Patent US5019002A successfully refreshed from Google Patents.
US5019002A
Expired / Lapsed
US
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Method of manufacturing flat panel backplanes including electrostatic discharge prevention and displays made thereby
Assignee: LG Display Co Ltd
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Filing: 1989-07-12
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Granted: 1991-05-28
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Expires: 2009-07-12
Abstract
Abstract Flat panel displays are provided including protection from electrostatic discharge (ESD) during manufacture and thereafter. At least one ESD guard ring is provided to protect the active elements of the display from the potential discharge between the row and column lines. An internal ESD guard ring is coupled to the row and column lines via shunt transistors. An external ESD guard ring is coupled to the row and column lines via a resistance. Both of the guard rings can be provided; however, the external guard ring is removed prior to completion of the display.
Inventors
- 👤 Scott H. Holmberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:20
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136204; Y; Y10; Y10S; Y10S345/00; Y10S345/904
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
110 words
A method of manufacturing active matrix display backplanes and displays therefrom, comprising: providing a substrate; forming a pattern of pixels on said substrate; forming a plurality of row and column intersecting pixel activation lines, interconnecting substantially all of said row lines to one another and substantially all of said column lines to one another; forming an outer electrostatic discharge guard ring on said substrate coupled to said interconnected row and column lines via a resistance to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays; and removing said outer guard ring and row and column interconnections prior to completion of the display.
Claim 2
Independent Claim
110 words
A method of manufacturing active matrix display backplanes and displays therefrom, comprising: providing a substrate; forming a pattern of pixels on said substrate; forming a plurality of row and column intersecting pixel activation lines, interconnecting substantially all of said row lines to one another and substantially all of said column lines to one another; forming an outer electrostatic discharge guard ring on said substrate coupled to said interconnected row and column lines via a resistance to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays; and removing said outer guard ring and row and column interconnections prior to completion of the display.
Claim 3
Dependent Claim
26 words
The method as defined in claim 1 including coupling one plurality of said interconnected row and column lines to said outer guard ring via said resistance.
Claim 4
Dependent Claim
23 words
The method as defined in claim 2 including forming at least one pickup pad coupled to said resistance via a shunt switching element.
Claim 5
Dependent Claim
28 words
The method as defined in claim 3 including coupling said pickup pad to the other plurality of said interconnected row and column lines via another shunt switching element.
Claim 6
Dependent Claim
25 words
The method as defined in claim 3 including forming a corner on said pad to align the front plane and back plane of the display.
Claim 7
Dependent Claim
23 words
The method as defined in claim 3 including forming a plurality of pickup pads, each one on a separate corner of the display.
Claim 8
Dependent Claim
39 words
The method as defined in claim 1 including forming a corner pad on at least one corner of the display and aligning scribe lines with said corner pad for removing said outer guard ring and row and column intersections.
Claim 9
Dependent Claim
49 words
The method as defined in claim 1 including forming an inner electrostatic discharge guard ring on said substrate coupled to said row and column lines via shunt switching elements to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays and thereafter.
Claim 10
Dependent Claim
24 words
The method as defined in claim 8 including forming separate shunt switching elements between said inner guard ring and each row and column line.
Claim 11
Independent Claim
76 words
A method of manufacturing active matrix display backplanes and displays therefrom, comprising: providing a substrate; forming a pattern of pixels on said substrate; forming a plurality of row and column intersecting pixel activation lines; and forming an inner electrostatic discharge guard ring on said substrate coupled to said row and column lines via shunt switching elements to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays and thereafter.
Claim 12
Independent Claim
76 words
A method of manufacturing active matrix display backplanes and displays therefrom, comprising: providing a substrate; forming a pattern of pixels on said substrate; forming a plurality of row and column intersecting pixel activation lines; and forming an inner electrostatic discharge guard ring on said substrate coupled to said row and column lines via shunt switching elements to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays and thereafter.
Claim 13
Dependent Claim
24 words
The method as defined in claim 10 including forming separate shunt switching elements between said inner guard ring and each row and column line.
Claim 14
Dependent Claim
85 words
The method as defined in claim 10 including interconnecting substantially all of said row lines to one another and substantially all of said column lines to one another and forming an outer electrostatic discharge guard ring on said substrate coupled to said interconnected row and column lines via a resistance to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays; and removing said outer guard ring and row and column interconnections prior to completion of the display.
Claim 15
Dependent Claim
26 words
The method as defined in claim 12 including coupling one plurality of said interconnected row and column lines to said outer guard ring via said resistance.
Claim 16
Dependent Claim
23 words
The method as defined in claim 13 including forming at least one pickup pad coupled to said resistance via a shunt switching element.
Claim 17
Dependent Claim
28 words
The method as defined in claim 14 including coupling said pickup pad to the other plurality of said interconnected row and column lines via another shunt switching element.
Claim 18
Dependent Claim
25 words
The method as defined in claim 14 including forming a corner on said pad to align the front plane and back plane of the display.
Claim 19
Dependent Claim
23 words
The method as defined in claim 10 including forming a plurality of pickup pads, each one on a separate corner of the display.
Claim 20
Dependent Claim
39 words
The method as defined in claim 10 including forming a corner pad on at least one corner of the display and aligning scribe lines with said corner pad for removing said outer guard ring and row and column intersections.
Claim 21
Dependent Claim
88 words
An active matrix display backplane, comprising: a substrate; a pattern of pixels formed on said substrate; a plurality of row and column intersecting pixel activation lines, substantially all of said row lines interconnected to one another and substantially all of said column lines interconnected to one another; and an outer removable electrostatic discharge guard ring formed on said substrate coupled to said interconnected row and column lines via a resistance to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays.
Claim 22
Dependent Claim
88 words
An active matrix display backplane, comprising: a substrate; a pattern of pixels formed on said substrate; a plurality of row and column intersecting pixel activation lines, substantially all of said row lines interconnected to one another and substantially all of said column lines interconnected to one another; and an outer removable electrostatic discharge guard ring formed on said substrate coupled to said interconnected row and column lines via a resistance to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays.
Claim 23
Dependent Claim
26 words
The backplane as defined in claim 19 including one plurality of said interconnected row and column lines coupled to said outer guard ring via said resistance.
Claim 24
Dependent Claim
22 words
The backplane as defined in claim 20 including at least one pickup pad coupled to said resistance via a shunt switching element.
Claim 25
Dependent Claim
28 words
The backplane as defined in claim 21 including said pickup pad coupled to the other plurality of said interconnected row and column lines via another shunt switching element.
Claim 26
Dependent Claim
25 words
The backplane as defined in claim 21 including a corner formed on said pad to align the front plane and back plane of the display.
Claim 27
Dependent Claim
23 words
The backplane as defined in claim 21 including a plurality of pickup pads, each one formed on a separate corner of the display.
Claim 28
Dependent Claim
40 words
The backplane as defined in claim 19 including a corner pad formed on at least one corner of the display and having scribe lines aligned with said corner pad for removing said outer guard ring and row and column intersections.
Claim 29
Dependent Claim
49 words
The backplane as defined in claim 19 including an inner electrostatic discharge guard ring formed on said substrate coupled to said row and column lines via shunt switching elements to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays and thereafter.
Claim 30
Dependent Claim
24 words
The backplane as defined in claim 26 including separate shunt switching elements formed between said inner guard ring and each row and column line.
Claim 31
Dependent Claim
68 words
An active matrix display backplane, comprising: a substrate; a pattern of pixels formed on said substrate; a plurality of row and column intersecting pixel activation lines; and an inner electrostatic discharge guard ring formed on said substrate coupled to said row and column lines via shunt switching elements to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays and thereafter.
Claim 32
Dependent Claim
68 words
An active matrix display backplane, comprising: a substrate; a pattern of pixels formed on said substrate; a plurality of row and column intersecting pixel activation lines; and an inner electrostatic discharge guard ring formed on said substrate coupled to said row and column lines via shunt switching elements to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays and thereafter.
Claim 33
Dependent Claim
24 words
The backplane as defined in claim 28 including separate shunt switching elements formed between said inner guard ring and each row and column line.
Claim 34
Dependent Claim
69 words
The backplane as defined in claim 28 including substantially all of said row lines interconnected to one another and substantially all of said column lines interconnected to one another and an outer electrostatic discharge guard ring formed on said substrate coupled to said interconnected row and column lines via a resistance to provide protection from electrostatic discharges between said row and column activation lines during manufacture of the displays.
Claim 35
Dependent Claim
26 words
The backplane as defined in claim 30 including one plurality of said interconnected row and column lines coupled to said outer guard ring via said resistance.
Claim 36
Dependent Claim
22 words
The backplane as defined in claim 31 including at least one pickup pad coupled to said resistance via a shunt switching element.
Claim 37
Dependent Claim
28 words
The backplane as defined in claim 32 including said pickup pad coupled to the other plurality of said interconnected row and column lines via another shunt switching element.
Claim 38
Dependent Claim
25 words
The backplane as defined in claim 32 including a corner formed on said pad to align the front plane and back plane of the display.
Claim 39
Dependent Claim
23 words
The backplane as defined in claim 28 including a plurality of pickup pads, each one formed on a separate corner of the display.
Claim 40
Dependent Claim
40 words
The backplane as defined in claim 28 including a corner pad formed on at least one corner of the display and having scribe lines aligned with said corner pad for removing said outer guard ring and row and column intersections.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |