Liquid crystal display
View Patent ↗A common electrode driving circuit is provided on a TFT substrate as a first substrate. Striped common electrodes are formed along the layout of pixels, such as data lines (or scanning lines), on a common substrate as a second substrate. The common electrode driving circuit inverts a common electrode voltage that is applied to a common electrode of an odd-number order, relative to a common electrode voltage that is applied to a common electrode of an even-number order. The common electrode driving circuit inverts these common electrode voltages to match the polarity inversion period at the same time. Based on this, a common inversion driving system is realized, and flicker is reduced according to a lengthwise line (or crosswise line) inversion driving system.
1. A liquid crystal display comprising:
a first substrate on which pixel electrodes and thin film transistors are disposed in a matrix shape of m rows and n columns;
a second substrate on which a plurality of common electrodes are disposed in a stripe shape corresponding to the n columns of electrodes;
a liquid crystal layer provided between said first substrate and said second substrate;
a common electrode driving circuit provided on said first substrate on which are disposed said thin film transistors, and which applies mutually-inverted voltages to said common electrodes of odd-number orders and to said common electrodes of even-number orders respectively;
first conductors which electrically connect to said common electrodes of odd-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said common electrodes of odd-number orders; and
second conductors which electrically connect to said common electrodes of even-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said common electrodes of even-number orders.
2. The liquid crystal display according to claim 1 , wherein said common electrode driving circuit inverts voltages to be applied to said common electrodes, at a predetermined interval.
3. The liquid crystal display according to claim 1 , wherein said common electrodes of odd-number orders are electrically connected to each other on said second substrate, and said common electrodes of even-number orders are electrically connected to each other on said second substrate.
4. A liquid crystal display comprising:
a first substrate on which pixel electrodes and thin film transistors are disposed in a matrix shape of m rows and n columns;
a second substrate on which a plurality of common electrodes are disposed in a stripe shape corresponding to the m rows of electrodes;
a liquid crystal layer provided between said first substrate and said second substrate;
a common electrode driving circuit provided on said first substrate on which are disposed said thin film transistors, and which applies mutually-inverted voltages to said common electrodes of odd-number orders and to said common electrodes of even-number orders respectively;
first conductors which electrically connect to said common electrodes of odd-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said common electrodes of odd-number orders; and
second conductors which electrically connect to said common electrodes of even-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said common electrodes of even-number orders.
5. The liquid crystal display according to claim 4 , wherein said common electrode driving circuit inverts voltages to be applied to said common electrodes, at a predetermined interval.
6. The liquid crystal display according to claim 4 , wherein said common electrodes of odd-number orders are electrically connected to each other on said second substrate, and said common electrodes of even-number orders are electrically connected to each other on said second substrate.
7. A liquid crystal display comprising:
a first substrate on which pixel electrodes and thin film transistors are disposed in a matrix shape of m rows and n columns;
a second substrate on which a plurality of first common electrodes are disposed in a stripe shape corresponding to the n columns of electrodes, and also a plurality of second common electrodes are disposed in a stripe shape corresponding to the m rows of electrodes, with said first common electrodes and said second common electrodes being insulated from each other via an insulation layer;
a liquid crystal layer provided between said first substrate and said second substrate;
a common electrode driving circuit provided on said first substrate on which are disposed said thin film transistors, and which applies mutually-inverted voltages to said first common electrodes of odd-number orders and to said first common electrodes of even-number orders respectively, or which applies mutually-inverted voltages to said second common electrodes of odd-number orders and to said second common electrodes of even-number orders respectively;
first conductors which electrically connect to said first common electrodes of odd-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said first common electrodes of odd-number orders;
second conductors which electrically connect to said first common electrodes of even-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said first common electrodes of even-number orders;
third conductors which electrically connect to said second common electrodes of odd-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said second common electrodes of odd-number orders; and
fourth conductors which electrically connect to said second common electrodes of even-number orders, respectively, to said common electrode driving circuit in order to apply a voltage generated by said common electrode driving circuit to said second common electrodes of even-number orders.
8. The liquid crystal display according to claim 7 , wherein said common electrode driving circuit inverts voltages to be applied to said common electrodes, at a predetermined interval.
9. The liquid crystal display according to claim 7 , wherein said common electrodes of odd-number orders are electrically connected to each other on said second substrate, and said common electrodes of even-number orders are electrically connected to each other on said second substrate.