US 2006/0220014 A1 · Liquid crystal display device and manufacturing method therefor

Abstract

To provide a liquid crystal display device in which capacity value of storage capacitance is large and manufacturing cost is low, and a manufacturing method thereof. A plurality of gate lines is provided on a pixel circuit substrate of a liquid crystal display device. Further, a TFT is provided to each pixel, and a drain line is connected with the drain, and a pixel electrode is connected with the source, and the gate line is connected with the gate electrode. Lower electrodes are made to extend from the gate line. In an area immediately above the lower electrodes connected with the nth gate line from the drain line control circuit side, a pixel electrode coupled to the (n+1)th gate line via the TFT is disposed. Thereby, storage capacitance is formed between the lower electrodes connected with the nth gate line and the pixel electrode coupled to the (n+1)th gate line.

Claims14

Dependent claims

A liquid crystal display device comprising:

a pixel circuit substrate;
a counter substrate;
and
a liquid crystal layer disposed between the pixel circuit substrate and the counter substrate, wherein
the pixel circuit substrate includes:
a substrate;
a transistor provided for each pixel on the substrate;
a lower electrode provided in an area outside an area immediately above an active layer of the transistor;
an insulating film provided so as to cover the lower electrode;
and a pixel electrode provided in an area including an area immediately above the lower electrode on the insulating film, and connected with one of a source and a drain of the transistor, and
storage capacitance is formed between the lower electrode and the pixel electrode.

8 more elements

A method of manufacturing a liquid crystal display device comprising the steps of:

producing a pixel circuit substrate;
producing a counter substrate;
and
forming a liquid crystal layer between the pixel circuit substrate and the counter substrate, wherein
the step of producing the pixel circuit substrate includes the steps of:
forming a semiconductor layer locally on the substrate;
forming a gate insulating film so as to cover the semiconductor layer;
forming a conductive film on the gate insulating film and patterning the conductive film to thereby form a gate electrode and a lower electrode;
introducing impurity into the semiconductor layer so as to form an active layer, and forming a transistor including the active layer, the gate insulating film and the gate electrode;
forming an insulating film so as to cover the gate electrode and the lower electrode;
and forming a pixel electrode so as to be connected with one of a source and a drain of the transistor in an area including an area immediately above the lower electrode on the insulating film.

8 more elements

Dependencies are inferred from the claim text.

Liquid crystal display device and manufacturing method therefor

Life of this patent

Liquid crystal display device and manufacturing method therefor

Life of this patent

Abstract

Claims14