Pixel structure of thin film transistor liquid crystal display
AssigneeWintek Corporation
InventorsChe-Fu Tsai, Yi-Lin Chou, Wen-Chun Wang
Life of this patent
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Abstract
A pixel structure of a thin film transistor liquid crystal display employs a design of three metal layers and includes an organic insulating layer between a data signal line and a common electrode for reducing a parasitic capacitance, while a passivation layer included between the common electrode and a pixel electrode acts as a storage capacitor required for the pixels, so as to achieve a high aperture ratio, and the common electrode can act as a shielding bar for enhancing the display contrast.
Claims20
A method for producing a pixel structure of a thin film transistor liquid crystal display, comprising:
- preparing a substrate;
- coating a first metal conductive material on a surface of the substrate to produce a first metal conductive layer, so that the first metal conductive layer forms a gate electrode of a thin film transistor structure and a scan signal line of a pixel;
- coating a first insulating layer and a semiconductor layer onto a surface of the first metal conductive layer;
- conducting a pattern process for the semiconductor layer, and coating a second metal conductive layer onto a surface of the semiconductor layer, and conducting the pattern process for the second metal conductive layer to produce a drain electrode and a source electrode of the thin film transistor structure;
- coating at least one second insulating layer onto a surface of the second metal conductive layer by the thin film process;
- coating a third metal conductive layer onto a surface of the second insulating layer by the thin film process, and then coating a passivation layer onto a surface of the third metal conductive layer, and forming a contact hole;
- and
- forming a transparent conductive layer, and producing a pattern of a pixel electrode by the pattern process, so that the pixel electrode is electrically connected to the source electrode of the thin film transistor structure through the contact hole.
A pixel structure of a thin film transistor liquid crystal display, comprising:
- a substrate;
- a first metal conductive layer, disposed on a surface of the substrate;
- a first insulating layer, disposed on surfaces of the first metal conductive layer and the substrate;
- a semiconductor layer, disposed on a surface of the first insulating layer;
- a second metal conductive layer, disposed on surfaces of the first insulating layer and the semiconductor layer;
- a second insulating layer, disposed on a surface of the second metal conductive layer;
- a third metal conductive layer, disposed on a surface of the second insulating layer;
- a passivation layer, disposed on surfaces of the second insulating layer and the third metal conductive layer;
- a transparent conductive layer, disposed on a surface of the passivation layer;
- wherein the passivation layer included between the third metal conductive layer and the transparent conductive layer acts as a storage capacitor required for the pixel.
Dependencies are inferred from the claim text.