Thin film transistor liquid crystal display
View Patent ↗A thin film transistor liquid crystal display (TFT-LCD) of a line inversion type for block-driving data lines is provided which can prevent a block defect. In accordance with the feature of the present invention, the TFT-LCD includes an extension part such as an extension piece overlapping with a pixel electrode of boundary pixels at a boundary data line applying a data signal to the boundary pixels.
1. A thin film transistor liquid crystal display (TFT-LCD) comprising:
a plurality of pixels arranged in a matrix and divided into a plurality of blocks for block driving, each block having a boundary pixel at a boundary of an adjacent previous block and a non-boundary pixel separated from the boundary by at least the boundary pixel;
a plurality of pixel electrodes formed corresponding to the pixels; and
a plurality of data lines formed corresponding to the pixel electrodes and comprising a boundary data line provided corresponding to the boundary pixel and a non-boundary data line different from the boundary data line corresponding to the non-boundary pixel;
wherein the boundary data line has an extension part overlapping a portion of the pixel electrode corresponding to the boundary pixel, and the non-boundary data line does not include an extension part overlapping a portion of the pixel electrode corresponding to the non-boundary pixel.
2. The TFT-LCD as claimed in claim 1 , comprising a plurality of boundary pixels arranged between an INth data line and an (IN+1)th data line, when N is the number of data lines in a block and I is a natural number obtained by subtracting 1 from the number of blocks constituting a picture of the TFT-LCD.
3. The TFT-LCD as claimed in claim 1 , wherein the extension part is formed by extending a width of the boundary data line toward the pixel electrode corresponding to the boundary pixel.
4. The TFT-LCD as claimed in claim 1 , wherein the extension part protruded from the boundary data line to the pixel electrode corresponding to the boundary pixel.
5. The TFT-LCD as claimed in claim 1 , wherein an area of the extension part is substantially equal to an area of a portion of the pixel electrode of the boundary pixel overlapping the boundary data line.
6. A thin film transistor liquid crystal display (TFT-LCD) for block-driving data lines, comprising:
a substrate;
thin film transistors formed in each pixel to form a matrix, in which a gate electrode crosses an active pattern formed on the substrate and is apart from the active pattern by a gate insulating layer;
a plurality of gate lines connected to gate electrodes of the thin film transistors of the same row in the matrix;
a plurality of data lines electrically connected to drain regions of the thin film transistors of the same column in the matrix so as to apply a data signal to the thin film transistors, the data lines being substantially parallel with one another to pass peripheral parts of the pixels; and
a plurality of pixel electrodes formed in the middle of the pixels so as to be connected to a source region of the thin film transistors, wherein the TFT-LCD further comprises at least one of the plurality of data lines having an extension part overlapping at least one of the plurality of pixel electrodes of a boundauy pixel, and wherein at least one of the plurality of data lines corresponding to a non-boundary pixel does not have an extension part overlapping the non-boundary pixel, to substantially minimize a block defect.
7. The TFT-LCD as claimed in claim 6 , wherein the boundary pixels are arranged at pixels between an INth data line and an (IN+1)th data line, when N is the number of data lines in a block and I is a number obtained by subtracting 1 from the number of blocks constituting a picture of the TFT-LCD.
8. The TFT-LCD as claimed in claim 6 , wherein the pixel electrode is selected from the group consisting of a metallic reflective plate and a transparent electrode.
9. The TFT-LCD as claimed in claim 8 , wherein the transparent electrode comprises material selected from the group consisting of indium tin oxide (ITO) and indium zinc oxide (IZO).
10. The TFT-LCD as claimed in claim 6 , further comprising a storage line for connecting a storage electrode to a row of the matrix, wherein the storage electrode makes a capacitance together with the pixel electrode.
11. The TFT-LCD as claimed in claim 6 , wherein the pixel electrode is separated from the data line by an organic insulating layer, and an embossing is formed on a surface of the organic insulating layer to form a micro lens.
12. A liquid crystal display (LCD), comprising:
a plurality of pixel regions divided into a plurality of blocks for block driving, each block having a boundary pixel region adjacent to a previous block and a non-boundary pixel region spaced apart from the previous block;
a plurality of pixel electrodes formed corresponding to the pixel regions; and
a plurality of data lines comprising a boundary data line overlapping the pixel electrode of the boundary pixel region and a non-boundary data line different from the boundary data line provided corresponding to but not overlapping the pixel electrode of the non-boundary pixel region.
13. The LCD of claim 12 , wherein the pixel electrodes are formed of a transparent conductive material.
14. The LCD of claim 12 , wherein the pixel electrodes are formed of a reflective conductive material.
15. The LCD of claim 12 , wherein the boundary data line comprises a first extension part arranged substantially across the boundary pixel electrode and a second extension part that extends from an end of the first extension part.
16. The LCD of claim 12 , wherein an area of overlap between the pixel electrode of the boundary pixel region and the boundary data line is larger than an area of overlap between the pixel electrode of a non-boundary pixel region and the non-boundary data line.