Method for driving a liquid crystal display apparatus and driving circuit therefor
First Claim
1. A method of driving an LCD device comprising a step of:
- applying one of an upper image signal outputted from an upper liquid crystal drive circuit and a lower image signal outputted from a lower liquid crystal drive circuit to a plurality of pixels of a selected line by a scanning signal outputted from a scanning signal circuit out of a plurality of pixels disposed in a matrix to display a predetermined image;
wherein, in the applying step, a mixture of two cases exists;
a first case in which a polarity of said upper image signal and a polarity of said lower image signal are inverted with respect to each other in the unit of one vertical period; and
a second case in which the polarity of said upper image signal and the polarity of said lower image signal are not inverted with respect to each other.
1 Assignment
0 Petitions
Accused Products
Abstract
Method for driving LCD device comprises step of: applying one of upper image signal outputted from an upper liquid crystal drive circuit and lower image signal outputted from a lower liquid crystal drive circuit to a plurality of pixels of a selected line by scanning signal outputted from a scanning signal circuit out of the plurality of pixels disposed in matrix to display a predetermined image; wherein there exist in mixture a case where the polarities of the upper image signal and the lower image signal are inverted every one vertical period and a case where the same polarity is maintained. The driving circuit of LCD device of the present invention includes a vertical synchronization signal converting circuit so as to obtain upper image signal and lower image signal.
-
Citations
8 Claims
-
1. A method of driving an LCD device comprising a step of:
-
applying one of an upper image signal outputted from an upper liquid crystal drive circuit and a lower image signal outputted from a lower liquid crystal drive circuit to a plurality of pixels of a selected line by a scanning signal outputted from a scanning signal circuit out of a plurality of pixels disposed in a matrix to display a predetermined image;
wherein, in the applying step, a mixture of two cases exists;
a first case in which a polarity of said upper image signal and a polarity of said lower image signal are inverted with respect to each other in the unit of one vertical period; and
a second case in which the polarity of said upper image signal and the polarity of said lower image signal are not inverted with respect to each other. - View Dependent Claims (2, 3)
-
-
4. A method of driving an LCD device comprising a step of:
-
applying one of an upper image signal outputted from an upper liquid crystal drive circuit and a lower image signal outputted from a lower liquid crystal drive circuit to a plurality of pixels of a selected line by a scanning signal outputted from a scanning signal circuit out of a plurality of pixels disposed in a matrix to display a predetermined image;
wherein, in selecting a first line in each frame, polarities of said upper image signal and said lower image signal are changed every two frames, and timing for changing polarity of said upper image signal is displaced at a rate of one frame to timing for changing polarity of said lower image signal. - View Dependent Claims (5, 6)
-
-
7. A driving circuit for an LCD device comprising at least an upper liquid crystal drive circuit, a lower liquid crystal drive circuit, a scanning signal circuit, a timing control circuit and a vertical synchronization signal converting circuit, said vertical synchronization signal converting circuit outputting a switching timing signal for a first polarity inversion signal and a switching timing signal for a second polarity inversion signal, wherein said switching timing signal for a first polarity inversion signal and said switching timing signal for a second polarity inversion signal are outputted by said vertical synchronization signal converting circuit such that in n frame polarity of a first polarity inversion signal inputted to said upper liquid crystal drive circuit is made inverted to polarity of a second polarity inversion signal inputted to said lower liquid crystal drive circuit;
- and in n+1 frame said polarity of a first polarity inversion signal inputted to said upper liquid crystal drive circuit is in the same polarity as said polarity of a second polarity inversion signal inputted to said lower liquid crystal drive circuit.
- View Dependent Claims (8)
Specification