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US5386306A
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Active matrix liquid crystal display element and projection type active matrix liquid crystal display device
Assignee: AGC Inc
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Filing: 1992-05-22
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Granted: 1995-01-31
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Expires: 2012-05-22
Abstract
Abstract An active matrix liquid crystal display element and a projection type active matrix liquid crystal display device by which a display can be obtained which is good in color balance and high in brightness and also in contrast ratio. The display element includes a liquid crystal material held between an active matrix substrate and a counter electrode substrate. The liquid crystal material is formed from a liquid crystal polymer composite wherein nematic liquid crystal is contained dispersively in a polymer matrix having a refractive index which coincides with the ordinary refractive index of the liquid crystal used, and a silicon thin film transistor is used as an active element on the active matrix substrate. The display device includes such an active matrix liquid crystal display element, a light source for projection light, and an optical system of projection.
Inventors
- 👤 Tomoki Gunjima
- 👤 Masanori Yuki
- 👤 Masaya Kunigita
- 👤 Yoshinori Hirai
- 👤 Yukio Yoshikawa
- 👤 Eiji Shidoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:15
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3105; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1334; G09; G09F; G09F19/00; G09F19/12; G09F19/18; G02F2202/00; G02F2202/40
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
199 words
An active matrix type liquid crystal display element wherein liquid crystal polymer composite in which a nematic liquid crystal is dispersed and held in a polymer matrix having a refractive index which is substantially equal to an ordinary refractive index (n 0 ) of the liquid crystal is held between a first substrate on which at least a pixel electrode with an active element is provided and a second substrate on which at least a counter electrode is provided, wherein said polymer matrix is made of a light curable type polymer, said liquid crystal polymer composite layer is obtained by irradiating light to the solution in which the liquid crystal and the light curable type polymer are dissolved uniformly to cause the solution to cure, a specific resistance of said liquid crystal polymer composite is higher than 5×10 9 Ωcm, an average particle diameter R(μm) of the liquid crystal dispersively contained in the polymer matrix is substantially uniform and is 1.5 to 2.5 μm, an electrode substrate distance d 0 is substantially 8 to 13 μm, and a maximum root mean square of applied voltage for said liquid crystal polymer composite is lower than or equal to 10 volts.
Claim 2
Dependent Claim
199 words
An active matrix type liquid crystal display element wherein liquid crystal polymer composite in which a nematic liquid crystal is dispersed and held in a polymer matrix having a refractive index which is substantially equal to an ordinary refractive index (n 0 ) of the liquid crystal is held between a first substrate on which at least a pixel electrode with an active element is provided and a second substrate on which at least a counter electrode is provided, wherein said polymer matrix is made of a light curable type polymer, said liquid crystal polymer composite layer is obtained by irradiating light to the solution in which the liquid crystal and the light curable type polymer are dissolved uniformly to cause the solution to cure, a specific resistance of said liquid crystal polymer composite is higher than 5×10 9 Ωcm, an average particle diameter R(μm) of the liquid crystal dispersively contained in the polymer matrix is substantially uniform and is 1.5 to 2.5 μm, an electrode substrate distance d 0 is substantially 8 to 13 μm, and a maximum root mean square of applied voltage for said liquid crystal polymer composite is lower than or equal to 10 volts.
Claim 3
Dependent Claim
23 words
An active matrix type liquid crystal display element as set forth in claim 1, wherein said polymer is a light curable vinyl polymer.
Claim 4
Dependent Claim
24 words
An active matrix type liquid crystal display element as set forth in claim 1, wherein the light irradiating for the solution is ultraviolet ray.
Claim 5
Dependent Claim
24 words
An active matrix type liquid crystal display element as set forth in claim 1, wherein said active element is a polysilicon thin film transistor.
Claim 6
Dependent Claim
22 words
An active matrix type liquid crystal display element as set forth in claim 1, wherein said active element is a MIM element.
Claim 7
Dependent Claim
22 words
An active matrix type liquid crystal display element as set forth in claim 1, wherein said active element is a PIN diode.
Claim 8
Dependent Claim
32 words
An active matrix type liquid crystal display element as set forth in claim 1, wherein said electrode is a reflective electrode and used as of the reflection type liquid crystal display element.
Claim 9
Dependent Claim
31 words
An active matrix type liquid crystal display element as set forth in claim 1, further comprising: color filters to combine with the liquid crystal display element to make a color display.
Claim 10
Dependent Claim
208 words
A projection type active matrix type liquid crystal display element comprising: a liquid crystal display element having a liquid crystal polymer composite in which a nematic liquid crystal is dispersed and held in a polymer matrix having a refractive index which is substantially equal to an ordinary refractive index (n 0 ) of the liquid crystal is held between a first substrate on which at least a pixel electrode with an active element is provided and a second substrate on which at least a counter electrode is provided, wherein said polymer matrix is made of a light curable type polymer, said liquid crystal polymer composite layer is obtained by irradiating light to the solution in which the liquid crystal and the light curable type polymer are dissolved uniformly to cause the solution to cure, a specific resistance of said liquid crystal polymer composite is higher than 5×10 9 Ωcm, an average particle diameter R(μm) of the liquid crystal dispersively contained in the polymer matrix is substantially uniform and is 1.5 to 2.5 μm, an electrode substrate distance d 0 is substantially 8 to 13 μm, and a maximum root mean square of applied voltage for said liquid crystal polymer composite is lower than or equal to 10 volts.
Claim 11
Dependent Claim
208 words
A projection type active matrix type liquid crystal display element comprising: a liquid crystal display element having a liquid crystal polymer composite in which a nematic liquid crystal is dispersed and held in a polymer matrix having a refractive index which is substantially equal to an ordinary refractive index (n 0 ) of the liquid crystal is held between a first substrate on which at least a pixel electrode with an active element is provided and a second substrate on which at least a counter electrode is provided, wherein said polymer matrix is made of a light curable type polymer, said liquid crystal polymer composite layer is obtained by irradiating light to the solution in which the liquid crystal and the light curable type polymer are dissolved uniformly to cause the solution to cure, a specific resistance of said liquid crystal polymer composite is higher than 5×10 9 Ωcm, an average particle diameter R(μm) of the liquid crystal dispersively contained in the polymer matrix is substantially uniform and is 1.5 to 2.5 μm, an electrode substrate distance d 0 is substantially 8 to 13 μm, and a maximum root mean square of applied voltage for said liquid crystal polymer composite is lower than or equal to 10 volts.
Claim 12
Dependent Claim
71 words
A projection type active matrix type liquid crystal display device as set forth in claim 9, further comprising: a projection light source for projecting light onto said liquid crystal display element; an optical system of projection for projecting an image from said liquid crystal display element; and a device for reducing diffused light located in the optical system of projection or between the optical system of projection and a projection screen.
Claim 13
Dependent Claim
90 words
A projection type active matrix type liquid crystal display device as set forth in claim 9, further comprising: a projection light source for projecting light onto said liquid crystal display element; an optical system of projection for projecting an image from said liquid crystal display element; and a device for reducing diffused light located in the optical system of projection or between the optical system of projection and a projection screen, wherein said device for reducing diffused light is an aperture or a spot disposed on a passage of light.
Claim 14
Dependent Claim
94 words
A projection type active matrix type liquid crystal display device as set forth in claim 9, further comprising: a projection light source for projecting light onto said liquid crystal display element; an optical system of projection for projecting an image from said liquid crystal display element; and a device for reducing diffused light located in the optical system of projection or between the optical system of projection and a projection screen wherein the device for reducing diffused light is a mirror having a small surface area which is disposed on a passage of light.
Claim 15
Dependent Claim
132 words
A projection type active matrix type liquid crystal display device as set forth in claim 9, further comprising: a projection light source for projecting light onto said liquid crystal display element; an optical system of projection for projecting an image from said liquid crystal display element; and a device for reducing diffused light located in the optical system of projection or between the optical system of projection and a projection screen, the projection screen further comprising: means for separating light from the projection light source into lights of three colors of R, G and B; means for passing the light of three colors through respective active matrix liquid crystal display elements; and means for synthesizing light emitted from the liquid crystal display elements to project them through the optical system of projection.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |