US4589733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Displays and subassemblies having improved pixel electrodes
Assignee: Energy Conversion Devices Inc
•
Filing: 1984-06-29
•
Granted: 1986-05-20
•
Expires: 2004-06-29
Abstract
Abstract Light influencing subassemblies and displays each having a structure in which all of the pixel electronic circuitry, including isolation devices where utilized, are located at one electrode side of each pixel electrode combination. The structure includes the subdivision of one pixel electrode into at least two spaced apart side-by-side electrode segments opposite a common electrode. The displays include light influencing material disposed between the segmented and common electrodes. The electrode segments further can include at least one isolation device coupled to at least one of the segments which facilitates selective excitation of the pixel elements and applied potential reversal across the electrodes during alternate display frames. The displays have an increased manufacturing yield, reduced capacitance and increased isolation. Also disclosed is a method of making the subassemblies and displays.
Inventors
- 👤 Zvi Yaniv
- 👤 Yair Bar-on
- 👤 Vincent D. Cannella
- 👤 Gregory L. Hansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:54
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/13624; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G02F1/134345; G02F1/1365
Claims Analysis
Total Claims: 58
Claim 1
Independent Claim
65 words
In a display, a pixel comprising: a first electrode including at least two spaced apart electrode portions; a second electrode spaced from and facing said first electrode portions in substantially parallel relation thereto, said second electrode also being electrically insulated from all external circuit connections and from all other pixel electrodes; and light influencing display material between said first electrode portions and said second electrode.
Claim 2
Dependent Claim
65 words
In a display, a pixel comprising: a first electrode including at least two spaced apart electrode portions; a second electrode spaced from and facing said first electrode portions in substantially parallel relation thereto, said second electrode also being electrically insulated from all external circuit connections and from all other pixel electrodes; and light influencing display material between said first electrode portions and said second electrode.
Claim 3
Dependent Claim
34 words
The display as defined in claim 1 wherein the active surface area of said second electrode is substantially coextensive with at least substantially all of the active surface areas of said first electrode portions.
Claim 4
Dependent Claim
24 words
The display as defined in claim 1 further including at least one isolation device coupled to at least one of said first electrode portions.
Claim 5
Dependent Claim
21 words
The display as defined in claim 3 including at least one isolation device coupled to each of said first electrode portions.
Claim 6
Dependent Claim
17 words
The display as defined in claim 3 wherein said isolation device is a dual polarity isolation device.
Claim 7
Dependent Claim
16 words
The display as defined in claim 3 wherein said isolation device is a thin film transistor.
Claim 8
Dependent Claim
16 words
The display as defined in claim 3 wherein said isolation device is a diode ring device.
Claim 9
Dependent Claim
15 words
The display as defined in claim 3 wherein said isolation device is a threshold switch.
Claim 10
Dependent Claim
16 words
The display as defined in claim 3 wherein said isolation device is a two terminal device.
Claim 11
Dependent Claim
16 words
The display as defined in claim 3 wherein said isolation device is a three terminal device.
Claim 12
Dependent Claim
26 words
The display as defined in claim 1 further including at least a pair of isolation devices coupled to at least one of said first electrode portions.
Claim 13
Dependent Claim
21 words
The display as defined in claim 11 including a pair of isolation devices coupled to each of said first electrode portions.
Claim 14
Dependent Claim
16 words
The display as defined in claim 11 wherein said isolation devices are single polarity isolation devices.
Claim 15
Dependent Claim
15 words
The display as defined in claim 11 wherein said isolation devices are two terminal devices.
Claim 16
Dependent Claim
15 words
The display as defined in claim 11 wherein said isolation deices are three terminal devices.
Claim 17
Dependent Claim
13 words
The display as defined in claim 11 wherein said isolation devices are diodes.
Claim 18
Dependent Claim
17 words
The display as defined in claim 16 wherein said isolation diodes are formed from deposited semiconductor material.
Claim 19
Dependent Claim
17 words
The display as defined in claim 16 wherein said deposited semiconductor material is an amorphous semiconductor alloy.
Claim 20
Dependent Claim
14 words
The display as defined in claim 18 wherein said amorphous semiconductor alloy includes silicon.
Claim 21
Dependent Claim
14 words
The display as defined in claim 19 wherein said amorphous silicon alloy includes hydrogen.
Claim 22
Dependent Claim
14 words
The display as defined in claim 19 wherein said amorphous silicon alloy includes fluorine.
Claim 23
Dependent Claim
47 words
The display as defined in claim 17 wherein said diodes include a first doped semiconductor region, a substantially intrinsic semiconductor region overlying said first doped region, and a second doped semiconductor region overlying said intrinsic region, said first and second doped semiconductor regions being opposite in conductivity.
Claim 24
Dependent Claim
21 words
The display as defined in claim 22 wherein said substantially intrinsic semiconductor region is slightly doped with one of said conductivities.
Claim 25
Dependent Claim
22 words
The display as defined in claim 1 further including means for selectively applying operating potentials to each of said first electrode portions.
Claim 26
Dependent Claim
36 words
The display as defined in claim 24 wherein said applying means include means for capacitively coupling said operating potential from one first electrode portion, through said second electrode and to the other said first electrode portion.
Claim 27
Dependent Claim
32 words
The display as defined in claim 1 further including at least a pair of pixel address lines, each of said address lines coupled to a respective one of said first electrode portions.
Claim 28
Dependent Claim
17 words
The display as defined in claim 1 wherein said light influencing material is liquid crystal display material.
Claim 29
Dependent Claim
16 words
The display as defined in claim 27 wherein said liquid crystal display material is nematic material.
Claim 30
Dependent Claim
16 words
A display as defined in claim 1 wherein said first electrode includes only two electrode portions.
Claim 31
Independent Claim
97 words
A method of making a light influencing display including at least one pixel, comprising: providing a substrate; forming a first electrode including at least two spaced apart electrode portions on said substrate; forming at least one address line for each of said electrode portions; forming a second electrode spaced from and facing said first electrode in substantially parallel relation thereto said second electrode being formed so as to be electrically insulated from all external circuit connections and from all other pixel electrodes; and applying a light influencing display material between said first electrode and said second electrode.
Claim 32
Independent Claim
97 words
A method of making a light influencing display including at least one pixel, comprising: providing a substrate; forming a first electrode including at least two spaced apart electrode portions on said substrate; forming at least one address line for each of said electrode portions; forming a second electrode spaced from and facing said first electrode in substantially parallel relation thereto said second electrode being formed so as to be electrically insulated from all external circuit connections and from all other pixel electrodes; and applying a light influencing display material between said first electrode and said second electrode.
Claim 33
Dependent Claim
33 words
The method as defined in claim 30 including forming the active area of said second electrode to be coextensive with at least substantially all of the active surface areas of said first electrode.
Claim 34
Dependent Claim
29 words
The method as defined in claim 31 including forming at least one isolation device coupling at least one of said address lines to one of said first electrode portions.
Claim 35
Dependent Claim
27 words
The method as defined in claim 32 including forming at least one isolation device coupling one of said address lines to each of said first electrode portions.
Claim 36
Dependent Claim
18 words
The method as defined in claim 32 including forming said isolation device as a dual polarity isolation device.
Claim 37
Dependent Claim
17 words
The method as defined in claim 32 including forming said isolation device as a thin film transistor.
Claim 38
Dependent Claim
17 words
The method as defined in claim 32 including forming said isolation device as a diode ring device.
Claim 39
Dependent Claim
16 words
The method as defined in claim 32 including forming said isoltation device as a threshold switch.
Claim 40
Dependent Claim
17 words
The method as defined in claim 32 including forming said isolation device as a two terminal device.
Claim 41
Dependent Claim
17 words
The method as defined in claim 32 including forming said isolation device as a three terminal device.
Claim 42
Dependent Claim
31 words
The method as deined in claim 30 including forming at least a pair of isolation devices coupling at least one of said address lines to one of said first electrode portions.
Claim 43
Dependent Claim
27 words
The method as defined in claim 40 including forming a pair of isolation devices coupling each of said address lines to one of said first electrode portions.
Claim 44
Dependent Claim
16 words
The method as defined in claim 40 including forming said isolation devices as single polarity devices.
Claim 45
Dependent Claim
16 words
The method as defined in claim 40 including forming said isolation devices as two terminal devices.
Claim 46
Dependent Claim
16 words
The method as defined in claim 40 including forming said isolation devices as three terminal devices.
Claim 47
Dependent Claim
14 words
The method as defined in claim 40 including forming said isolation devices as diodes.
Claim 48
Dependent Claim
16 words
The method as defined in claim 45 including forming said isolation diodes from deposited semiconductor material.
Claim 49
Dependent Claim
18 words
The method as defined in claim 46 including forming said deposited semiconductor material from an amorphous semiconductor alloy.
Claim 50
Dependent Claim
16 words
The method as defined in claim 47 including forming said amorphous semiconductor alloy to include silicon.
Claim 51
Dependent Claim
16 words
The method as defined in claim 48 including forming said amorphous silicon alloy to include hydrogen.
Claim 52
Dependent Claim
16 words
The method as defined in claim 48 including forming said amorphous silicon alloy to include fluorine.
Claim 53
Dependent Claim
51 words
The method as defined in claim 46 including forming said diodes by depositing a first doped semiconductor region, depositing a substantially intrinsic semiconductor region over said first doped region, and depositing a second doped semiconductor region over said intrinsic region, said first and second doped semiconductor regions being opposite in conductivity.
Claim 54
Dependent Claim
19 words
The method as defined in claim 51 including slightly doping said substantially intrinsic region with one of said conductivities.
Claim 55
Dependent Claim
22 words
The method as defined in claim 30 including forming means for selectively applying operating potentials to each of said first electrode portions.
Claim 56
Dependent Claim
18 words
The method as defined in claim 30 including forming said light influencing material from liquid crystal display material.
Claim 57
Dependent Claim
17 words
The method as defined in claim 54 including forming said liquid crystal display material from nematic material.
Claim 58
Dependent Claim
21 words
A method as defined in claim 30 wherein said step of forming said first electrode includes forming only two electrode portions.
References Cited (Backward Citations)
US3073992A
Cited
US3603984A
Cited
US3654606A
Cited
US3630015A
Cited
US3883227A
Cited
US4008564A
Cited
US3834794A
Cited
US4226898A
Cited
US4170772A
Cited
US4163677A
Cited
US4223308A
Cited
US4537471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |