Patent EP0518643A2 successfully refreshed from Google Patents.
EP0518643A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A drive circuit for a display apparatus
Assignee: Sharp Corp
•
Filing: 1992-06-10
•
Granted: —
•
Expires: 2012-06-10
Abstract
Abstract A drive circuit for a display apparatus having a display section including a pixel, a switching element connected to the pixel and a scanning electrode connected to the switching element, and a pixel electrode and a counter electrode being provided on the opposite sides of the pixel, includes a circuit for applying a first oscillating voltage to the counter electrode, and for applying a second oscillating voltage having the same phase and the same amplitude as the first oscillating voltage to the scanning electrode during a period when the switching element is to be in off-state.
Inventors
- 👤 Takaaki Iemoto
- 👤 Koji Kumada
- 👤 Takashi Ohnishi
- 👤 Hideki Yakushigawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 02:01
CPC Classifications
G; G09; G09G; G09G1/00; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3674; G09G3/3677; G09G3/22; G09G3/30; G09G3/3648; G09G3/3696; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/0267; G09G2320/00; G09G2320/02; G09G2320/0219; G09G3/3614
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A drive circuit for a display apparatus having a display section including a pixel, a switching element connected to said pixel and a scanning electrode connected to said switching element, and a pixel electrode and a counter electrode being provided on the opposite sides of said pixel, said drive circuit comprising: a first means for applying a first oscillating voltage to said counter electrode; and a second means for applying a second oscillating voltage having the same phase and the same amplitude as said first oscillating voltage to said scanning electrode during a period when said switching element is to be in off-state.
Claim 2
Dependent Claim
66 words
A drive circuit for a display apparatus according to claim 1, wherein said second means selectively applies said second oscillating voltage having the same phase and the same amplitude as said first oscillating voltage and a third oscillating voltage having the same phase as said first oscillating voltage to said scanning electrode, depending on whether said switching element is to be in off-state or in on-state.
Claim 3
Dependent Claim
105 words
A display apparatus comprising: a display section including a pixel, a switching element connected to said pixel and a scanning electrode connected to said switching element, and a pixel electrode and a counter electrode being provided on the opposite sides of said pixel; and a drive circuit for driving said display section, including a first means for applying a first oscillating voltage to said counter electrode, and a second means for applying a second oscillating voltage having the same phase and the same amplitude as said first oscillating voltage to said scanning electrode during a period when said switching element is to be in off-state.
Claim 4
Dependent Claim
62 words
A display apparatus according to claim 3, wherein said second means selectively applies said second oscillating voltage having the same phase and the same amplitude as said first oscillating voltage and a third oscillating voltage having the same phase as said first oscillating voltage to said scanning electrode, depending on whether said switching element is to be in off-state or in on-state.
Claim 5
Dependent Claim
17 words
A display apparatus according to claim 3, wherein said switching element is a thin film transistor (TFT).
Claim 6
Independent Claim
97 words
A method of driving a display apparatus having a display section including a pixel, a switching element connected to said pixel and a scanning electrode connected to said switching element, and a pixel electrode and a counter electrode being provided on the opposite sides of said pixel, said method comprising the steps of: applying a first oscillating voltage to said counter electrode; and applying a second oscillating voltage having the same phase and the same amplitude as said first oscillating voltage to said scanning electrode during a period when said switching element is to be in off-state.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.