US 2002/0158997 A1 · Liquid crystal device

Abstract

In a liquid crystal panel in which pseudo dot inversion driving is performed, the occurrence of flicker or vertical and horizontal strings is prevented by preventing an alignment shift between individual layers during the fabrication of a TFT array from producing a difference between the respective abilities of thin-film TFTs to charge adjacent pixels (61, 62). For this purpose, the liquid crystal display panel is constructed such that two TFTs which are enclosed by two adjacent image signal lines (21, 22) and scan signal lines (3) and adjacent to each other along the signal lines (21, 22) have respective source electrodes (71, 72) adjacent to the different image signal lines (21, 22). The source electrodes (71, 72) and drain electrodes (81, 82) of the two TFTs connected to the adjacent pixels (61, 62) are alternately arranged such that variations caused by the alignment shift in the sizes and areas of overlapping portions between the individual layers of the TFTs are equal or the same.

Claims41

Dependent claims

A liquid crystal device having a plurality of scan signal lines and a plurality of image signal lines provided orthogonally on a substrate and having thin-film transistors provided in sections enclosed by the scan signal lines and the image signal lines, each of the thin-film transistors serving as a switching element corresponding to one of the sections and controlling transmission of light by a semiconductor layer, the liquid crystal device using patterning to form the signal lines and the thin-film transistors, wherein:

two of the thin-film transistors located between an adjacent two of the image signal lines having respective source electrodes are connected to different image signal lines;
and
the respective gate, source, and drain electrodes of the two thin-film transistors are alignment-shift-compensated electrodes having configurations and structures such that, even if an alignment shift occurs during the formation of the gate, source, and drain electrodes through the patterning, at least one of a capacitance between the gate and drain electrodes and a capacitance between the gate and source electrodes is constant or varies equally in each of the two transistors.

A liquid crystal device having a plurality of scan signal lines and a plurality of image signal lines provided orthogonally on a substrate and having thin-film transistors each provided in sections enclosed by the scan signal lines and the image signal lines, each of the thin-film transistors serving as a switching element corresponding to one of the sections and controlling transmission of light by a semiconductor layer, the liquid crystal device using patterning to form the signal lines and the thin-film transistors, wherein:

two of the thin-film transistors located between an adjacent two of the scan signal lines having respective gate electrodes are connected to different scan signal lines;
and
the respective gate, source, and drain electrodes of the two thin-film transistors are alignment-shift-compensated electrodes having configurations and structures such that, even if an alignment shift occurs during the formation of the gate, source, and drain electrodes through the patterning, at least one of a capacitance between the gate and drain electrodes and a capacitance between the gate and source electrodes is constant or varies equally in each of the two transistors.

Dependencies are inferred from the claim text.

Liquid crystal device

Life of this patent

Liquid crystal device

Life of this patent

Abstract

Claims41