US 12,092,911 B2
Method for producing liquid crystal material, method for evaluating liquid crystal material, measurement apparatus therefor, and liquid crystal material
Tsuyoshi Sasaki, Kitaadachi-gun (JP)
Assigned to DIC CORPORATION, Tokyo (JP)
Appl. No. 18/036,334
Filed by DIC Corporation, Tokyo (JP)
PCT Filed Dec. 16, 2021, PCT No. PCT/JP2021/046417
§ 371(c)(1), (2) Date May 10, 2023,
PCT Pub. No. WO2022/145248, PCT Pub. Date Jul. 7, 2022.
Claims priority of application No. 2020-219499 (JP), filed on Dec. 28, 2020.
Prior Publication US 2023/0400721 A1, Dec. 14, 2023
Int. Cl. G02F 1/13 (2006.01); C09K 19/38 (2006.01)
CPC G02F 1/1309 (2013.01) [C09K 19/38 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for producing a liquid crystal material comprising:
a step (I) of preparing a liquid crystal material; and
a step (II) of measuring the liquid crystal material with a delta delay measurement mechanism that measures a delta delay value of the liquid crystal material, wherein
the delta delay measurement mechanism includes a single coaxial tube and a mechanism that calculates the delta delay value of the liquid crystal material,
the single coaxial tube includes a linear inner conductor and an outer conductor having a space through which the inner conductor extends,
the delta delay value is a difference between a transmission delay time to and a transmission delay time tv,
the transmission delay time to is measured by propagating electromagnetic waves through the liquid crystal material in a state in which a reference voltage V0 is applied between the inner conductor and the outer conductor, the electromagnetic waves having successively varying frequencies, the liquid crystal material being loaded in the space between the inner conductor and the outer conductor, and
the transmission delay time tv is measured by propagating the electromagnetic waves through the liquid crystal material in a state in which an effective voltage V, which is greater than the reference voltage V0, is applied between the inner conductor and the outer conductor.
 
5. A method for measuring a delta delay comprising using a single coaxial tube that includes a linear inner conductor and an outer conductor having a space through which the inner conductor extends, the delta delay being an amount of change in a transmission delay time associated with electromagnetic waves propagating through a liquid crystal material loaded in the space, the method comprising:
a step of providing the liquid crystal material;
a step of loading the liquid crystal material between the inner conductor and the outer conductor; and
a step of calculating a delta delay value of the liquid crystal material, the delta delay value being a difference between a transmission delay time to and a transmission delay time tv, wherein the transmission delay time t0 is measured by propagating electromagnetic waves through the liquid crystal material in a state in which a reference voltage V0 is applied between the inner conductor and the outer conductor, the electromagnetic waves having successively varying frequencies, and the transmission delay time tv is measured by propagating the electromagnetic waves through the liquid crystal material in a state in which an effective voltage V, which is greater than the reference voltage V0, is applied between the inner conductor and the outer conductor.
 
6. An apparatus for measuring a delta delay value comprising:
a single coaxial tube including a linear inner conductor, an outer conductor through which the inner conductor internally extends, and a space that is located between the inner conductor and the outer conductor and in which a liquid crystal material is loadable;
an electrical signal transmitting and receiving unit that inputs electrical signals that are electromagnetic waves to the single coaxial tube and receives output signals that are electromagnetic waves output in response to the electrical signals; and
an analysis and processing unit that analyzes and processes the electrical signals and the output signals transmitted or received by the electrical signal transmitting and receiving unit, wherein
the analysis and processing unit calculates the delta delay value of the liquid crystal material,
the delta delay value is a difference between a transmission delay time to and a transmission delay time tv,
the transmission delay time to is a time measured by propagating electromagnetic waves through the liquid crystal material in a state in which a reference voltage V0 is applied between the inner conductor and the outer conductor, the electromagnetic waves having successively varying frequencies, and
the transmission delay time tv is a time measured by propagating the electromagnetic waves through the liquid crystal material in a state in which an effective voltage V, which is greater than the reference voltage V0, is applied between the inner conductor and the outer conductor.