Patent ID: 8698788
Filing Date: 2014-04-15
Classification: G09G

Abstract:
1. An active matrix display device, comprising storage capacitor wirings in each of which a storage capacitor electric potential is switched between High level and Low level for each frame, the active matrix display device being capable of switching a common electric potential between a first common electric potential and a second common electric potential, the first common electric potential being greater than the second common electric potential, during the first frame where the storage capacitor electric potential is initially Low level after the active matrix display device is turned on: (i) the first common electric potential being used as the common electric potential, and data signals being supplied to picture elements such that (a) all the picture elements which belong to an identical line in which line data signals, to be written into the picture elements, have an identical first write polarity with respect to the first common electric potential and (b) there is another line to which picture elements belong and in which line data signals, to be written into the picture elements, have a second write polarity, different from the identical first write polarity, with respect to the first common electric potential, (ii) a picture element electrode electric potential of picture elements for a negative write polarity with respect to the first common electric potential, which picture elements belong to a line, being changed to a second electric potential that is greater than the second common electric potential and that is lower than the first common electric potential, by (a) supplying, to the picture elements of the line, data signals, which have a first electric potential that is lower than the first common electric potential and (b) changing the storage capacitor electric potential of a corresponding storage capacitor wiring from Low level to High level after a selection period of selecting the picture elements for the negative write polarity ends, and (iii) (a) data signals, which have a third electric potential that is greater than the first common electric potential, being supplied to picture elements for a positive write polarity with respect to the first common electric potential, which picture elements belong to a line and (b) the storage capacitor electric potential of the corresponding storage capacitor wiring being kept to be Low level after the selection period of selecting the picture elements for the positive write polarity ends, and on and after a second frame: (iv) the second common electric potential is used as the common electric potential, and data signals are supplied to picture elements such that (a) all the picture elements which belong to an identical line have an identical first write polarity with respect to the second common electric potential and (b) there is another line to which picture elements belong and in which line data signals, to be written into the picture elements, have a second write polarity, different from the identical first write polarity, with respect to the second common electric potential, so that AC driving is carried out, (v) a picture element electrode electric potential of picture elements for a positive write polarity with respect to the second common electric potential, which picture elements belong to a line, is changed to the second electric potential, by (a) supplying the data signals having the first electric potential to the picture elements of the line and (b) changing the storage capacitor electric potential of a corresponding storage capacitor wiring from Low level to High level after a writing period of writing in the picture elements for the positive polarity ends, and (vi) a picture element electrode electric potential of picture elements for a negative write polarity with respect to the second common electric potential, which picture elements belong to a line, is changed to a fourth electric potential that is lower than the second common electric potential, by (a) supplying the data signals having the third electric potential to the picture elements of the line and (b) changing the storage capacitor electric potential of a corresponding storage capacitor wiring from High level to Low level after the writing period of writing in the picture elements for the negative write polarity ends, wherein,