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| Autostereoscopic display having a high resolution 2D mode |
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| N x N switch array with reduced components |
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| Environmental magnetism compensating device and cathode-ray tube display device |
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| Laser scanner driving apparatus |
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| Low driving voltage polymer dispersed liquid crystal display device with conductive nanoparticles |
| OF THE PREFERRED EMBODIMENT While the specification concludes with claims defining the features of ... |
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| Multi-spot modulator using a laser diode |
| Referring now to FIG. 1, the preferred embodiment consists of a laser diode 1, a focussing lens 2 ... |
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Liquid crystal display device, method for producing the same, and projection-type display apparatus including the liquid crystal display device
| Details |
Inventors: Nakao, Kenji; Yamamoto, Masao; Uemura, Tsuyoshi;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP)
Primary Examiner: Sikes; William L.
Assistant Examiner: Nguyen; Tiep H.
Attorney, Agent or Firm: Ratner & Prestia
A liquid crystal display device includes a pair of substrates; a liquid crystal layer interposed between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer. The liquid crystal layer includes a polymer dispersed liquid crystal material having a polymer phase and a liquid crystal phase, and fulfills the conditions represented by: 2.585.multidot.d.sup.(-1/3) -0.3<R<2.585.multidot.d.sup.(-1/3) +0.3 where d represents the thickness of the liquid crystal layer in the unit of micrometers and R represents the characteristic length of the liquid crystal phase in the unit of micrometers. |
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DETAILED DESCRIPTION According to one aspect of the invention, a liquid crystal display device includes a pair of substrates; a liquid crystal layer interposed between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer.
The liquid crystal layer includes a polymer dispersed liquid crystal material having a polymer phase and a liquid crystal phase, and fulfills the conditions represented by: 2.
585.
multidot.
d.
sup.
(-1/3) -0.
3<R<2.
585.
multidot.
d.
sup.
(-.
sup.
1/3) +0.
3 where d represents the thickness of the liquid crystal layer in the unit of micrometers and R represents the characteristic length of the liquid crystal phase in the unit of micrometers.
According to another aspect of the invention, a method for producing a liquid crystal display device including the above-described elements includes the step of performing polymerization-induced phase separation of a mixture including a liquid crystal material, a photopolymerizable monomer, and a photopolymerizable oligomer to form the polymer dispersed liquid crystal material.
The polymer dispersed liquid crystal material fulfills the condition represented by: 0.
8.
multidot.
550.
multidot.
d.
sup.
(-3/2) <M/O<1.
2.
multidot.
550.
multidot.
d.
sup.
(-3/2) where d represents the distance between the pair of substrates in the unit of micrometers, M represents the weight ratio of the photopolymerizable monomer in the mixture, and O represents the weight ratio of the photopolymerizable oligomer in the mixture.
According to still another aspect of the invention, a liquid crystal layer included in a liquid crystal display device having the above-described elements fulfills the conditions represented by: R.
multidot.
.
DELTA.
n>0.
3 and 8R<d wherein d represents the thickness of the liquid crystal layer in the unit of micrometers, R represents the characteristic length of the liquid crystal phase in the unit of micrometers, and .
DELTA.
n represents the birefringence of a liquid crystal material forming the liquid crystal phase
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