US 9,436,033 B2Granted

Liquid-crystal lens

AssigneeNippon Electric Glass Co., Ltd.

InventorsMasaaki Kadomi, Hirokazu Tanaka, Masanori Wada, Takashi Akimoto

Life of this patent

Estimating the term…

Loading patent…

Abstract

Provided is a liquid-crystal lens with low wavefront aberration. A liquid-crystal lens (1) includes a liquid crystal layer (11), a first electrode (21), a second electrode (22), and a high-resistivity layer (41). The first electrode (21) includes: a first electrode portion (21a) including a circular opening (21a1) and a communicating cutout (21a2) formed therein, the communicating cutout (21a2) allowing the circular opening (21a1) to communicate with the outside; and a second electrode portion (21b) including a circular main electrode portion (21b1) disposed within the opening (21a1) and a leading electrode portion (21b2) connected to the main electrode portion (21b1) and disposed within the communicating cutout (21a2). The second electrode (22) faces the first electrode (21) with the liquid crystal layer (11) in between. The high-resistivity layer (41) is disposed between at least the second electrode portion (21b) of the first electrode (21) and the liquid crystal layer (11). The high-resistivity layer (41) has a shape rotationally symmetric about a central axis of the main electrode portion (21b1).

Claims2

Dependent claims

A liquid-crystal lens comprising:

a liquid crystal layer;
a first electrode including a first electrode portion and a second electrode portion, the first electrode portion including a circular main portion in which a circular opening is provided and a linear portion in which a communicating cutout is provided, the communicating cutout allowing the circular opening to communicate with the outside, the second electrode portion including a circular main electrode portion disposed within the circular opening and a leading electrode portion connected to the circular main electrode portion and disposed within the communicating cutout;
a second electrode facing the first electrode with the liquid crystal layer in between;
and
a high-resistivity layer interposed between at least the second electrode portion of the first electrode and the liquid crystal layer;
wherein
the high-resistivity layer has a shape rotationally symmetric about a central axis of the circular main electrode portion;
and
the high-resistivity layer extends to a region where the circular main portion of the first electrode portion is provided, and the high-resistivity layer is disposed on only part of the region where the circular main portion of the first electrode portion is provided.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/379,017Filed 4 Feb 2013
Priority: JP 2012-06219719 Mar 2012
Published: US 2015/0036096 A15 Feb 2015
Granted: 6 Sep 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G02F 1/133526
Structural association of cells with optical devices, e.g. polarisers or reflectors: lenses, e.g. microlenses or Fresnel lenses
G02F 1/29
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light…:…
G02F 1/294
For the control of the position or the direction of light beams, i.e. deflection: variable focal length devices
G02F 2201/12
Constructional arrangements not provided for in groups G02F1/00 - G02F7/00: electrode

Family

US 2015/0036096 A1Pre-grant publication · published 5 Feb 2015
US 9,436,033 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key