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Liquid crystal lens

A liquid crystal lens and lens technology, applied in liquid crystal materials, optics, instruments, etc., can solve the problems of slow response, insufficient stability, high operating voltage, etc., and achieve the effects of reducing crosstalk, improving clarity, and high birefringence.

Pending Publication Date: 2021-02-12
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] The hitherto known LC compositions present serious disadvantages for the use envisaged here
Among other drawbacks, most of them lead to disadvantageously small modulations of the optical response, slow response or insufficient addressability, require high operating voltages or insufficient stability, especially against UV radiation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0491] The following examples illustrate the invention without limiting it in any way. However, it becomes clear to those skilled in the art what properties are achievable by physical properties and to what extent they can be modified. In particular, combinations of properties which can preferably be achieved are therefore well defined for the person skilled in the art.

[0492] Nematic liquid crystal mixtures C1, C2 and N1 to N12 were prepared as follows:

Embodiment N1

[0499]

Embodiment N2

[0501]

[0502]

[0503] Mediums N3 to N6 were prepared from medium N2 by adding a stabilizer selected from ST-16, ST-3a-1, ST-3b-1 and ST-8-1 in the amounts given in the table below.

[0504]

[0505]

[0506] The LC zoom lens equipped with one of the media N1 to N12 has a shorter minimum focal length and lower driving voltage than the zoom lens equipped with the media C1 or C2.

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Abstract

The invention relates to a liquid crystal (LC) lens and a liquid crystal medium for the LC lens, wherein the medium comprises one or more compounds represented by formulas I and II, and the groups andparameters present have the meanings given in claim 1.

Description

technical field [0001] The present invention relates to liquid crystal (LC) lenses, LC media for liquid crystal lenses and devices comprising LC lenses according to the invention. Background technique [0002] Electrically tunable liquid crystal lenses potentially offer important advantages in size and cost compared to mechanical zoom lenses. Possible applications are cameras, sensors, binoculars and other optoelectronic devices. The advantages are based on the properties of liquid crystal lenses, such as small size (i.e. thin shape), electrically tunable optical zoom, fast response and low power consumption. [0003] Usually, a camera, a mobile phone camera or a 3D image processing device is provided with a zoom lens for magnifying or minimizing an image. Conventional objectives include multiple lens groups. By moving the lens groups along the optical axis, the distance between the lens groups is changed to change the focal length. This type of lens requires a longer di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/46G02F1/29G02B30/28
CPCC09K19/46G02F1/29
Inventor 张哲维张智杰周光廷
Owner MERCK PATENT GMBH