EP0376329A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal display device
Assignee: Sony Corp
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Filing: 1989-12-28
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Granted: —
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Expires: 2009-12-28
Abstract
Abstract A liquid crystal display unit is provided wherein address lines (13) for two mutually adjacent odd and even rows of pixels (11) arrayed in a matrix are in common, and two vertical pixels on each column can be displayed simultaneously to enable display of an image corresponding to one frame. Capacitor forming electrode wires (14) are supplied with a fixed potential are disposed between omitted rows of address lines eliminated due to the common use thereof, whereby the storage capacitors (Cs) are of a sufficiently high value, even with a high resolution display, to enhance the image quality of the liquid crystal display unit. Since a fixed potential is applied to the capacitor forming electrode wire which forms the storage capacitor, the capacitor does not apply a load to the address line and thereby consistently insures a fast operation. As a result, improvements can be achieved relating to large image area and high resolution. Furthermore, each pixel includes a switching transistor (Tr) which is composed of a thin film transistor having a high carrier mobility and is formed under a single line so that even when the on-resistance of the transistor is lowered, the aperture ratio of the pixel is still enhanced to obtain a high resolution.
Inventors
- 👤 Yuji Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 04:04
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136213
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
1. A liquid crystal display unit, comprising: a plurality of pixels arrayed in a matrix, said pixels each including: a transparent pixel electrode, a switching device for driving each of said pixels, and a storage capacitor; signal lines connected to said plurality of pixels for supplying signals to said pixels, said signal lines extending over a portion of said pixel electrodes; and a plurality of address lines connected to rows of said pixels in said matrix.
Claim 2
Dependent Claim
76 words
1. A liquid crystal display unit, comprising: a plurality of pixels arrayed in a matrix, said pixels each including: a transparent pixel electrode, a switching device for driving each of said pixels, and a storage capacitor; signal lines connected to said plurality of pixels for supplying signals to said pixels, said signal lines extending over a portion of said pixel electrodes; and a plurality of address lines connected to rows of said pixels in said matrix.
Claim 3
Dependent Claim
22 words
A liquid crystal display unit as claimed in claim 1, wherein said switching device of each pixel is a thin film transistor.
Claim 4
Dependent Claim
50 words
A liquid crystal display unit as claimed in claim 2, wherein said thin film transistor of each pixel has a drain region, said drain region of each transistor being electrically connected to a portion of a corresponding one of said pixel electrodes under a respective one of said signal lines.
Claim 5
Dependent Claim
38 words
A liquid crystal display unit as claimed in claim 2, wherein said thin film transistor of each pixel has a gate region, said gate region of each transistor being disposed under a corresponding one of said address lines.
Claim 6
Dependent Claim
44 words
A liquid crystal display unit as claimed in claim 2, wherein said thin film transistor of each pixel has a source region, said source region of each of said transistors being disposed under and connected electrically to a corresponding one of said signal lines.
Claim 7
Dependent Claim
27 words
A liquid crystal display unit as claimed in claim 1, wherein one of said signal lines is disposed along side each column of said matrix of pixels.
Claim 8
Dependent Claim
27 words
A liquid crystal display unit as claimed in claim 1, wherein one of said address lines is disposed along side each row of said matrix of pixels.
Claim 9
Dependent Claim
27 words
A liquid crystal display unit as claimed in claim 2, wherein said thin film transistor of each pixel is an ultrathin film transistor having a high mobility.
Claim 10
Dependent Claim
46 words
A liquid crystal display unit as claimed in claim 1, wherein said capacitor is formed by mutually superimposing a portion of said address -ine and a portion of said pixel electrode, and an interlayer of an insulator film between said address line and said pixel electrode.
Claim 11
Dependent Claim
113 words
A liquid crystal display unit, comprising: a plurality of pixels arrayed in a matrix, said pixels being formed of: transparent pixel electrodes, switching devices connected to drive said pixels, and storage capacitors; signal lines connected to supply signals to odd rows of said pixels in said matrix; signal lines connected to supply signals to even rows of said pixels in said matrix; address lines connected to select alternate rows of said pixels in said matrix, said address lines being n address lines and n+1 address lines; said storage capacitors being formed of electrode leads interposed between said pixels selected by said n address lines and said pixels selected by said n+1 address lines.
Claim 12
Dependent Claim
113 words
A liquid crystal display unit, comprising: a plurality of pixels arrayed in a matrix, said pixels being formed of: transparent pixel electrodes, switching devices connected to drive said pixels, and storage capacitors; signal lines connected to supply signals to odd rows of said pixels in said matrix; signal lines connected to supply signals to even rows of said pixels in said matrix; address lines connected to select alternate rows of said pixels in said matrix, said address lines being n address lines and n+1 address lines; said storage capacitors being formed of electrode leads interposed between said pixels selected by said n address lines and said pixels selected by said n+1 address lines.
Claim 13
Dependent Claim
19 words
A liquid crystal display unit as claimed in claim 10, wherein said switching device is a thin film transistor.
Claim 14
Dependent Claim
61 words
A liquid crystal display unit as claimed in claim 11, wherein said thin film transistor includes a gate insulator layer and a semiconductor thin film, and wherein said storage capacitor is formed by said electrode leads, an extension of said gate insulator layer of said thin film transistor, and an extension of said semiconductor thin film of said thin film transistor.
Claim 15
Dependent Claim
18 words
A liquid crystal display unit as claimed in claim 10, wherein said electrode leads receive a fixed potential.
Claim 16
Dependent Claim
20 words
A liquid crystal display unit as claimed in claim 10, wherein said switching devices are formed under said signal lines.
References Cited (Backward Citations)
No citation records indexed.
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