Method for detecting storage voltage, display apparatus using the storage voltage and method for driving the display apparatus
View Patent ↗A method for detecting a storage voltage, a display apparatus using the storage voltage and a method for driving the display apparatus. The method for detecting the storage voltage includes applying a test voltage to a storage line in a display panel having an active layer disposed between the storage line and a data line while varying the test voltage, the active layer being in an active state or an inactive state according to the test voltage, and detecting the storage voltage corresponding to the test voltage in an inactive state of the active layer. Thus, the display panel is driven by using the detected storage voltage, so that an aperture ratio may be increased and current consumption may be decreased.
1. A display apparatus comprising:
a display substrate having an active layer disposed between a storage line and a data line overlapping the storage line; and
a power supplying part which supplies a storage voltage to the storage line, the active layer being in an inactive state by the storage voltage.
2. The display apparatus of claim 1 , wherein the storage voltage is in a range between approximately −20 V and approximately 12 V.
3. The display apparatus of claim 2 , wherein the display substrate comprises:
a first metal pattern formed on a substrate, and comprising a gate line and the storage line, the gate line receives a gate signal provided from the power supplying part;
a first insulating layer formed on the substrate on which the first metal pattern is formed;
a second metal pattern formed on the first insulating layer, and comprising a data line at least partially overlapping with the storage line and receiving a data signal supplied from the power supplying part;
a second insulating layer formed on the substrate on which the second metal pattern is formed; and
a pixel electrode formed on the second insulating layer corresponding to each pixel, and partially overlapping with the storage line.
4. The display apparatus of claim 3 , wherein the active layer is formed between the first insulating layer and the second metal pattern.
5. The display apparatus of claim 4 , wherein the active layer comprises an active protrusion portion which protrudes to an outside of the second metal pattern.
6. The display apparatus of claim 5 , wherein the storage line comprises:
a storage portion which extends parallel with the gate line; and
a light-blocking portion which extends along the data line from the storage portion to overlap with the data line.
7. The display apparatus of claim 6 , wherein a width of the light-blocking portion is larger than that of the data line and that of the active layer.
8. The display apparatus of claim 6 , wherein the storage portion completely overlaps with the pixel electrode in each pixel.
9. The display apparatus of claim 6 , wherein the storage portion comprises a thin width and is formed adjacent to the gate line located in an upper side of the display substrate.
10. The display apparatus of claim 4 , wherein the active layer is a same shape as the second metal pattern.
11. The display apparatus of claim 3 , wherein the storage line is formed along an edge of each pixel to form a storage capacitor.
12. The display apparatus of claim 2 , wherein the storage voltage is in a range between approximately −20 V and approximately 0 V.
13. The display apparatus of claim 12 , wherein the storage voltage is in a range between approximately −7 V and approximately −1 V.