Thin film transistor array panel and LCD having plural red, green and blue pixels in which each color pixel includes first and second subpixel electrodes having different voltage/area ratios with respect to each other and for each color pixel
View Patent ↗The invention provides a LCD including an insulating substrate; a plurality of first signal lines formed on the insulating substrate; a plurality of second signal lines crossing and insulated from the first signal lines; a plurality of thin film transistors (TFT) coupled with the first and second signal lines; and a plurality of pixels including a plurality of first sub-pixel electrodes coupled with the TFTs and a plurality of second sub-pixel electrodes capacitively coupled with the first sub-pixel electrodes, wherein the pixels include a red (R) pixel, a green (G) pixel, and a blue (B) pixel and a voltage ratio or an area ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode is different among the R, G, and B pixels to improve a brightness ratio of R, G, and B components at a lateral position.
1. A liquid crystal display, comprising:
an insulating substrate;
a plurality of first signal lines formed on the insulating substrate;
a plurality of second signal lines crossing the first signal lines and insulated from the first signal lines;
a plurality of thin film transistors coupled with the first signal lines and the second signal lines; and
a plurality of pixels comprising a plurality of first sub-pixel electrodes coupled with the thin film transistors and a plurality of second sub-pixel electrodes capacitively coupled with the first sub-pixel electrodes,
wherein
pixels of the plurality of pixels comprise a red pixel, a green pixel and a blue pixel,
the red pixel comprises a red first sub-pixel electrode and a red second sub-pixel electrode, the green pixel comprises a green first sub-pixel electrode and a green second sub-pixel electrode, and the blue pixel comprises a blue first sub-pixel electrode and a blue second sub-pixel electrode; and
voltage ratios of the second sub pixel electrode with respect to the first sub-pixel electrode for each of the green pixel and the blue pixel are less than a voltage ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode for the red pixel.
2. The liquid crystal display of claim 1 , wherein the voltage ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode for the green pixel is less than the voltage ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode for blue pixel.
3. The liquid crystal display of claim 1 , wherein the voltage ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode for the red pixel is about 0.675 to about 0.725, wherein the voltage ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode for the green pixel is about 0.600 to about 0.650, and wherein the voltage ratio of the second sub-pixel electrode with respect to the first sub-pixel electrode for the blue pixel is about 0.650 to about 0.700.
4. A thin film transistor array panel, comprising;
an insulating substrate;
a plurality of first signal lines formed on the insulating substrate;
a plurality of second signal lines crossing the first signal lines and insulated from the first signal lines;
a plurality of thin film transistors coupled with the first signal lines and the second signal lines; and
a plurality of pixels comprising a plurality of first sub-pixel electrodes coupled with the thin film transistors, a plurality of coupling electrodes coupled with the thin film transistors, and a plurality of second sub-pixel electrodes overlapping the coupling electrodes,
wherein:
pixels of the plurality of pixels comprise a red pixel, a green pixel and a blue pixel,
the red pixel comprises a red first sub-pixel electrode and a red second sub-pixel electrode, the green pixel comprises a green first sub-pixel electrode and a green second sub-pixel electrode, and the blue pixel comprises a blue first sub-pixel electrode and a blue second sub-pixel electrode; and
an overlapping area of a first coupling electrode and a second coupling electrode of the plurality of coupling electrodes and each of the second sub-pixel electrodes for the green pixel and the blue pixel, respectively, are less than an overlapping area of a third coupling electrode of the plurality of coupling electrodes and the second sub-pixel electrode for the red pixel.
5. The thin film transistor array panel of claim 4 , wherein the overlapping area of the first coupling electrode and the second sub-pixel electrode for the green pixel is less than the overlapping area of the second coupling electrode and the second sub-pixel electrode for the blue pixel.
6. A liquid crystal display, comprising:
an insulating substrate;
a plurality of first signal lines formed on the insulating substrate;
a plurality of second signal lines crossing the first signal lines and insulated from the first signal lines;
a plurality of thin film transistors coupled with the first signal lines and the second signal lines; and
a plurality of pixels comprising a plurality of first sub-pixel electrodes coupled with the thin film transistors and a plurality of second sub-pixel electrodes capacitively coupled with the first sub-pixel electrodes,
wherein:
pixels of the plurality of pixels comprise a red pixel, a green pixel, and a blue pixel,
the red pixel comprises a red first sub-pixel electrode and a red second sub-pixel electrode, the green pixel comprises a green first sub-pixel electrode and a green second sub-pixel electrode and the blue pixel comprises a blue first sub-pixel electrode and a blue second sub-pixel electrode; and
ratios of an area of the second sub-pixel electrode with respect to an area of the first sub-pixel electrode for each of the green pixel and the blue pixel are less than a ratio of an area of the second sub pixel electrode with respect to the first sub-pixel electrode for the red pixel.