CN-224232066-U - Liquid crystal phase shifter

CN224232066UCN 224232066 UCN224232066 UCN 224232066UCN-224232066-U

Abstract

The application provides a liquid crystal phase shifting device which comprises a first substrate, a second substrate, a plurality of retaining walls, a plurality of liquid crystal layers and a deformation film. The first substrate is provided with a plurality of through holes and a plurality of elastic films, and the elastic films cover the through holes. The second substrate is combined with the first substrate into a whole. The retaining walls are arranged between the first base plate and the second base plate, and enclose a plurality of closed accommodating spaces with the first base plate and the second base plate. The plurality of liquid crystal layers are disposed in the plurality of accommodation spaces, and the liquid crystal layers include liquid crystal molecules. The deformation film is arranged on the second substrate and comprises a plurality of deformation parts, the deformation parts are arranged in a plurality of accommodating spaces, the deformation parts deform when receiving control voltage, and the thickness of the liquid crystal layer in the accommodating spaces is changed. The through hole is used for enabling liquid crystal molecules to overflow from the accommodating space when the deformation part deforms, and the elastic film is used for accommodating the liquid crystal molecules overflowing from the through hole. The liquid crystal phase shifting device can realize various liquid crystal layer thicknesses between two non-spliced substrates.

Inventors

ZHANG BOLONG
XIANG CHANGMING

Assignees

深圳市华星光电半导体显示技术有限公司

Dates

Publication Date: 20260512
Application Date: 20250507

Claims (10)

1. A liquid crystal phase shifting device, comprising: The first substrate is provided with a plurality of through holes, and comprises a plurality of elastic films, and the elastic films cover the through holes; A second substrate integrally combined with the first substrate, the second substrate including a deformation film; A plurality of retaining walls arranged between the first substrate and the second substrate, the retaining walls, the first substrate and the second substrate enclosing a plurality of closed accommodation spaces, and A plurality of liquid crystal layers disposed in the plurality of accommodation spaces, the liquid crystal layers including liquid crystal molecules; The deformation film comprises a plurality of deformation parts, the deformation parts are arranged in the accommodation spaces, the deformation parts are used for deforming when receiving control voltage so as to change the thickness of the liquid crystal layer in the accommodation spaces, the through holes are used for enabling the liquid crystal molecules to overflow from the accommodation spaces when the deformation parts deform, and the elastic film is used for accommodating the liquid crystal molecules overflowing from the through holes.
2. The liquid crystal phase shifting device of claim 1, wherein the first substrate comprises a first substrate, a first electrode layer disposed on the first substrate, and a first alignment film; The second substrate comprises a second substrate, a second electrode layer, a common electrode layer and a second alignment film, wherein the second electrode layer, the common electrode layer and the second alignment film are arranged on the second substrate; wherein the deformation film is disposed between the second electrode layer and the common electrode layer.
3. The liquid crystal phase shifting device of claim 2, wherein the via hole comprises: a first through hole penetrating the first substrate; A second via penetrating the first electrode layer, and A third through hole penetrating the first alignment film; wherein the first through hole, the second through hole and the third through hole are communicated.
4. The liquid crystal phase shifting device according to claim 3, wherein the elastic film is attached to a surface of the first substrate facing away from the first electrode layer, and the elastic film covers the first through hole.
5. The liquid crystal phase shifting device according to claim 2, wherein the second electrode layer comprises a plurality of second electrodes, and the second electrodes are disposed in a space surrounded by the retaining wall; the deformation part is arranged on the second electrode; The common electrode layer comprises a plurality of common electrodes, the common electrodes are arranged in the space surrounded by the retaining wall, and the common electrodes are arranged on the deformation part; The second alignment film comprises a plurality of alignment parts, wherein the alignment parts are arranged on the common electrode and are arranged in a space surrounded by the retaining wall.
6. The liquid crystal phase shifting device of claim 5, wherein one end of the retaining wall is disposed on the first substrate and the other end is disposed on the second substrate.
7. The liquid crystal phase shifting device according to claim 6, wherein one end of the retaining wall is located at a gap between two adjacent first electrodes of the first electrode layer, and the other end of the retaining wall is located at a gap between two adjacent second electrodes.
8. The liquid crystal phase shifting device of claim 5, wherein one end of the retaining wall is disposed on the first alignment film of the first substrate and the other end is disposed on the second substrate.
9. The liquid crystal phase shifting device of claim 8, wherein one end of the retaining wall is located on the first alignment film, and the other end of the retaining wall is located at a gap between two adjacent second electrodes.
10. The liquid crystal phase shifting device of claim 1, wherein the elastic film is a transparent film.

Description

Liquid crystal phase shifter Technical Field The application relates to the technical field of microwave phased array antennas, in particular to a liquid crystal phase shifting device. Background The microwave phased array antenna has the advantages of fast beam scanning, no motion inertia, strong anti-interference capability, high reliability and the like, and has increasingly obvious advantages in a communication system. The performance of the liquid crystal phase shifting device as a core component in a microwave phased array antenna directly affects the efficiency of the communication system. The liquid crystal phase shifting device has the advantages of low cost, low control voltage, excellent high-frequency characteristic, easy planar integration, wide working frequency range, small volume, low section, stable performance and the like. The phase shift phase of the liquid crystal phase shift device is in direct proportion to the refractive index of the liquid crystal and the thickness of the liquid crystal layer, and when the refractive index of the liquid crystal layer is unchanged, the phase shift phase is in direct proportion to the thickness of the liquid crystal layer. However, the conventional liquid crystal phase shifting device is formed by splicing a plurality of phase shifting units, and each phase shifting unit corresponds to the thickness of a different liquid crystal layer to realize the phase transfer of electromagnetic waves. The prior art cannot realize the manufacture of phase shift units with various thicknesses of liquid crystal layers on the same substrate. In the prior art, phase shifting units with different liquid crystal layer thicknesses are usually manufactured, and then the phase shifting units are spliced together, and the splicing mode is complex in process, and cutting and module assembly are also needed, so that the manufacturing cost is increased, and the production efficiency is reduced. Therefore, a new solution is needed to solve the above-mentioned problems. Disclosure of utility model An object of an embodiment of the present application is to provide a liquid crystal phase shifting device, which aims to realize the thickness of a plurality of different liquid crystal layers between two non-spliced substrates, thereby simplifying the manufacturing process and reducing the manufacturing cost. The embodiment of the application provides a liquid crystal phase shifting device, which comprises a first substrate, a second substrate, a plurality of retaining walls, a plurality of liquid crystal layers and a plurality of liquid crystal layers, wherein the first substrate is provided with a plurality of through holes, the first substrate comprises a plurality of elastic films, the elastic films cover the through holes, the second substrate is combined with the first substrate into a whole and comprises a deformation film, the retaining walls are arranged between the first substrate and the second substrate, the retaining walls, the first substrate and the second substrate enclose a plurality of closed accommodating spaces, the liquid crystal layers are arranged in the accommodating spaces, the liquid crystal layers comprise liquid crystal molecules, the deformation film comprises a plurality of deformation parts, the deformation parts are arranged in the accommodating spaces, the deformation parts are used for deforming when receiving control voltages so as to change the thickness of the liquid crystal layers positioned in the accommodating spaces, and the through holes are used for enabling the liquid crystal molecules to overflow from the accommodating spaces when the deformation parts deform, and the liquid crystal molecules overflow from the elastic films. In the liquid crystal phase shifting device, the first substrate comprises a first substrate, a first electrode layer and a first alignment film, wherein the first electrode layer and the first alignment film are arranged on the first substrate, the second substrate comprises a second substrate, a second electrode layer, a common electrode layer and the second alignment film, the second electrode layer, the common electrode layer and the second alignment film are arranged on the second substrate, and the deformation film is arranged between the second electrode layer and the common electrode layer. In the liquid crystal phase shifting device, the through holes comprise a first through hole penetrating through the first substrate, a second through hole penetrating through the first electrode layer and a third through hole penetrating through the first alignment film, wherein the first through hole, the second through hole and the third through hole are communicated. In the liquid crystal phase shifting device, the elastic film is attached to a surface of the first substrate, which is opposite to the surface provided with the first electrode layer, and the elastic film covers the first through hole. In the liquid crystal