Patent US6104041A successfully refreshed from Google Patents.
US6104041A
Expired / Lapsed
US
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Switching circuitry layout for an active matrix electroluminescent display pixel with each pixel provided with the transistors
Assignee: Transpacific Infinity LLC
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Filing: 1998-05-29
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Granted: 2000-08-15
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Expires: 2018-05-29
Abstract
Abstract In an active matrix electroluminescent display, a pixel containing a electroluminescent cell and the switching electronics for the electroluminescent cell where said switching electronics contains two transistors, a low voltage MOS transistor and a high voltage MOS transistor. A low voltage transistor is controlled by signals on a data and a select line. When activated, the low voltage transistor activates the high voltage transistor by charging the gate of the high voltage transistor. The gate charge is stored between the gate electrode of the high voltage transistor and an electric field shield forming a pixel signal capacitor. The pixel signal capacitor is positioned within the layout of the pixel a distance from the drain of the high voltage MOS transistor.
Inventors
- 👤 Fu-Lung Hsueh
- 👤 Alfred Charles Ipri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:54
CPC Classifications
H; H10; H10D; H10D86/00; H10D30/00; H10D30/60; H10D30/67; H10D30/6704; H10D30/6713; H10D30/6715; H10D30/6717; H10D64/00; H10D64/111; H10D64/112
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
71 words
A switching circuit comprising: a first transistor being selectable to activate said electroluminescent display; a storage capacitor, coupled to said first transistor, for storing a pixel signal; and a second transistor, connected between said first transistor and said electroluminescent display for connecting high voltage to said electroluminescent cell in response to said first transistor being activated, where said second transistor containing a drain region that is distant from said storage capacitor.
Claim 2
Dependent Claim
71 words
A switching circuit comprising: a first transistor being selectable to activate said electroluminescent display; a storage capacitor, coupled to said first transistor, for storing a pixel signal; and a second transistor, connected between said first transistor and said electroluminescent display for connecting high voltage to said electroluminescent cell in response to said first transistor being activated, where said second transistor containing a drain region that is distant from said storage capacitor.
Claim 3
Dependent Claim
21 words
The switching circuit of claim 1 wherein said storage capacitor is connected between a gate of said second transistor and ground.
Claim 4
Dependent Claim
18 words
The switching circuit of claim 1 wherein said second transistor has a source that is connected to ground.
Claim 5
Dependent Claim
20 words
The switching circuit of claim 3 further comprising an adjacent second transistor that shares the source of the second transistor.
Claim 6
Dependent Claim
14 words
The switching circuit of claim 1 wherein said second transistor is a DMOS transistor.
Claim 7
Dependent Claim
24 words
The switching circuit of claim 1 wherein said first transistor is positioned between said storage capacitor and said drain region of said second transistor.
Claim 8
Dependent Claim
20 words
The switching circuit of claim 1 wherein the drain region of said second transistor is coupled to an electroluminescent cell.
Claim 9
Dependent Claim
25 words
The switching circuit of claim 1 further comprising another second transistor within an adjacent switching circuit having a common source region with said second transistor.
Claim 10
Dependent Claim
81 words
In an electroluminescent display containing a plurality of pixel elements, each pixel element comprising: a first transistor being selectable to activate said electroluminescent display; a storage capacitor, coupled to said first transistor, for storing a pixel signal; and a second transistor, connected between said first transistor and said electroluminescent display for connecting high voltage to said electroluminescent cell in response to said first transistor being activated, where said second transistor containing a drain region that is distant from said storage capacitor.
Claim 11
Dependent Claim
81 words
In an electroluminescent display containing a plurality of pixel elements, each pixel element comprising: a first transistor being selectable to activate said electroluminescent display; a storage capacitor, coupled to said first transistor, for storing a pixel signal; and a second transistor, connected between said first transistor and said electroluminescent display for connecting high voltage to said electroluminescent cell in response to said first transistor being activated, where said second transistor containing a drain region that is distant from said storage capacitor.
Claim 12
Dependent Claim
20 words
The pixel of claim 9 wherein said storage capacitor is connected between a gate of said second transistor and ground.
Claim 13
Dependent Claim
17 words
The pixel of claim 9 wherein said second transistor has a source that is connected to ground.
Claim 14
Dependent Claim
19 words
The pixel of claim 11 further comprising an adjacent second transistor that shares the source of the second transistor.
Claim 15
Dependent Claim
13 words
The pixel of claim 9 wherein said second transistor is a DMOS transistor.
Claim 16
Dependent Claim
23 words
The pixel of claim 9 wherein said first transistor is positioned between said storage capacitor and said drain region of said second transistor.
Claim 17
Dependent Claim
19 words
The pixel of claim 9 wherein the drain region of said second transistor is coupled to an electroluminescent cell.
Claim 18
Dependent Claim
45 words
An array of pixel elements, where each said pixel element comprises a first transistor coupled to a second transistor, where said second transistor has a source region that is shared by at least one adjacent second transistor and said source region is coupled to ground.
Claim 19
Dependent Claim
45 words
An array of pixel elements, where each said pixel element comprises a first transistor coupled to a second transistor, where said second transistor has a source region that is shared by at least one adjacent second transistor and said source region is coupled to ground.
Claim 20
Dependent Claim
22 words
The array of claim 16 wherein each of said pixel elements comprises an electroluminescent cell that is coupled to said second transistor.
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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) | 2003-08-15 | 2004-02-14 | 2004-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-15 | 2008-02-14 | 2008-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-15 | 2012-02-14 | 2012-08-15 | $7700.00 | Window Closed / Lapsed |