Liquid crystal display element and light-modulating material
AssigneeFUJIFILM Corporation
InventorsTakashi Kato, Koji Takaku
Life of this patent
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Abstract
The invention provides a liquid crystal display element and a light-modulating material each containing at least one low molecular weight gelling agent, at least one dichroic dye having a substituent represented by formula (1) and at least one host liquid crystal between a pair of electrodes at least one of which is a transparent electrode. Representations in formula (1) are: Het, O or S; B1 and B2, divalent arylene, heteroarylene or alicyclic hydrocarbon group; Q1, divalent linking group; C1, alkyl, cycloalkyl, alkoxy, alkoxycarbonyl, acyl or acyloxy group; j, 0 or 1; p, q and r, an integer 0 to 5; n, an integer 1 to 3; and (p+r)×n is an integer 3 to 10. -(Het)j-[(B1)p-(Q1)q-(B2)r]n-C1 Formula (1)
Claims16
A liquid crystal display element that is a layered member comprising:
- a liquid crystal layer, provided between a pair of electrodes, at least one of which is a transparent electrode, and the liquid crystal layer including at least one low molecular weight gelling agent, at least one dichroic dye having a substituent represented by formula (1) and at least one host liquid crystal;
- and a reflection layer;
- the liquid crystal display element displaying an image by reflecting incident light
- -(Het)j-[(B1)p-(Q1)q-(B2)r]n-C1 Formula (1)
- wherein, in forumla (1), Het represents an oxygen atom or a sulfur atom;
- B1 and B2 each independently represent a divalent arylene group, a heteroarylene group or a divalent alicyclic hydrocarbon group;
- Q1 represents a divalent linking group;
- C1 represents an alkyl group, a cycloalky group, an alkoxy group, an alkoxycarbonyl group, an acyl group or an acyloxy group;
- j represents 0 or 1;
- p, q and r each independently represent an integer of to 0 to 5;
- n represents an integer of 1 to 3;
- (p+r)×n is an integer of 3 to 10;
- when p is 2 or larger, two or more groups represented by B1 may be the same or different;
- when q is 2 or larger, two or more groups represented by Q1 may be the same or different;
- when r is 2 or larger, two or more groups represented by B2 may be the same or different;
- and when n is 2 or larger, two or more groups represented by [(B1)p-(Q1)q-(B2)r] may be the same or different,
- the low molecular weight gelling agent having (i) a linear (per) fluoroalkyl group having 4 to 20 carbon atoms that may be substituted at a terminal, (ii) a linear alky group having 4 to 20 carbon atoms that may be substituted at another terminal, and (iii) at least two hydrogen-bonding groups.
A light modulating material comprising a liquid crystal layer, provided between a pair of electrodes and containing at least one low molecular weight gelling agent, at least one dichroic dye having a substituent represented by formula (1) and at least one host liquid crystal;
- the light-modulating material transmitting incident light and changing a transmittance thereof:
- -(Het)j-[(B1)p-(Q1)q-(B2)r]n-C1 Formula (1)
- wherein, in formula (1), Het represents an oxygen atom or a sulfur atom;
- B1 and B2 each independently represent a divalent arylene group, a heteroarylene group or a divalent alicylic hydrocarbon group;
- Q1 represents a divalent linking group;
- C1 represents an aklyl group, a cycloalkyl group, an alkoxy group, an alkoxycarbon group, an acyl group or an acyloxy group;
- j represents 0 or 1;
- p, q and r each independently represent an integer of 0 to 5;
- n represents an integer of 1 to 3;
- (p+r)×n is an integer of 3 to 10;
- when p is 2 or larger, two or more groups represented by B1 may be the same or different;
- when q is 2 or larger, two or more groups represented by Q1 may be the same or different;
- when r is 2 or larger, two or more groups represented by B2 may be the same or different;
- and when n is 2 or larger, two or more groups represented by [(B1)p-(Q1)q-(B2)r] may be the same or different,
- the low molecular weight gelling agent having (i) a linear (per) fluoroalkyl group having 4 to 20 carbon atoms that may be substituted at a terminal, (ii) a linear alkyl group having 4 to 20 carbon atoms that may be substituted at another terminal, and (iii) at least two hydrogen-bonding groups.
Dependencies are inferred from the claim text.