Dic Corporation

Ayaki Hosono

Masanao Hayashi

Tetsuo Kusumoto

Kenta Tojo

Masanori Miyamoto

Yoshio Aoki

Yutaka Kadomoto

Shinya Yamamoto

Hidetomo Kai

Shota Kosaka

Kento Kawakita

Kenta Shimizu

The compound is represented by general formula (i). In the compound, in a group K, at least two secondary carbon atoms in an alkyl group (a linear alkyl, halogenated alkyl, or cyanogenated alkyl group having 3 to 40 carbon atoms) are replaced with &#x2014;C(&#x2550;X)&#x2014; and/or &#x2014;CH(&#x2014;CN)&#x2014;, where Xis an oxygen atom, a sulfur atom, NH, or NR; in addition, a group A, a group A, or the group Kincludes, as a substituent, at least one P-Sp- group, where Pis a polymerizable group, and SPis a spacer group or a single bond. The liquid crystal composition including the compound represented by general formula (i) can be adsorbed onto substrates between which a liquid crystal layer is held, and, consequently, without the use of an alignment film, liquid crystal molecules can be maintained in a state in which the liquid crystal molecules are aligned in a vertical direction.

Polymerizable compound, and liquid crystal composition and liquid crystal display element in which the compound is used

The present invention provides a compound represented by the general formula (i), which has a partial structure Krepresented by one of the general formulae (K-1) to (K-6) and has a ring B with at least one P-Sp- group and with at least one R(Rdenotes a linear or branched alkyl group having 2 to 10 carbon atoms or a linear or branched halogenated alkyl group having 2 to 10 carbon atoms, &#x2014;CH&#x2014; in the alkyl or halogenated alkyl group is optionally substituted with &#x2014;CH&#x2550;CH&#x2014;, &#x2014;O&#x2014;, &#x2014;COO&#x2014;, or &#x2014;OCO&#x2014;, but &#x2014;O&#x2014; is not adjacent to another &#x2014;O&#x2014;). Thus, the compound in a liquid crystal composition adsorbs to substrates between which the liquid crystal composition (a liquid crystal layer) exists. The compound can hold vertically aligned liquid crystal molecules, can improve alignment stability, and can ensure low-temperature storage stability.

Polymerizable compound as well as liquid crystal composition and liquid crystal display device each including polymerizable compound

The present invention provides a compound represented by formula (i), a liquid crystal composition using the compound, and a liquid crystal display device using the liquid crystal composition. The compound represented by formula (i) has a partial structure Krepresented by any of general formulas (K-1) to (K-17) and further has ring B having at least two P-Sp- groups. Therefore, when used for a liquid crystal composition, the compound adsorbs to substrates sandwiching the liquid crystal composition (liquid crystal layer) and allows liquid crystal molecules to be held such that they are aligned in a vertical direction without a PI layer, and improved alignment stability and low-temperature storage stability can be achieved.

Polymerizable compound, and liquid crystal composition and liquid crystal display device using the same

Provided are a compound represented by the following general formula (1) and a liquid crystal composition containing the compound, and a liquid crystal display device or a light control device having the liquid crystal composition. The compound represented by general formula (1) has both a large dichroic ratio and high solubility in the host liquid crystal. In addition, it has excellent chemical stability at a level usable as a device. Therefore, by using the compound represented by general formula (1) as a component of a GH-type liquid crystal composition, it is possible to provide a liquid crystal display device or a light control device with high contrast.

Dichroic dye and liquid crystal composition

A compound represented by formula (i) has, as Kin the formula (i), a structure represented by any one of formula (K-1) to formula (K-3). When used in a liquid crystal composition, it adheres to substrates which hold the liquid crystal composition (liquid crystal layer) therebetween, thereby permitting liquid crystal molecules to be maintained in the state of being aligned in the vertical direction. The liquid crystal composition using the compound enables liquid crystal molecules to be aligned even when the PI layer is not provided (vertical alignment of liquid crystal molecules is induced without the voltage applied and horizontal alignment of liquid crystal molecules is realized with the voltage applied). It is possible to provide a polymerizable compound being excellent in storability and capable of uniform vertical alignment of liquid crystal molecules with no PI layer provided.

Polymerizable compound and liquid crystal composition

The present invention provides a compound represented by General Formula (I). The compound according to the present invention prevents the liquid crystal composition from being deteriorated due to light, has high compatibility with the liquid crystal composition, and does not impair the storage stability of the liquid crystal composition, thus the compound is useful as a constituent member of a liquid crystal composition. Since the liquid crystal composition and the liquid crystal display element containing the compound of the present invention exhibit UV resistance and have a high VHR, it is possible to obtain a liquid crystal display element with excellent display quality in which display defects such as burn-in and display unevenness do not occur or are suppressed. 

Growing community of inventors

Kita-adachi-gun, Japan

Ayaki Hosono