that sets up liquid crystal layer 3 between first base plate 1 and second base plate 2, and then influences the speed that is located 5 interior signal transmission of signal transmission line on second base plate 2 to realize the function of shifting the phase. The arrangement mode avoids signal leakage caused by the condition that the driving structure and the microwave signal share the transmission line, saves a coupling DC isolator for isolating different DC offsets and reduces signal loss.
Wherein, the signal transmission line 5 and the reference lines 6 at both sides thereof form a CPW transmission structure.
As an alternative, the driving structure includes at least two driving electrode loading lines 4, and the extending paths of at least two driving electrode loading lines 4 are the same. Because the liquid crystal layer 3 rotates due to the driving voltage, the dielectric constant of the liquid crystal layer 3 is influenced to change, the driving voltage is generated between the driving electrode loading lines 4, and the extension paths of the two driving electrode loading lines 4 are the same, so that the stability of the driving voltage influencing the liquid crystal layer 3 can be ensured, the change of the dielectric constant is stable, and the change of the signal speed of the signal transmission line 5 is stable.
Referring to fig. 2 and fig. 3, it should be noted that at least two driving electrode loading lines 4 may be disposed in parallel or in an S-shape. As long as the voltage difference change between the two drive electrode application lines 4 is stable.
As an alternative, the driving electrode loading line 4 includes driving main lines, and a plurality of driving finger portions disposed on each of the driving main lines, the driving finger portions on two adjacent driving main lines extend in opposite directions, and the driving finger portions on two adjacent driving main lines are distributed in a staggered manner. The driving finger inserting portions arranged on each driving main line are distributed at equal intervals, the extending directions of every two opposite driving finger inserting portions are parallel to each other, the arrangement mode enables the dielectric constant of the liquid crystal layer 3 to be changed stably, and the structure can be more compact.
As an alternative, the projection of the drive structure on the second substrate 2 is located between two of the reference lines 6, or the projection of the drive structure on the second substrate 2 coincides with two of the reference lines 6. The driving structure and the two reference lines 6 are correspondingly arranged, so that the liquid crystal layer 3 influenced by the driving structure is positioned between the reference lines 6, the change of the dielectric constant is stable, the dielectric constant can be changed by relatively small voltage, and the signal transmission speed on the signal transmission line 5 is further changed.
Referring to fig. 4, as an alternative, the extending paths of the signal transmission line 5 and the reference line 6 are the same as the extending path of the driving electrode loading line 4. Since the signal transmission speed in the signal transmission line 5 is changed according to the voltage change of the driving electrode loading line 4, the signal transmission line 5 and the reference line 6 are arranged in the same path as the driving electrode loading line 4, so that the signal in the signal transmission line 5 can better sense the change of the dielectric constant of the liquid crystal layer, and the signal transmission speed change of the signal transmission line 5 is stable.
As an alternative, the reference line 6 includes reference main lines, and a plurality of reference finger portions disposed on each of the reference main lines, the plurality of reference finger portions on two adjacent reference main lines extend in opposite directions, and the plurality of reference finger portions on two adjacent reference main lines are distributed in a staggered manner to form a gap for routing the signal transmission line 5. This arrangement is used to facilitate control of the driving electrode loading lines 4 so that the reference lines 6 and the signal transmission lines 5 correspond to the layout of the driving electrode loading lines 4.
It should be noted that, when the two driving electrode loading lines 4 are arranged in parallel, the reference line 6 and the signal transmission line 5 are arranged in parallel, and the extending directions of the reference line 6 and the signal transmission line 5 are the same as the extending direction of the driving electrode loading line 4; when the two driving electrode loading lines 4 are arranged in an S shape, the reference line 6 and the signal transmission line 5 are arranged in an S shape, and the extending directions of the reference line 6 and the signal transmission line 5 are the same as the extending direction of the driving electrode loading line 4, so as to ensure the synchronism of the structures on the first substrate 1 and the second substrate 2.
As an alternative, the driving electrode loading line 4 is a metal electrode. Among them, the material of the metal electrode may be Cu, Ag, Al, and the like.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A liquid crystal phase shifter, comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer arranged between the first substrate and the second substrate;
a driving structure for changing the dielectric constant of the liquid crystal layer is formed on one side, facing the second substrate, of the first substrate;
and one side of the second substrate, which faces the first substrate, is provided with a signal transmission line and reference lines arranged on two sides of the signal transmission line.
2. The liquid crystal phase shifter of claim 1, wherein the driving structure comprises at least two driving electrode loading lines, and the extension paths of the at least two driving electrode loading lines are the same.
3. The liquid crystal phase shifter of claim 2, wherein at least two of the driving electrode loading lines are disposed in parallel.
4. The liquid crystal phase shifter of claim 2, wherein at least two of the driving electrode loading lines are disposed in an S-shape.
5. The liquid crystal phase shifter as claimed in claim 2, wherein the driving electrode loading line includes driving main lines, and a plurality of driving fingers disposed on each of the driving main lines, the plurality of driving fingers on two adjacent driving main lines extend in opposite directions, and the plurality of driving fingers on two adjacent driving main lines are alternately distributed.
6. A liquid crystal phase shifter as claimed in claim 1 wherein the projection of the drive structure onto the second substrate is between or coincident with two of the reference lines.
7. The liquid crystal phase shifter of claim 5, wherein the signal transmission line and the reference line extend along the same path as the driving electrode loading line.
8. The liquid crystal phase shifter as claimed in claim 7, wherein the reference line includes reference main lines, and a plurality of reference finger portions provided on each of the reference main lines, the plurality of reference finger portions on two adjacent reference main lines extend in opposite directions, and the plurality of reference finger portions on two adjacent reference main lines are staggered to form a gap for routing the signal transmission line.
9. The liquid crystal phase shifter of claim 2, wherein the driving electrode loading line is a metal electrode.
10. An electronic device comprising a liquid crystal phase shifter according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010222380.9A CN111273470B (en) | 2020-03-26 | 2020-03-26 | Liquid crystal phase shifter and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010222380.9A CN111273470B (en) | 2020-03-26 | 2020-03-26 | Liquid crystal phase shifter and electronic device |
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| CN111273470A true CN111273470A (en) | 2020-06-12 |
| CN111273470B CN111273470B (en) | 2023-04-18 |
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| CN202010222380.9A Active CN111273470B (en) | 2020-03-26 | 2020-03-26 | Liquid crystal phase shifter and electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022110013A1 (en) * | 2020-11-27 | 2022-06-02 | 京东方科技集团股份有限公司 | Phase shifter and antenna |
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| CN111273470B (en) | 2023-04-18 |
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