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Liquid crystal composition and liquid crystal display

A technology of liquid crystal composition and liquid crystal compound, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, and can solve problems such as cracking, low resistance of olefinic compounds, and reduced voltage retention rate

Inactive Publication Date: 2019-08-16
SHARP KK +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a liquid crystal display (LCD) using such a liquid crystal composition is used for a long period of time, there is a problem of image sticking.
Especially in PSA (Polymer Stabilized Alignment) technology, image sticking is prone to occur due to the decrease of voltage holding ratio (VHR)
This is considered to be because, in the PSA technology, light irradiation is performed to form an orientation control layer, but the resistance of ethylenic compounds to ultraviolet light is low, and degradation such as cracking occurs due to exposure

Method used

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  • Liquid crystal composition and liquid crystal display
  • Liquid crystal composition and liquid crystal display
  • Liquid crystal composition and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0220]

[0221] according to figure 1and figure 2 Embodiment 1 will be described. In this embodiment, a liquid crystal display (liquid crystal display device) having a panel-shaped liquid crystal cell provided with a conventional alignment film is exemplified.

[0222] [LCD Monitor]

[0223] The liquid crystal display of the present embodiment can be used for a television receiver, and furthermore, a personal computer, a tablet terminal, a display of a mobile phone, a monitor, and the like.

[0224] The liquid crystal display includes a panel-shaped liquid crystal cell (liquid crystal panel). The liquid crystal display may be of any type such as a transmissive type, a reflective type, etc. In the case of a transmissive type, it is further provided with: a non-conductive device for supplying light to the liquid crystal cell, which is arranged on the back side of the liquid crystal cell (array substrate side described later) The illustrated backlight unit. In the case o...

Embodiment approach 2

[0246]

[0247] according to image 3 and Figure 4 Embodiment 2 will be described. In this embodiment mode, a so-called conventional type alignment film-free liquid crystal display is exemplified. In this specification, the conventional alignment film refers to an alignment film formed by coating a resin made of polyimide or the like on a substrate as described above.

[0248] [LCD Monitor]

[0249] The liquid crystal display of the present embodiment can be used for a television receiver, and furthermore, a personal computer, a tablet terminal, a display of a mobile phone, a monitor, and the like.

[0250] The liquid crystal display includes a panel-shaped liquid crystal cell (liquid crystal panel). The liquid crystal display may be of any type such as a transmissive type, a reflective type, etc. In the case of a transmissive type, it is further provided with: a non-conductive device for supplying light to the liquid crystal cell, which is arranged on the back side of ...

Embodiment

[0268] Hereinafter, the present invention will be described in more detail with reference to Examples and the like, but the present invention is not limited by the following Examples and the like.

[0269] It should be noted that the percentages are percentages by weight. All temperatures are expressed in degrees Celsius. The N-I transition point represents the nematic isotropic phase transition temperature, and Δn represents the optical anisotropy (589 nm, 25° C.). Δε represents dielectric constant anisotropy.

[0270] The structures and abbreviations of cyclohexane compounds, liquid crystal compounds, and polymerizable compounds used in Examples are as follows.

[0271] Cyclohexane compound (A) of formula [I]

[0272]

[0273]

[0274] Polymerizable compound (C) of formula [II]

[0275]

[0276] Comparative Cyclohexane Compounds

[0277]

[0278] Comparative Polymeric Compounds

[0279]

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Abstract

The present invention relates to a liquid crystal composition and a liquid crystal display. A liquid crystal composition comprises (A) a cyclohexane compound of the formula [I]; (R, R' each independently represents a linear alkyl group having 1 to 6 carbon atoms.); (B) a liquid crystal compound other than the above (A); (C) at least one polymerizable compound selected from the group consisting ofpolymerizable compounds of the formula [II] and polymerizable compounds of the formula [III], P1-Sp1-E-Sp2-P2 [II] (P1 and P2 represent acryloyloxy group or the like, Sp1 and Sp2 represent alkyleneoxygroup or direct bond, and E represents arylene group.); A-(L-W)i-(M-Z)j-(N)k-B [III] (A and B represent P-Q- or the like, P represents a polymerizable group, Q represents a spacer group or a single bond, i L and k N represent phenylene or the like, j M represents phenylene or the like, i W and j Z represent O or the like, i and k represent 0 or 1, i+k>0, j represents 0, 1, 2 or 3, and N represents 1, 2, 3 or 4.) optionally selecting a compound containing (D) a photopolymerization initiator.

Description

technical field [0001] The present invention relates to a liquid crystal composition containing a specific cyclohexane compound and a polymerizable compound, and a liquid crystal display using the liquid crystal composition. Background technique [0002] Many liquid crystal compounds utilizing optical anisotropy (Δn) (hereinafter sometimes referred to as "Δn") and dielectric constant anisotropy (Δε) (hereinafter sometimes referred to as "Δε") that are characteristic of liquid crystal compounds have been manufactured. Liquid crystal display elements have been used in clocks, calculators, measuring equipment, automotive panels, word processors, electronic notebooks, mobile phones, printers, computers, TVs, and the like. A liquid crystal phase unique to the liquid crystal compound used in the liquid crystal display element exists, and its phase form is roughly classified into a nematic phase, a smectic phase, and a cholesteric phase. Among them, the nematic phase is most widel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/52G02F1/1337
CPCC09K19/52G02F1/133723C09K2019/3004C09K19/3003C09K2019/161C09K19/16C09K2019/0448C09K2019/3009C09K2019/122C09K2019/301C09K2019/3016C09K2019/3027C09K19/32C09K19/12C09K2019/548C09K19/542
Inventor 水崎真伸冈崎敢寺冈优子冈本一男柴田俊博
Owner SHARP KK