US5517344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for protection of drive circuits formed on a substrate of a liquid crystal display
Assignee: Prime View HK Ltd
•
Filing: 1994-05-20
•
Granted: 1996-05-14
•
Expires: 2014-05-20
Abstract
Abstract Separate circuit sections of active driver circuits located adjacent at least one side of a liquid crystal display have a first encapsulating material covering each of the active driver circuits separately and a second encapsulating material covering all of the active driver circuits and their first encapsulating layer. The active driver circuits may also be sealed between two spaced bands forming an enclosure between the substrates and having an opening in the outer seal to allow a fluid to be inserted in the enclosure formed by the two seal bands to protect the active driver circuits therein. The opening may be sealed with an adhesive.
Inventors
- 👤 Dyi-chung Hu
- 👤 Sywe N. Lee
- 👤 Jessica Lan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:27
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1339; G02F1/1345; G02F1/13454
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
131 words
A system for protection of a liquid crystal display device having a display area and that includes active driver circuits integrally formed on a first substrate, the system including: n separate spaced circuit sections forming the active driver circuits, each of said n spaced circuit sections being formed on the first substrate adjacent at least one side of the display area of the liquid crystal display; a first protective coating material separately covering and encapsulating each of the n circuit sections of said active driver circuits, said first protective coating adhering to the first substrate for protecting the active driver circuits; and a second outer protective coating material continuously covering and encapsulating all of the n circuit sections of said active driver circuits to enhance protection of the active driver circuits.
Claim 2
Independent Claim
131 words
A system for protection of a liquid crystal display device having a display area and that includes active driver circuits integrally formed on a first substrate, the system including: n separate spaced circuit sections forming the active driver circuits, each of said n spaced circuit sections being formed on the first substrate adjacent at least one side of the display area of the liquid crystal display; a first protective coating material separately covering and encapsulating each of the n circuit sections of said active driver circuits, said first protective coating adhering to the first substrate for protecting the active driver circuits; and a second outer protective coating material continuously covering and encapsulating all of the n circuit sections of said active driver circuits to enhance protection of the active driver circuits.
Claim 3
Dependent Claim
51 words
A system as in claim 1 wherein: the first protective coating material is a polymer; and each of said n circuit sections has a length, L, and provides a stress, S, in the substrate where SαΔE×L and ΔE=the difference in the thermal coefficient of expansion of the substrate and the polymer.
Claim 4
Dependent Claim
31 words
A system as in claim 2 wherein the encapsulation polymer is an epoxy type that is dispensed over the active driver circuits according to a tape automated bonding chip encapsulation process.
Claim 5
Dependent Claim
19 words
A system as in claim 2 where in the encapsulation polymer is screen printed over the active driver circuits.
Claim 6
Dependent Claim
11 words
A system as in claim 1 wherein the substrate is glass.
Claim 7
Dependent Claim
43 words
A system as in claim 1 further including: a second substrate separated from the first substrate over at least a portion of one of the substrates; and said active driver circuits being on said first substrate but not covered by the second substrate.
Claim 8
Independent Claim
127 words
A system for protection of an active driver circuit integrally formed on one of first and second spaced substrates having a liquid crystal display area, the system including: at least one elongated active driver circuit formed on the first substrate adjacent the liquid crystal display area; first and second spaced seals between the first and second spaced substrates to form an enclosure substantially surrounding said display area; said first seal surrounding and enclosing said liquid crystal display area in a liquid-tight fashion; and said second seal being spaced from said first seal and forming said enclosure with said first seal to seal the at least one elongated active driver circuit in said enclosure formed between said first and second substrates by said first and second spaced seals.
Claim 9
Independent Claim
127 words
A system for protection of an active driver circuit integrally formed on one of first and second spaced substrates having a liquid crystal display area, the system including: at least one elongated active driver circuit formed on the first substrate adjacent the liquid crystal display area; first and second spaced seals between the first and second spaced substrates to form an enclosure substantially surrounding said display area; said first seal surrounding and enclosing said liquid crystal display area in a liquid-tight fashion; and said second seal being spaced from said first seal and forming said enclosure with said first seal to seal the at least one elongated active driver circuit in said enclosure formed between said first and second substrates by said first and second spaced seals.
Claim 10
Dependent Claim
39 words
A system as in claim 7 further comprising a fluid filling said enclosure in which the at least one elongated active driver circuit is sealed between said first and second spaced substrates and said first and second spaced seals.
Claim 11
Dependent Claim
13 words
A system as in claim 8 wherein the fluid is an inert gas.
Claim 12
Dependent Claim
14 words
A system as in claim 8 wherein the fluid is a low viscous fluid.
Claim 13
Dependent Claim
16 words
A system as in claim 8 wherein the fluid is an opaque fluid to block light.
Claim 14
Dependent Claim
58 words
A system as in claim 8 further including: an opening into one of said seals forming the enclosure sealing the active driving circuit between said first and second substrates for entering said fluid therein; and a glue seal to block said opening after said enclosure has been filled with said fluid to maintain said fluid in said enclosure.
Claim 15
Dependent Claim
13 words
A system as in claim 12 wherein said glue is a UV glue.
Claim 16
Dependent Claim
44 words
A system as in claim 7 further including: an opening extending through both of said first and second spaced seals for inserting liquid crystal into said liquid crystal display area; and a seal for closing said opening after the liquid crystal is placed therein.
References Cited (Backward Citations)
US3882349A
Cited
US4138626A
Cited
US4401537A
Cited
US4394067A
Cited
US4431270A
Cited
US4586789A
Cited
US4629942A
Cited
US4896946A
Cited
US4826297A
Cited
EP0267688A1
Cited
US4810061A
Cited
US4917466A
Cited
US4836651A
Cited
US5179460A
Cited
US5130832A
Cited
JPH03107127A
Cited
US5076667A
Cited
US5148301A
Cited
US5202778A
Cited
US5133036A
Cited
JPH0450819A
Cited
US5233451A
Cited
US5349226A
Cited
US5233452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-05-14 | 1999-11-13 | 2000-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-14 | 2003-11-13 | 2004-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-14 | 2007-11-13 | 2008-05-14 | $7700.00 | Window Closed / Lapsed |