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US5373378A
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Active matrix type liquid crystal display device with peripheral pixel electrodes attached directly to signal lines
Assignee: Japan Display Central Inc
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Filing: 1993-04-28
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Granted: 1994-12-13
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Expires: 2013-04-28
Abstract
Abstract Pixel electrodes in the periphery of a thin film transistor array (peripheral part of the display screen) of an active matrix type liquid crystal display device are directly electrically shortcircuited with signal lines, whereby an alternating current signal is always applied to the pixel electrodes without being passed through a thin film transistor as a switching element. Thereby the liquid crystal arranged on the peripheral part of the display screen is driven in a static state resulting in a high stability against the display characteristics.
Inventors
- 👤 Yoneharu Takubo
- 👤 Ikunori Kobayashi
- 👤 Tetsu Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:44
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/1368; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3648; G09G2300/00; G09G2300/04; G09G2300/0421; G09G2300/043; G09G2310/00; G09G2310/02; G09G2310/0232
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
86 words
An active matrix type liquid crystal display device with a thin film transistor array for driving pixels in accordance with driving signals applied from signal lines when selected by corresponding scan lines; wherein each of pixel electrodes of pixels arranged within an area of a display screen is connected to corresponding signal line through corresponding one of thin film transistors forming said thin film transistor array, and each of pixel electrodes of peripheral pixels arranged outside said display screen is connected to corresponding signal line directly.
Claim 2
Dependent Claim
86 words
An active matrix type liquid crystal display device with a thin film transistor array for driving pixels in accordance with driving signals applied from signal lines when selected by corresponding scan lines; wherein each of pixel electrodes of pixels arranged within an area of a display screen is connected to corresponding signal line through corresponding one of thin film transistors forming said thin film transistor array, and each of pixel electrodes of peripheral pixels arranged outside said display screen is connected to corresponding signal line directly.
Claim 3
Dependent Claim
33 words
The active matrix type liquid crystal display device according to claim 1 wherein an alternating current signal of 60 Hz or higher is applied to each signal line connected to said peripheral pixels.
References Cited (Backward Citations)
JPS58184758A
Cited
JPS63200127A
Cited
JPS63236009A
Cited
JPH01180526A
Cited
JPH0450923A
Cited
US5285301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |