US4983429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing cells for liquid crystal display devices
Assignee: Fujifilm Corp
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Filing: 1989-12-06
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Granted: 1991-01-08
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Expires: 2009-12-06
Abstract
Abstract A process for producing a cell for liquid crystal display device is disclosed which comprises the steps of providing an adhesive which contains spherical or rod-like spacers on at least one of display areas of two transparent substrates having provided on each of the surfaces thereof a transparent electrode and an alignment layer, in a dot-like or stripe-like pattern by letterpress printing, and bonding the substrate thus printed to another transparent substrate facing each other.
Inventors
- 👤 Takashi Takayanagi
- 👤 Hideo Kawaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13394; C; C09; C09K; C09K2323/00; C09K2323/05; C09K2323/055; G02F1/13392; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
A process for producing a cell for a ferroelectric liquid crystal display device, which comprises the steps of providing, in sequence, at least a first substrate, an electrode, an alignment layer, a layer having a display cell for containing a liquid crystal, a second alignment layer, a second electrode, and a second substrate, and further comprising the steps of printing an epoxy adhesive or ultra-violet-curing adhesive which contains spherical or rod form spacers having a mean diameter of 1 to 4 μm in the sphere or cross section of the rod on at least one face of said alignment layers in a dot pattern with a diameter of 60 μm or less, or a stripe pattern with a width of 60 μm or less, by letterpress printing with a letterpress printing element having a convex section in a trapezoid form, a trapezoid having a concave on the top or a triangle form, and bonding the substrate thus printed to the other transparent substrate facing the printed substrate.
Claim 2
Dependent Claim
167 words
A process for producing a cell for a ferroelectric liquid crystal display device, which comprises the steps of providing, in sequence, at least a first substrate, an electrode, an alignment layer, a layer having a display cell for containing a liquid crystal, a second alignment layer, a second electrode, and a second substrate, and further comprising the steps of printing an epoxy adhesive or ultra-violet-curing adhesive which contains spherical or rod form spacers having a mean diameter of 1 to 4 μm in the sphere or cross section of the rod on at least one face of said alignment layers in a dot pattern with a diameter of 60 μm or less, or a stripe pattern with a width of 60 μm or less, by letterpress printing with a letterpress printing element having a convex section in a trapezoid form, a trapezoid having a concave on the top or a triangle form, and bonding the substrate thus printed to the other transparent substrate facing the printed substrate.
Claim 3
Dependent Claim
28 words
A process as in claim 1, wherein the spacer is in a rod form and the length to diameter ratio range of the rods is 5:1 to 40:1.
Claim 4
Dependent Claim
102 words
A liquid crystal device comprising, in sequence, at least a first substrate, an electrode, an alignment layer, a layer having a display cell containing a liquid crystal, a second alignment layer, a second electrode, and a second substrate, wherein said display cell additionally contains an adhesive on display area in a dot pattern with a diameter of 60 μm or less, or a stripe pattern with a width of 60 μm or less, said adhesive material contains spacers, and said spacers are spherical or rod form and have a substantially uniform diameter of 1 to 4 μm through the circular cross section.
Claim 5
Dependent Claim
102 words
A liquid crystal device comprising, in sequence, at least a first substrate, an electrode, an alignment layer, a layer having a display cell containing a liquid crystal, a second alignment layer, a second electrode, and a second substrate, wherein said display cell additionally contains an adhesive on display area in a dot pattern with a diameter of 60 μm or less, or a stripe pattern with a width of 60 μm or less, said adhesive material contains spacers, and said spacers are spherical or rod form and have a substantially uniform diameter of 1 to 4 μm through the circular cross section.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |