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Liquid crystal display element

A liquid crystal display element, liquid crystal technology, applied in static indicators, optics, instruments, etc., can solve problems such as orientation disorder and complicated manufacturing process, and achieve the effect of avoiding adverse phenomena

Inactive Publication Date: 2011-07-27
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, if the temperature is raised again above the phase transition point, orientation disorder occurs, and the manufacturing process becomes complicated, and there are problems such as that orientation disorder occurs in the portion between the pixel electrodes where no electric field is applied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0292] The two glass substrates on which the ITO electrodes were formed were thoroughly washed, and 2% by mass cyclopentanone of a photodimerization type material (manufactured by Rolic Technologies, trade name: ROP103) was spin-coated on one of the glass substrates at a rotation speed of 1500 rpm. Solution for 15 seconds, after drying at 130°C for 15 minutes, irradiate at about 100mJ / cm 2 Linearly polarize ultraviolet rays for orientation treatment. Polyimide (manufactured by Nissan Chemical Industries, Ltd., trade name: SE-5291) was printed on the other substrate, and rubbed to form an alignment film.

[0293] A 1.5 μm bead spacer was sprinkled on one substrate, and a sealant was applied to the other substrate using a sealant dispenser. Then, the two substrates were opposed so that the respective orientation treatment directions were parallel, and thermocompression bonding was performed to produce an empty liquid crystal cell.

[0294] Then, use a ferroelectric liquid crys...

Embodiment 2

[0297] The two glass substrates on which the ITO electrodes were formed were thoroughly washed, and 2% by mass cyclopentanone of a photodimerization type material (manufactured by Rolic Technologies, trade name: ROP103) was spin-coated on one of the glass substrates at a rotation speed of 1500 rpm. Solution for 15 seconds, after drying at 130°C for 15 minutes, irradiate at about 100mJ / cm 2 Linearly polarize ultraviolet rays for orientation treatment. Polyimide (manufactured by Nissan Chemical Industries, Ltd., trade name: SE-7992) was printed on the other substrate, and rubbed to form an alignment film.

[0298] A 1.5 μm bead spacer was sprinkled on one substrate, and a sealant was applied to the other substrate using a sealant dispenser. Then, the two substrates were opposed so that the respective orientation treatment directions were parallel, and thermocompression bonding was performed to produce an empty liquid crystal cell.

[0299] Then, use a ferroelectric liquid crys...

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Abstract

There is provided a liquid crystal display element using a monostable ferroelectric liquid crystal and capable of controlling the orientation of the spontaneous polarization of the ferroelectric liquid crystal. The liquid crystal display element comprises a first alignment-treated substrate having a first alignment film that is a rubbed film, a second alignment-treated substrate having a second alignment film that is a photo-alignment film using a photodimerization type material, and a liquid crystal layer formed between the first alignment-treated substrate and the second alignment-treated substrate, including a ferroelectric liquid crystal. The ferroelectric liquid crystal exhibits monostability, and when a voltage is applied so that the second electrode layer of the second alignment-treated substrate serves as a negative electrode, the molecular orientation changes about twice as much as the tilt angle in parallel with the substrate surface.

Description

technical field [0001] The present invention relates to a liquid crystal display element using a monostable ferroelectric liquid crystal having spontaneous polarization. Background technique [0002] Since liquid crystal display elements are thin and have low power consumption, they can be used in a wide range of applications from large displays to portable information terminals, and their development is active. So far, as liquid crystal display elements, TN mode, multiplex drive of STN, active matrix drive using thin-layer transistor (TFT) on TN, etc. have been developed and put into practical use, but since they use nematic liquid crystal , so the response speed of the liquid crystal material is slow, ranging from several ms to tens of ms, which cannot fully adapt to animation display. [0003] The response speed of ferroelectric liquid crystal (FLC) is extremely short, on the order of μs, and it is a liquid crystal suitable for high-speed devices. As we all know, the fe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/141G02F1/1337G02F1/133G09G3/36
CPCG09G2310/0235G02F2001/133773G02F1/141G09G3/3651G02F1/133788G09G2300/0426G02F1/133723G02F1/133773G02F1/1337G02F1/133
Inventor 猿渡直子冈部将人
Owner DAI NIPPON PRINTING CO LTD
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