Back to results
US 6,888,587 B2Granted
Liquid crystal displays
AssigneeKoninklijke Philips Electronics N.V.
InventorSteven C. Deane
Life of this patent
Estimating the term…
Abstract
A method of forming an active plate for a liquid crystal display using top gate TFTs is described. A black organic light shield layer (73) is used under the TFTs to shield the channel (91) of the TFTs from light passing through a substrate (71) from below. The active plate may be a high aperture plate having pixel electrodes (99) overlapping the row and column (79) conductors. The organic light shield layer may mask the gaps (102) between pixel electrodes.
Claims11
An active plate for a liquid crystal display, comprising:
- a transparent substrate;
- top gate thin-film transistors each having a source and a drain, a channel region connecting the source and drain and a top gate over the channel;
- pixel electrodes connected to the top gate thin-film transistors;
- and
- an organic light shield layer under the thin film transistors patterned to shield at least the channel regions of the top gate thin film transistors from light passing through the transparent substrate from below;
- and
- a planarisation layer over the organic light shield layer and under the top-gate thin-film transistors.
4 more elements
A method of making an active plate for a liquid crystal display, comprising:
- depositing and patterning an organic light shield layer on a transparent insulating substrate;
- depositing a source, drain and channel layer above the patterned organic light shield layer;
- depositing an insulating layer at least over the source, drain and channel layer to act as a gate insulator layer;
- depositing and patterning a gate layer over the insulating layer, to form a plurality of thin film transistors each having a source, a drain, a channel and a gate;
- and
- forming a pixel electrode layer connected to one of the source and drain;
- wherein the organic light shield layer is patterned to shield at least the channel from light passing through the transparent substrate from below.
4 more elements
Dependencies are inferred from the claim text.