CN-121978860-A - Electrode structure and liquid crystal lens

CN121978860ACN 121978860 ACN121978860 ACN 121978860ACN-121978860-A

Abstract

The application provides an electrode structure and a liquid crystal lens, wherein the electrode structure comprises a plurality of concentric arc electrodes, the central angles of the arc electrodes are the same, the distances between any two adjacent arc electrodes in the radial direction are the same, and the adjacent arc electrodes are mutually connected to form a continuous spiral arc electrode. The application can not only effectively generate the voltage distribution similar to parabola, but also obviously reduce the electrode resistance compared with the traditional structure and improve the voltage holding capacity under the driving frequency, thereby enhancing the stability of the liquid crystal lens under the broadband driving.

Inventors

FENG WENBIN
HUO YINGDONG
PENG ZHIGANG
XU JIANYI
CHEN ZHANGYU
ZHOU JIANGUO
MA CHANGRONG
YANG XUEMENG

Assignees

南昌虚拟现实研究院股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260311

Claims (10)

1. The electrode structure is characterized by comprising a plurality of concentric arc electrodes, wherein the central angles of the arc electrodes are the same, the distances between any two adjacent arc electrodes in the radial direction are the same, and the adjacent arc electrodes are connected with each other to form a continuous spiral arc electrode.
2. The electrode structure of claim 1, wherein the arc length of the circular arc electrode is proportional to its arc radius.
3. The electrode structure of claim 1, wherein the circular arc electrode has a central angle in the range of 0-2 pi.
4. The electrode structure of claim 1, wherein both ends of the circular arc electrodes are connected by a conductive electrode so as to extend each of the circular arc electrodes and form a closed circle.
5. The electrode structure of claim 4, wherein each of said conductive electrodes is breakable once at any position.
6. The electrode structure of claim 4, wherein the conductive electrode is the same material as the circular arc electrode.
7. A liquid crystal lens, comprising the electrode structure according to any one of claims 1 to 6, further comprising an upper substrate and a lower substrate with a liquid crystal layer disposed therebetween; A plane electrode is arranged on the upper surface of the lower substrate, The electrode structure is arranged on the lower surface of the upper substrate and is used for realizing parabolic voltage distribution so as to control the spatial phase distribution of the liquid crystal layer; a driving electrode is arranged between the electrode structure and the upper substrate, and a first insulating layer is arranged between the driving electrode and the electrode structure; and a through hole is formed in the first insulating layer at a position corresponding to the central endpoint of the electrode structure, the driving electrode is electrically connected with the electrode structure through the through hole, and the driving electrode is used for driving the central endpoint of the electrode structure.
8. A liquid crystal lens according to claim 7, wherein the arc electrode is provided with a voltage smoothing layer on a side facing the liquid crystal layer and/or a voltage smoothing layer on a side facing the upper substrate.
9. A liquid crystal lens according to claim 7, wherein a side of the circular arc electrode facing the liquid crystal layer is provided with a second insulating layer for smoothing a phase distribution in the liquid crystal layer.
10. A liquid crystal lens according to claim 7, comprising two electrode structures according to any one of claims 1 to 6; Each of the electrode structures has a gap therein; the projections of the two electrode structures may mutually fill the gaps in the single electrode structure; a third insulating layer is arranged between the two electrode structures.

Description

Electrode structure and liquid crystal lens Technical Field The embodiments of the application belong to the technical field of liquid crystal lenses, and particularly relate to an electrode structure and a liquid crystal lens. Background The key to achieving an ideal parabolic phase distribution for a liquid crystal lens is to construct a corresponding parabolic voltage distribution in the liquid crystal layer. For example, patent CN117406503a and CN118140175A propose a design scheme based on patterned electrodes, which uses concentric electrodes to achieve the voltage distribution. However, in a large aperture liquid crystal lens, such concentric circular electrodes are susceptible to the variation of the driving voltage frequency due to the longer electrode length and the larger resistance, resulting in unstable liquid crystal performance, thereby causing the decrease of optical performance. Disclosure of Invention In order to solve or alleviate the problems in the prior art, the present application provides an electrode structure and a liquid crystal lens. The application can not only effectively generate parabolic voltage distribution, but also obviously reduce electrode resistance compared with the traditional structure and improve voltage holding capacity under driving frequency, thereby enhancing the stability of the liquid crystal lens under broadband driving. In a first aspect, an embodiment of the present application provides an electrode structure, where the electrode structure includes a plurality of concentric arc electrodes, central angles of the plurality of arc electrodes are the same, distances between any two adjacent arc electrodes in a radial direction are the same, and the adjacent arc electrodes are connected to each other to form a continuous spiral arc electrode. As a preferred embodiment of the present application, the arc length of the arc electrode is proportional to the arc radius thereof. As a preferred embodiment of the application, the central angle of the arc electrode ranges from 0 pi to 2 pi. As a preferred embodiment of the present application, both ends of the circular arc electrodes are connected by a conductive electrode so as to extend each of the circular arc electrodes and form a closed circle. As a preferred embodiment of the present application, each of the conductive electrodes may be broken at any position. As a preferred embodiment of the present application, the conductive electrode is made of the same material as the circular arc electrode. Compared with the prior art, the embodiment of the application provides an electrode structure, which comprises a plurality of concentric arc electrodes, wherein the central angles of the arc electrodes are the same, the distances between any two adjacent arc electrodes in the radial direction are the same, and the adjacent arc electrodes are mutually connected to form a continuous spiral arc electrode. The application can not only effectively generate the voltage distribution similar to parabola, but also obviously reduce the electrode resistance compared with the traditional structure and improve the voltage holding capacity under the driving frequency, thereby enhancing the stability of the liquid crystal lens under the broadband driving. In a second aspect, an embodiment of the present application further provides a liquid crystal lens, including the electrode structure according to any one of the first aspect, where the liquid crystal lens further includes an upper substrate and a lower substrate, and a liquid crystal layer is disposed between the upper substrate and the lower substrate; A plane electrode is arranged on the upper surface of the lower substrate, The electrode structure is arranged on the lower surface of the upper substrate and is used for realizing parabolic voltage distribution so as to control the spatial phase distribution of the liquid crystal layer; a driving electrode is arranged between the electrode structure and the upper substrate, and a first insulating layer is arranged between the driving electrode and the electrode structure; and a through hole is formed in the first insulating layer at a position corresponding to the central endpoint of the electrode structure, the driving electrode is electrically connected with the electrode structure through the through hole, and the driving electrode is used for driving the central endpoint of the electrode structure. As a preferred embodiment of the present application, a voltage smoothing layer is disposed on a side of the circular arc electrode facing the liquid crystal layer and/or a voltage smoothing layer is disposed on a side facing the upper substrate. As a preferred embodiment of the present application, a second insulating layer is disposed on a side of the circular arc electrode facing the liquid crystal layer, and the second insulating layer is used for smoothing a phase distribution in the liquid crystal layer. As a preferred embodiment