Liquid crystal display element and a projection type liquid crystal display apparatus
First Claim
1. A liquid crystal display device comprising:
- a liquid crystal display element comprising;
(i) a first substrate with a pixel electrode drive by an active element for said pixel electrode;
(ii) a second substrate with a counter electrode; and
(iii) a liquid crystal polymer composite, held between said first substrate and said second substrate comprised of a nematic liquid crystal dispersively contained in a polymer matrix having a refractive index which is substantially equal to the ordinary index (no) of said nematic liquid crystal used,wherein said nematic liquid crystal has an anisotropy of refractive index 0.18≦
Δ
n; and
wherein the anisotropy of relative dielectric constant (Δ
ε
LC) is 5<
Δ
ε
LC <
13.
2 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal display element comprises a pair of substrates provided with electrodes and a liquid crystal and solidified matrix composite material, disposed between the pair of substrates, which includes a nematic liquid crystal dispersed and held in a solidified matrix, the nematic liquid crystal being such that the refractive index of the liquid crystal is changed depending on states of applying a voltage wherein in a state, the refractive index of the liquid crystal substantially coincides with that of the solidified matrix to thereby pass light, and in the other state, the former does not coincide with the latter to thereby cause the scattering of light, wherein the refractive index anisotropy Δn of the liquid crystal used is 0.18 or higher, and the dielectric anisotropy ΔεLC of the liquid crystal used satisfies the relation of 5<ΔεLC <13.
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Citations
38 Claims
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1. A liquid crystal display device comprising:
-
a liquid crystal display element comprising; (i) a first substrate with a pixel electrode drive by an active element for said pixel electrode; (ii) a second substrate with a counter electrode; and (iii) a liquid crystal polymer composite, held between said first substrate and said second substrate comprised of a nematic liquid crystal dispersively contained in a polymer matrix having a refractive index which is substantially equal to the ordinary index (no) of said nematic liquid crystal used, wherein said nematic liquid crystal has an anisotropy of refractive index 0.18≦
Δ
n; andwherein the anisotropy of relative dielectric constant (Δ
ε
LC) is 5<
Δ
ε
LC <
13. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A liquid crystal display element comprising:
-
(i) a first substrate with a first electrode; (ii) a second substrate with a second electrode; and (iii) a liquid crystal polymer composite, held between said first substrate and said second substrate comprised of a nematic liquid crystal dispersively contained in a polymer matrix having a refractive index which is substantially equal to the ordinary index (no) of said nematic liquid crystal used, wherein said nematic liquid crystal has an anisotropy of refractive index 0.18≦
Δ
n;the average particle diameter R(μ
m) of the liquid crystal dispersively contained in said polymer matrix satisfies the relationship
space="preserve" listing-type="equation">0.3<
R·
Δ
n<
0.7 (1B); andthe distance d (μ
m) between said first electrode and said second electrode satisfies the relationship
space="preserve" listing-type="equation">4R<
d<
8R (2B). - View Dependent Claims (13, 14, 15, 16, 17)
-
-
18. An active matrix type liquid crystal display element comprising:
-
(i) a first substrate with a pixel electrode drive by an active element for said pixel electrode; (ii) a second substrate with a counter electrode; and (iii) a liquid crystal polymer composite, held between said first substrate and said second substrate comprised of a nematic liquid crystal dispersively contained in a polymer matrix having a refractive index which is substantially equal to the ordinary index (no) of said nematic liquid crystal used, wherein a specific resistance of said liquid crystal polymer composite is >
5×
109 Ω
·
cm;the average particle diameter R(μ
m) of the liquid crystal dispersively contained in said polymer matrix is substantially uniform and 1.5 to 2.5 μ
m;the distance d (μ
m) between said first electrode and said second electrode is 8 to 13 μ
m; andthe maximum root mean square of applied voltage for said liquid crystal polymer composite is ≦
10 volts. - View Dependent Claims (19, 20, 21)
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22. A projection liquid crystal display apparatus comprising a light source,
an optical system of projection; - and a liquid crystal display device comprising an active matrix liquid crystal element wherein a liquid crystal/polymer composite is held between an active matrix substrate on which an active element is provided for each pixel electrode and a counter electrode substrate on which a counter electrode is provided, said liquid crystal/polymer composite comprising a liquid crystal material having a positive dielectric constant and an anisotropy of refractive index An which is greater than or equal to 0.18, and having a volume fraction which is greater than or equal to 62% and less than 70%, the polymer matrix of the liquid crystal/polymer composite comprising polymerized units of acrylate and acrylic oligomer, and having pores formed therein; and
whereinthe specific resistance of said liquid crystal/polymer composite is higher than 5×
108 Ω
cm;the haze value of said liquid crystal/polymer composite is higher than 80% in a scattering condition and the transmittance is higher than 70%, and wherein the contrast ratio of said display is greater than 100. - View Dependent Claims (23, 24)
- and a liquid crystal display device comprising an active matrix liquid crystal element wherein a liquid crystal/polymer composite is held between an active matrix substrate on which an active element is provided for each pixel electrode and a counter electrode substrate on which a counter electrode is provided, said liquid crystal/polymer composite comprising a liquid crystal material having a positive dielectric constant and an anisotropy of refractive index An which is greater than or equal to 0.18, and having a volume fraction which is greater than or equal to 62% and less than 70%, the polymer matrix of the liquid crystal/polymer composite comprising polymerized units of acrylate and acrylic oligomer, and having pores formed therein; and
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25. A composition comprising a liquid crystal and a photocurable acrylate monomer, said composition being useful for preparing a liquid crystal/polymer composite capable of exhibiting transparent and light scattering states, wherein Δ
- n and Δ
ε
of said liquid crystal satisfy the following relationships;Δ
n≧
0.18;5<
Δ
ε
<
13. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
- n and Δ
-
33. A liquid crystal optical element comprising:
-
a pair of substrates provides with electrodes, and a liquid crystal and solidified matrix composite material, disposed between the pair of substrates, said composite material being capable of exhibiting transparent and scattering states, wherein Δ
n and Δ
ε
of said liquid crystal satisfy the following relationships;Δ
n≧
0.18;5<
Δ
ε
<
13. - View Dependent Claims (34, 35, 36, 37, 38)
-
Specification