Tft with reduced parasitic capacitance
CA 2135995 C · Owner: Ois Optical Imaging Systems, Inc. · Inventors: Den Boer, Willem; Yang, Mohshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thin film transistor (TFT) array in an active matrix liquid crystal display (AMLCD) including a centrally located round source electrode substantially completely surrounded by a substantially annular or circular shaped drain electrode. The geometric design of the TFT of this invention provides for a thin film transistor having a reduced parasitic capacitance and decreased photosensitivity. The TFTs of this invention are located at the intersections of gate and drain lines of an active matrix LCD array thereby increasing the size of the pixel display openings of the matrix array.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 16, 1994 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.