Liquid crystal display element

A technology for liquid crystal display elements and liquid crystal layers, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, can solve the problems of white spots and uneven orientation, and achieve the effect of preventing white spots and preventing decline.

Active Publication Date: 2020-12-04
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, the present invention provides a liquid crystal display element using an oxide semiconductor, which can prevent the decrease of the voltage holding ratio (VHR) of the liquid crystal layer and the increase of the ion density (ID), and solve the problem of white spots, uneven orientation, image sticking, etc. Liquid crystal display elements that display poor problems

Method used

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no. 1 approach ＞

[0038] A first preferred embodiment of the liquid crystal display element according to the present invention has a thin film transistor using an oxide semiconductor and a specific liquid crystal composition, and generates an electric field in a substantially vertical direction between the first substrate and the second substrate of the liquid crystal display element. Liquid crystal display element. The first preferred embodiment is a liquid crystal display element having electrodes on a first substrate and a second substrate, for example, a transmissive liquid crystal display element using a VA (Vertical Alignment: Vertical Alignment) type.

[0039] The first preferred embodiment of the liquid crystal display element according to the present invention preferably has a first substrate and a second substrate arranged to face each other, and a liquid crystal layer containing a liquid crystal composition is sandwiched between the first substrate and the second substrate, It also h...

no. 2 approach ＞

[0251] The second embodiment of the liquid crystal display element according to the present invention is a liquid crystal display element having a thin film transistor using an oxide semiconductor and a specific liquid crystal composition, and generating an electric field having a component parallel to the substrate surface of the liquid crystal display element. . The second preferred embodiment is an IPS type liquid crystal display element (In Plane Switching mode Liquid Crystal Display) or an FFS type liquid crystal display element (Fringe Field Switching mode Liquid Crystal Display element (Fringe Field Switching mode Liquid Crystal Display element) as a kind of IPS type liquid crystal display element. Crystal Display).

[0252] An IPS type liquid crystal display element which is a second preferred embodiment of the liquid crystal display element according to the present invention has a first substrate and a second substrate arranged to face each other, and a substrate cont...

no. 3 approach ＞

[0275] The configuration of the third embodiment according to the present invention is a liquid crystal display element having a thin film transistor using an oxide semiconductor and a specific liquid crystal composition, preferably on the same substrate as the first substrate on which the electrode layer 3 including the thin film transistor is formed. A color filter 6 is formed on the side. This approach is generally referred to as color filter on array (COA) or the like. Below, use Figure 10 and Figure 11 A specific structure will be described. Figure 10 It is another form of the cross-sectional view obtained by cutting the liquid crystal display element. The composition of the liquid crystal composition is to form the first substrate 2 with alignment layer 4, thin film transistors (11, 13, 15, 16, 17), color filter 6 and pixel electrode 21 on the surface, and the first substrate 2 formed on the surface The second substrate 7 of the alignment layer 4 is spaced apart so ...

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Abstract

The present invention provides a liquid crystal display element, which has a first substrate and a second substrate arranged oppositely, a liquid crystal layer containing a liquid crystal composition is sandwiched between the first substrate and the second substrate, and a liquid crystal layer provided on the first substrate. A thin film transistor on a substrate, and a pixel electrode driven by the transistor and made of a transparent conductive material, the thin film transistor has a gate electrode, an oxide semiconductor layer provided with the gate electrode through an insulating layer, and a conductive layer connected to the oxide semiconductor layer. The source electrode and the drain electrode are generally arranged, and the liquid crystal composition contains one or more than two kinds of compounds selected from the compounds represented by general formula (LC3) ~ general formula (LC5) and one or more than two kinds of compounds selected from A compound among compounds represented by general formula (II-a) to general formula (II-f).

Description

technical field [0001] The present invention relates to liquid crystal display elements. Background technique [0002] Liquid crystal display devices are used in various home appliances, measuring instruments, automotive panels, word processors, electronic notebooks, printers, computers, televisions, etc., starting from clocks and calculators. Examples of liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, DS (Dynamic Light Scattering) type, GH (Guest-Host) type, and IPS (In-Plane Switching) type. , FFS (Fringe Field Switching) type, OCB (Optically Compensated Birefringence) type, ECB (Voltage Controlled Birefringence) type, VA (Vertical Alignment) type, CSH (Color Super Vertical Alignment) type, or FLC (Ferroelectric LCD), etc. In addition, as a driving method, it is common to change from static driving to multiplexing driving in the past, and a simple matrix method, and recently, an active matrix (AM) method using TFT (thin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1368
CPCC09K19/0403C09K19/322C09K2019/0448C09K2019/325G02F1/133738G02F1/133746C09K19/3003C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016G02F1/133365G02F1/1337G02F1/134309G02F1/13439G02F1/136286G02F1/1368G02F2202/10
Inventor 小川真治岩下芳典
Owner DIC CORP
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