EP0430592A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
An active matrix display device
Assignee: Sharp Corp
•
Filing: 1990-11-22
•
Granted: —
•
Expires: 2010-11-22
Abstract
Abstract An active matrix display device having low resistance additional capacitor common lines (8) and additional capacitors (27) in which each of the additional capacitors (27) has a first electrode (5) connected to a switching element (25) and a second electrode (6) connected to the additional capacitor common line (8), and the additional capacitor common line (8) is made of the same material as the signal lines (2), so that the possibility of signal delay on the additional capacitor common lines is reduced.
Inventors
- 👤 Takayuki Shimada
- 👤 Yasuhiro Matsushima
- 👤 Yutaka Takafuji
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 00:21
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/136213
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
An active matrix display device comprising a pair of insulating substrates, pixel electrodes arranged in a matrix pattern on the inner side of one of the pair of substrates, a switching element connected to each pixel electrode, a signal line connected to the switching element for supplying a video signal, an additional capacitor for retaining charge in the pixel electrode, and an additional capacitor common line connected to the additional capacitor, said additional capacitor having a first electrode connected to said switching element and a second electrode connected to the additional capacitor common line, said additional capacitor common line being made of the same material as said signal lines.
Claim 2
Dependent Claim
109 words
An active matrix display device comprising a pair of insulating substrates, pixel electrodes arranged in a matrix pattern on the inner side of one of the pair of substrates, a switching element connected to each pixel electrode, a signal line connected to the switching element for supplying a video signal, an additional capacitor for retaining charge in the pixel electrode, and an additional capacitor common line connected to the additional capacitor, said additional capacitor having a first electrode connected to said switching element and a second electrode connected to the additional capacitor common line, said additional capacitor common line being made of the same material as said signal lines.
Claim 3
Dependent Claim
33 words
An active matrix display device according to claim 1, wherein a drive circuit for supplying a video signal to said signal line is formed on the inner side of one of said substrates.
Claim 4
Dependent Claim
22 words
An active matrix display device according to claim 2, wherein a video signal is held by the capacity of said signal line.
Claim 5
Dependent Claim
112 words
An active matrix display device comprising a pair of insulating substrates, pixel electrodes arranged in a matrix pattern on the inner side of one of the pair of substrates, a switching element connected to each pixel electrode, a signal line connecting to the switching element for supplying a video signal, an additional capacitor for retaining charge in the pixel electrode, and an additional capacitor common line connected to one electrode of the additional capacitor, said additional capacitor having a first electrode connected to said switching element and a second electrode connected to said additional capacitor common line, said additional capacitor common line being provided in a parallel relation to said signal line.
Claim 6
Dependent Claim
112 words
An active matrix display device comprising a pair of insulating substrates, pixel electrodes arranged in a matrix pattern on the inner side of one of the pair of substrates, a switching element connected to each pixel electrode, a signal line connecting to the switching element for supplying a video signal, an additional capacitor for retaining charge in the pixel electrode, and an additional capacitor common line connected to one electrode of the additional capacitor, said additional capacitor having a first electrode connected to said switching element and a second electrode connected to said additional capacitor common line, said additional capacitor common line being provided in a parallel relation to said signal line.
Claim 7
Dependent Claim
33 words
An active matrix display device according to claim 4, wherein a drive circuit for supplying a video signal to said signal line is formed on the inner side of one of said substrates.
Claim 8
Dependent Claim
22 words
An active matrix display device according to claim 5, wherein a video signal is held by the capacity of said signal line.
Claim 9
Dependent Claim
101 words
A display device comprising a plurality of pixels, and a plurality of pixel electrodes arranged in a matrix pattern, a switching element for connecting each pixel electrode to a signal line for supplying a video signal, an additional capacitor for retaining charge in the pixel electrode having first and second electrodes disposed such that the first electrode is in electrical contact with the switching element and the second element is in electrical contact with means for maintaining the second electrode at a desired potential characterised in that the second electrode and the means for maintaining the desired potential are distinct elements.
Claim 10
Dependent Claim
101 words
A display device comprising a plurality of pixels, and a plurality of pixel electrodes arranged in a matrix pattern, a switching element for connecting each pixel electrode to a signal line for supplying a video signal, an additional capacitor for retaining charge in the pixel electrode having first and second electrodes disposed such that the first electrode is in electrical contact with the switching element and the second element is in electrical contact with means for maintaining the second electrode at a desired potential characterised in that the second electrode and the means for maintaining the desired potential are distinct elements.
Claim 11
Dependent Claim
24 words
A display device according to claim 7 wherein the second electrode and the means for maintaining the desired potential are formed from different materials.
Claim 12
Dependent Claim
25 words
A display device according to claim 7 or 8 wherein the pixel electrodes and the second electrode are disposed intermediate first and second insulating substrates.
Claim 13
Dependent Claim
35 words
A display device according to claim 9 wherein the means for maintaining the desired potential is an additional capacitor common line disposed on the outer face of one of said first and second insulating substrates.
Claim 14
Dependent Claim
32 words
A display device according to claim 9 or claim 10 wherein the additional capacitor common line is formed from a material similar to that of a signal line supplying the video signal.
Claim 15
Dependent Claim
31 words
A display device according to any one of claims 9 to 11 wherein the additional capacitor common line is disposed in parallel relation to a signal line supplying the video signal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.