Liquid crystal display with brightness-compensated pixels
View Patent ↗A liquid crystal display (LCD) is disclosed. The pixels of the LCD each have storage capacitors, and the capacitances of the storage capacitors of pixels of different colors are different.
1. A liquid crystal display (LCD), comprising:
a pixel unit including data lines, gate lines, and storage lines; and
a plurality of pixels coupled to the data lines, gate lines and storage lines, wherein each of the pixels comprises:
a thin film transistor (TFT) coupled to one of the gate lines and to one of the data lines,
a liquid crystal capacitor coupled to the TFT, the liquid crystal capacitor having a terminal connected to a storage electrode, and
a storage capacitor formed by one of the storage lines and the storage electrode overlapping the one storage line,
wherein each pixel is configured to display light of one of a plurality of colors,
wherein the areas of overlapping storage electrodes and storage lines of pixels of different colors are different from each other,
wherein the colors are red, green, and blue, and
wherein, in the blue pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 1.67,
wherein, in the green pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 3.03, and
wherein, in the red pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 4.09.
2. The LCD as claimed in claim 1 , wherein the area of the storage electrode overlapping the storage line of the blue pixel is less than the corresponding areas of the red and green pixels.
3. The LCD as claimed in claim 1 , wherein the storage lines are connected to a storage signal generator configured to apply storage signals as boost voltages.
4. The LCD as claimed in claim 1 , wherein the storage lines are alternately arranged with the gate lines.
5. The LCD as claimed in claim 1 , wherein the gate lines and the storage lines are arranged in a first direction, and the data lines are arranged in a second direction.
6. A liquid crystal display (LCD), comprising:
a plurality of pixels, each pixel configured to selectively transmit light for one of a plurality of colors, and each pixel comprises:
a liquid crystal capacitor having a terminal connected to a storage electrode,
a thin film transistor (TFT) configured to selectively connect a data signal to the storage electrode, and
a storage line configured to be selectively driven with a boost voltage,
wherein the storage electrode overlaps the storage line at selected portions so as to form a storage capacitor configured to feed the boost voltage to the liquid crystal capacitor,
wherein the capacitance of the storage capacitors of the pixels of one of the colors is different from the capacitance of the storage capacitors of the pixels of another of the colors,
wherein the colors are red, green, and blue and,
wherein, in the blue pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 1.67,
wherein, in the green pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 3.03, and
wherein, in the red pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 4.09.
7. The LCD as claimed in claim 6 , wherein the capacitance of the storage capacitors of the blue pixels is less than the capacitance of the storage capacitors of the green and red pixels.
8. A liquid crystal display (LCD), comprising:
a plurality of pixels, each pixel configured to selectively transmit light for one of a plurality of colors, and each pixel comprises:
a liquid crystal capacitor,
a thin film transistor (TFT) configured to selectively connect a data signal to the liquid crystal capacitor, and
a storage capacitor configured to feed a boost voltage to the liquid crystal capacitor,
wherein the capacitance of the storage capacitors of the pixels of one of the colors is different from the capacitance of the storage capacitors of the pixels of another of the colors,
wherein the colors are red, green, and blue and,
in the blue pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 1.67,
wherein, in the green pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 3.03, and
wherein, in the red pixels, the ratio of the capacitance of the storage capacitor to the capacitance of the liquid crystal capacitor is 4.09.
9. The LCD as claimed in claim 8 , wherein the capacitance of the storage capacitors of the blue pixels is less than the capacitance of the storage capacitors of the green and red pixels.