Liquid crystal display and fabrication method thereof
First Claim
1. A liquid crystal display, comprising:
- a first substrate;
a second substrate disposed opposite to the first substrate;
a light absorptive electrode layer disposed on the second substrate facing the first substrate;
a first cholesteric liquid crystal layer disposed between the first substrate and the second substrate, wherein the first cholesteric liquid crystal layer comprises a first chiral dopant;
a second cholesteric liquid crystal layer disposed between the first substrate and the second substrate, wherein the second cholesteric liquid crystal layer comprises a second chiral, dopant; and
wherein the first chiral dopant and the second chiral dopant have different optical activities andwherein the first chiral dopant and the second chiral dopant have the same chemical structure.
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Abstract
A liquid crystal display (LCD) and a fabrication method thereof are provided. The LCD includes a first substrate and a second substrate opposite to the first substrate. At least two layers of cholesteric liquid crystal layers are disposed between the first and the second substrates, wherein chiral dopants with different optical activities are respectively added in the cholesteric liquid crystal layers, and the chiral dopants have the same chemical structure. The fabrication method includes providing a first substrate and a second substrate opposite to the first substrate. A plurality of chiral dopants with different optical activities and having the same chemical structure are mixed into the same liquid crystal host respectively to form at least two kinds of cholesteric liquid crystal materials. Then, the cholesteric liquid crystal materials are disposed between the first and the second substrates to form at least two layers of cholesteric liquid crystal layers.
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Citations
20 Claims
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1. A liquid crystal display, comprising:
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a first substrate; a second substrate disposed opposite to the first substrate; a light absorptive electrode layer disposed on the second substrate facing the first substrate; a first cholesteric liquid crystal layer disposed between the first substrate and the second substrate, wherein the first cholesteric liquid crystal layer comprises a first chiral dopant; a second cholesteric liquid crystal layer disposed between the first substrate and the second substrate, wherein the second cholesteric liquid crystal layer comprises a second chiral, dopant; and wherein the first chiral dopant and the second chiral dopant have different optical activities and wherein the first chiral dopant and the second chiral dopant have the same chemical structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for fabricating a liquid crystal display, comprising:
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providing a first substrate; providing a second substrate disposed opposite to the first substrate; forming a light absorptive electrode layer on the second substrate facing the first substrate; providing a liquid crystal host; adding a pair of chiral, dopants having different optical activities into the liquid crystal host to form at least two kinds of cholesteric liquid crystal materials, wherein each chiral dopant of the pair of the chiral dopants has the same chemical structure; and disposing the at least two kinds of cholesteric liquid crystal materials between the first substrate and the second substrate to form at least two layers of cholesteric liquid crystal layers. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A liquid crystal display, comprising:
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a first substrate; a second substrate disposed opposite to the first substrate; a light absorptive electrode layer disposed on the second substrate facing the first substrate; a first cholesteric liquid crystal layer disposed between the first substrate and the second substrate, wherein the first cholesteric liquid crystal layer comprises a first chiral dopant; a second cholesteric liquid crystal layer disposed between the first substrate and the second substrate, wherein the second cholesteric liquid crystal layer comprises a second chiral dopant; and wherein the first chiral dopant and the second chiral dopant have different optical activities, wherein the first chiral dopant and the second chiral dopant have the same chemical structure, wherein the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer are a left-handed cholesteric liquid crystal layer and a right-handed cholesteric liquid crystal layer, respectively, wherein the first chiral dopant is a left-handed chiral dopant having a molecular stereostructure represented by Formula (III); - View Dependent Claims (20)
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Specification