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US4728309A
Expired / Lapsed
US
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Method for the manufacture of a display device, particularly a liquid crystal display
Assignee: Mannesmann VDO AG
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Filing: 1986-09-05
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Granted: 1988-03-01
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Expires: 2006-09-05
Abstract
Abstract A display device, particularly a liquid crystal display, has spacing elements (10) arranged uniformly distributed between two parallel support plates (1, 2). These spacing elements (2) bear a layer of adhesive (11) and are bonded to both support plates (1, 2), precisely in the same way as in the spacing frame (4) is. In this way, the support plates (1, 2) do not bulge toward the outside. In the manufacture of the display device, the spacing frame (4) is first applied onto a support plate (2) followed then by the spacing elements (10). After the second spacing plate (1) has been placed on top, the parts are bonded together under pressure and temperature.
Inventors
- 👤 Holm Baeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:19
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/13392
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A method for producing of a display device, particularly a liquid crystal display, including two support plates which are parallel to each other, and a medium which can be switched between two optically different states enclosed between the two plates, and wherein the support plates are spaced apart by an outer spacing frame; the method comprising the steps of forming spacers of such a size and nature that they are invisible to the eye, providing the spacers between the support plates, uniformly distributing the spacers in the viewing field between the support plates, bonding the plates to each other by a plurality of the spacers between the support plates, the method including the steps of coating the spacers with two components of a two-component adhesive, and separating components of the adhesive from each other by a barrier layer.
Claim 2
Independent Claim
138 words
A method for producing of a display device, particularly a liquid crystal display, including two support plates which are parallel to each other, and a medium which can be switched between two optically different states enclosed between the two plates, and wherein the support plates are spaced apart by an outer spacing frame; the method comprising the steps of forming spacers of such a size and nature that they are invisible to the eye, providing the spacers between the support plates, uniformly distributing the spacers in the viewing field between the support plates, bonding the plates to each other by a plurality of the spacers between the support plates, the method including the steps of coating the spacers with two components of a two-component adhesive, and separating components of the adhesive from each other by a barrier layer.
Claim 3
Dependent Claim
42 words
The method according to claim 1, wherein the spacers are solid bodies, and wherein the steps of coating the spacers with the adhesive and separating the components by the barrier layer are done before the spacers are introduced between the support plates.
Claim 4
Dependent Claim
42 words
The method according to claim 1, wherein said step of forming includes constructing the spacers of glass fibers and after a drawing of the fibers, immersing the fibers in an adhesive preparation and then drying and cutting the fibers to correct length.
Claim 5
Dependent Claim
24 words
The method according to claim 3, wherein said step of drying is accomplished by subjecting the spacers to eddies in a stream of air.
Claim 6
Dependent Claim
34 words
The method according to claim 1, further comprising the step of introducing the spacers in the form of balls or lengths of glass fiber into an adhesive solution and then separating them by spraying.
Claim 7
Independent Claim
155 words
A method for producing of a display device, particularly a liquid crystal display, including two support plates which are parallel to each other, and a medium which can be switched between two optically different states enclosed between the two plates, and wherein the support plates are spaced apart by an outer spacing frame; the method comprising the steps of forming spacers of such a size and nature that they are invisible to the eye, providing the spacers between the support plates, uniformly distributing the spacers in the viewing field between the support plates, bonding the plates to each other by a plurality of the spacers between the support plates, the method further comprising the steps of coating the spacers with an adhesive layer before they are introduced between the support plates, and encapsulating the adhesive layer on its outer side, the encapsulating layer decomposing under pressure and temperature with the bonding to the support plates.
Claim 8
Independent Claim
155 words
A method for producing of a display device, particularly a liquid crystal display, including two support plates which are parallel to each other, and a medium which can be switched between two optically different states enclosed between the two plates, and wherein the support plates are spaced apart by an outer spacing frame; the method comprising the steps of forming spacers of such a size and nature that they are invisible to the eye, providing the spacers between the support plates, uniformly distributing the spacers in the viewing field between the support plates, bonding the plates to each other by a plurality of the spacers between the support plates, the method further comprising the steps of coating the spacers with an adhesive layer before they are introduced between the support plates, and encapsulating the adhesive layer on its outer side, the encapsulating layer decomposing under pressure and temperature with the bonding to the support plates.
Claim 9
Dependent Claim
14 words
The method according the claim 6, wherein the spacers are formed as solid bodies.
Claim 10
Dependent Claim
42 words
The method according to claim 6, wherein said step of forming includes constructing the spacers of glass fibers and after a drawing of the fibers, immersing the fibers in an adhesive preparation and then drying and cutting the fibers to correct length.
Claim 11
Dependent Claim
34 words
The method according to claim 6, further comprising the step of introducing the spacers in the form of balls or lengths of glass fiber into an adhesive solution and then separating them by spraying.
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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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |