EP0166225A2
Expired / Lapsed
EP
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High yield liquid crystal display and method of making same
Assignee: OIS Optical Imaging Systems Inc
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Filing: 1985-05-24
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Granted: —
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Expires: 2005-05-24
Abstract
Abstract A quickly testable subassembly with redundant isolation devices usable in a liquid crystal display has a pair of coplanar spaced apart alectrode segments connected to one or more-isolation devices. Address lines are connected to the isolation devices or the electrodes. The isolation devices and electrical connections to the electrode segments can be quickly tested prior to assembly of a complete display. Redundant isolation devices are formed on the subassembly and inoperative isolation devices can be replaced by associated redundant isolation devices. A method of quickly testing the subassembly and of replacing inoperative isolation devices, and several alternate quickly restable subassembly geometries are also disclosed. A self-selecting redundant geometry and method are also disclosed.
Inventors
- 👤 Zvi Yaniv
- 👤 Vincent D. Cannella
- 👤 Gregory L. Hansell
- 👤 Robert Royce Johnson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:55
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/006; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/13624; G06; G06F; G06F11/00; G06F11/07; G06F11/16; G06F11/20; G09G3/20; G09G3/34; G09G3/36; H; H10; H10W; H10W20/00; H10W20/40; H10W20/49; H10W20/493; H10W20/494; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
78 words
A subassembly (5;190) for use in making a display incorporating a light influencing material, said subassembly being of the type having a surface (10,192) and a first pixel electrode (22,44;100,102;120;140;194,196;270,286;300;316;332;350; 366), means for isolation (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 272;290;302,304;318,336;358), and first (12,14,36,38;104,108;124,126;146;200,202,204,206; 276,292;306,308;322,338;356,372) and second (12,14,36,38;106,110;124,126;143,200,202, 204,206;274,288;306,308;320,334;354,370) means for addressing all formed on said surface, said subassembly being characterized by said first electrode and said means for isolation being connected in electrical series between said first and second means for addressing.
Claim 2
Dependent Claim
78 words
A subassembly (5;190) for use in making a display incorporating a light influencing material, said subassembly being of the type having a surface (10,192) and a first pixel electrode (22,44;100,102;120;140;194,196;270,286;300;316;332;350; 366), means for isolation (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 272;290;302,304;318,336;358), and first (12,14,36,38;104,108;124,126;146;200,202,204,206; 276,292;306,308;322,338;356,372) and second (12,14,36,38;106,110;124,126;143,200,202, 204,206;274,288;306,308;320,334;354,370) means for addressing all formed on said surface, said subassembly being characterized by said first electrode and said means for isolation being connected in electrical series between said first and second means for addressing.
Claim 3
Dependent Claim
46 words
A subassembly (5;190) as defined in Claim 1 further characterized by including redundant means (28,32,116a,118a;134a,136a;150,152;216,218,230,232;360) for isolation arranged to replace said means for isolation (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 358,) said redundant means being in electrical series between said first means for addressing (12,14,36,38;104,108;124,126;146;200,202,204,206;356, 372) and said first electrode (22,44;100,102;120;140;194,196;332;350;366).
Claim 4
Dependent Claim
56 words
A subassembly (5;190) as defined in Claim 2 further characterized by; including a selectably connectable electric connection means (26,34,116b,118b;134b,136b;160,162;240,242,244,246;362; 374,376;380 in Figs. 14B and 14C); and said redundant means for isolation (28,32;116a,118a;134a,136a;150,152;216,218,230, 232;360) and said selectably connectable means being connected in electrical series between said first means for addressing (12,14,36,38;104,108;124,126;146;200,202,204,206;356, 372) and said first electrode (22,44;100,102;120;140;194,196;350;366).
Claim 5
Dependent Claim
30 words
A subassembly (5) as defined in Claim 3 further characterized by said selectably connectable means (26,34,116b,118b;134b,136b;160,162;362;374,376;380) including an anti-fuse selectable from a comparatively non-conducting state to a highly conducting state.
Claim 6
Dependent Claim
22 words
A subassembly (5) as defined in Claim 4 further characterized by said anti-fuse (26,34;116b,118b;134b,136b;374,376;380) including a diode arranged to be short circuited.
Claim 7
Dependent Claim
29 words
A subassembly (5) as defined in Claim 4 further characterized by said anti-fuse (26,34;116b,118b,134b,136b;160,162;362;374,376;380) including a selected material settable from a comparatively non-conducting state to a highly conducting state.
Claim 8
Dependent Claim
33 words
A subassembly (5) as defined in Claim 6 further characterized by said anti-fuse (26,34,116b,118b;134b,136b;160,162;362;374,376;380) including a settable material which may be selectively set to said highly conducting state by means of radiant energy.
Claim 9
Dependent Claim
51 words
A subassembly (5) as defined in Claim 6 further characterized by said anti-fuse (26,34,116b,118b;134b,136b;160,162;362;374,376;380) including a settable material which may be selectively set to said highly conducting state by means of electrical energy applied through the series connection between said first addressing means, (12,14,36,38;104,108;124,126;146;276,292;306,308;322, 338;356,372) and said second addressing means (12,14,36,38;106,110;124,126;143;354,370).
Claim 10
Dependent Claim
74 words
A subassembly as defined in Claim 4 further characterized by said redundant means (28,32,116a,118a;134a,136a;360) and said anti-fuse (26,34;116b,118b;134b,136b;374,376;380 in Fig. 14B and 14C) including at least first and second diodes series coupled in reverse relation, one of which (26,34;116b,118b;134 b ,136b;374,376;380 in Fig. 14B and 14C) functions as at least part of said anti-fuse and one of which (28,32,116a,118a;134a,136a;360) functions as an isolation device when the other is set to said highly conducting state.
Claim 11
Dependent Claim
41 words
A subassembly (5;190) as defined in Claim 2 further characterized by each of said means for isolation (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 272;290;302,304;318,336;358) being arranged to be uncoupled from electrical connection between said first electrode (22,44;100,102;120;140;194,196;270,286;300;316;332;350; 366) and said first means for addressing (12,14,36,38;104,108;124,126;146;200,202,204,206;276, 292;306,308;322,338;356,372).
Claim 12
Dependent Claim
43 words
A subassembly as defined in Claim 10 further characterized by said means for isolation (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 290;358,) being arranged to be uncoupled from electrical connection between said first electrodes (22,44;100,102;120;140;194,196;350;366) and said first means for addressing (12,14,36,38;104,108;124,126;146;200,202,204,206; 356,372) by the application of radiant energy.
Claim 13
Dependent Claim
57 words
A subassembly (5;190) as defined in Claim 1 including a second electrode (22,44;100,102;122;142;194,196;270,286;310;316;332;350; 366) formed on said surface spaced apart from and coplanar to said first electrode (22,44;100,102;120;140;194,196;270,286;300;316;332;350; 366), said first and second electrodes forming electrode segments, and third means for addressing (12,14,36,38;106,110;128;150;200,202,204,206;274,288, 312;320,334,354,370) formed on said surface (10,192) and electrically coupled to said second electrode segment.
Claim 14
Dependent Claim
81 words
A subassembly (5;190) as defined in Claim 12 further characterized by being included in a light influencing display which includes a second surface (52) upon which a common opposing electrode (50) is placed substantially opposite and parallel to both said first (22,44;100,102;120;140;194,196;270,286;300;316;332;350; 366) and second (22,44;100,102;122;142;194,196;270,286;310;316;332;350; 366) electrodes and which includes light influencing material (56) between said first and second electrodes and said opposing electrode so that said common opposing electrode is capacitively coupled to both said first and second electrodes.
Claim 15
Dependent Claim
30 words
A subassembly as defined in Claim 13 further characterized by the absence of addressing means on said second surface (52) for applying electrical current to said common opposing electrode (50).
Claim 16
Dependent Claim
50 words
A subassembly (Figures 12A,12B, and 12C) as defined in Claim 1 further characterized by; said means for isolation (272,290;302,304;318,336) including two isolation devices (282,284,278,280;324,328) electrically connected in parallel between said first means for addressing (276,292;306,308;322,338) and said first electrode (270,286;300;316,332); and both said isolationg devices including a first diode (282,284,278,280;324,328).
Claim 17
Dependent Claim
47 words
A subassembly (Figures 12A and 12B) as defined in Claim 15 further characterized by both said isolation devices (282,284 and 278,280) including a second diode (282 or 284 and 278 or 280) coupled in series relation with said first diode (282 or 284, and 278 or 280).
Claim 18
Dependent Claim
33 words
A subassembly (Figure 12C) as defined in Claim 15 further characterized by both said isolation devices (328,330 and 324,326) including a thin film fuse (326,330) coupled in series relation with said diode (324,328).
Claim 19
Independent Claim
111 words
A method of forming and.testing a subassembly (5;190) for a display including a light influencing material (56), said method being of the type including providing a substrate (10,192), forming a first electrode on the substrate (22,44;100,102;120;140;194,196;270,286;300;316;332;350; 366), forming a selected isolation device (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 272;290;302,304;318,336;358) electrically coupled to the electrode, and forming a first address line (12,14,36,38;104,108;124,126;146;200,202,204,206;276, 292;306,308;322,338;356,372) on said substrate electrically connected to the isolation device, said method being characterized by: forming a second address line (12,14,36,38;106,110;124,126;143,200,202,204,206;274, 288;306,308;320,334;354,370) on said substrate electrically connected to the electrode; and applying selected electric potentials between the first and second address lines to test the electrical connectivity therebetween and the operation of the isolation device.
Claim 20
Independent Claim
111 words
A method of forming and.testing a subassembly (5;190) for a display including a light influencing material (56), said method being of the type including providing a substrate (10,192), forming a first electrode on the substrate (22,44;100,102;120;140;194,196;270,286;300;316;332;350; 366), forming a selected isolation device (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 272;290;302,304;318,336;358) electrically coupled to the electrode, and forming a first address line (12,14,36,38;104,108;124,126;146;200,202,204,206;276, 292;306,308;322,338;356,372) on said substrate electrically connected to the isolation device, said method being characterized by: forming a second address line (12,14,36,38;106,110;124,126;143,200,202,204,206;274, 288;306,308;320,334;354,370) on said substrate electrically connected to the electrode; and applying selected electric potentials between the first and second address lines to test the electrical connectivity therebetween and the operation of the isolation device.
Claim 21
Dependent Claim
59 words
A method as defined in Claim 18 further characterized by forming a redundant isolation device (28,32,116a,118a;134a,136a;150,152;216,218,230,232;360) positioned to be selectively electrically connected between said first electrode (22,44;100,102;120;140;194,196;350;366) and said first address line (12,14,36,38;104,108;124,126;146;200,202,204,206; 356, 372), and then, after applying said selected electric potentials, replacing any tested and inoperative selected isolation device (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 358,368;352;358) with the associated redundant isolation device.
Claim 22
Dependent Claim
39 words
A method as defined in Claim 19 further characterized by said replacing including uncoupling any inoperative isolation device (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 358) and coupling the redundant isolation device (28,32,116a,118a;134a,136a;150,152;216,218,230,232;360) between the first address line (12,14,36,38;104,108;124,126;146;200,202,204,206; 356,372) and the first electrode (22,44;100,102;120;140;194,196;350;366).
Claim 23
Dependent Claim
28 words
A method as defined in Claim 20 further characterized by said uncoupling including applying radiant energy to selectively remove a connection to the inoperative isolation device (18,20,40,42;112,114;130,132;150,152;208,210,220,224; 358).
Claim 24
Dependent Claim
35 words
A method as defined in Claim 20 further characterized by said forming of the redundant isolation device (28,32,116a,118a;134a,136a;150,152;216,218,230,232;360) including forming a selectably connectable electric connection means (26,34,116b,118b;134b,136b;160,162;240,242,244,246;362; 374,376;380) series coupled to the redundant isolation device.
Claim 25
Dependent Claim
39 words
A method as defined in Claim 22 further characterized by said coupling of the redundant isolation device (28,32,116a,118a;134a,136a;150,152;216,218,230,232;360) including providing electrical energy to convert the selectably connectable means (26,34,116b,118b;134b,136b;160,162;240,242,244,246;362; 374,376;380) from a low conductivity to a high conductivity state.
Claim 26
Dependent Claim
39 words
A method as defined in Claim 22 further characterized by said coupling of the redundant isolation device (28,32,116a,118a;134a,136a;150,152;216,218,230,232;360) including providing radiant energy to convert the selectably connectable means (26,34,116b,118b;134b,136b;160,162;240,242,244,246;362; 374,376;380) from a low conductivity to a high conductivity state.
Claim 27
Dependent Claim
48 words
A method as defined in Claim 22 further characterized by said coupling of the redundant isolation device (216,218,230,232) including using photolithographic processes to form a conducting link (240,242,244,246) which electrically connects the selectably connectable means (194 and 216, 194 and 218, 196 and 230, and 199 and 232).
References Cited (Backward Citations)
No citation records indexed.
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