Liquid crystal display apparatus and method for generating a driver signal based on resistance ratios

A driving method for a liquid crystal display apparatus comprising:

• plural gate wirings formed on a substrate;
• source wirings intersecting with the gate wirings through an insulating film;
• switching elements connected to the source wirings;
• pixel electrodes connected to the source wirings through the switching elements, to which pixel potentials are inputted according to a driving voltage for driving liquid crystals;
• common electrodes, disposed opposite to the pixel electrodes and adapted so that a common potential is inputted thereto, and a voltage supply circuit that includes a plurality of resistors connected to the source wiring and is configured to have a plurality of voltage outputs and at least two switched states, the method comprising the steps of:
• supplying a scanning signal to the gate wirings in such a way as to form a write time, in which a pixel potential is written to the pixel electrode, in one horizontal period;
• inputting the pixel potential to the source wirings in the write time;
• supplying a scanning signal to the gate wrings so that the one horizontal period has a non-write time in which the pixel potential is not written thereto;
• and
• inputting an electric potential being closer to the common potential than the pixel potential to the source wirings in the non-write time,
• wherein in a first switched state during the one horizontal period, supplying the pixel potential supplied to the source wirings is based on an analog voltage generated in the voltage supply circuit using a reference voltage and resistance ratios among the plurality of resistors,
• wherein liquid crystals are driven horizontally to the substrate according to an electric field generated by the pixel potential of the pixel electrode and the common potential of the common electrode,
• wherein, in the first switched state, a first switch is conducted to a reference-voltage side and a second switch is conducted to a ground side, and
• wherein, in a second switched state, both of the first switch and the second switch are conducted to the electric potential closer to the common potential.

A liquid crystal display apparatus comprising:

• plural gate wirings formed on a substrate;
• source wirings intersecting with the gate wirings through an insulating film;
• switching elements connected to the source wirings;
• pixel electrodes connected to the source wirings through the switching elements, to which pixel potentials are inputted according to a driving voltage for driving liquid crystals;
• common electrodes, disposed opposite to the pixel electrodes and adapted so that a common potential is inputted thereto;
• and
• a voltage supply circuit having a plurality of resistors connected to the source wiring and is configured to have a plurality of voltage outputs and at least two switched states,
• wherein a time period corresponding to one horizontal period of the liquid crystal display apparatus includes a first time including a moment at which a state of the switching element changes from an ON-state to an Off-state and a second time that is present in such a way as to be precedent to the first time,
• wherein the pixel potential is inputted to the source wirings in the first time, and wherein an electric potential being closer to the common potential than the pixel potential is inputted to the source wirings in the second time,
• wherein in a first switched state at the first time, the voltage supply circuit is configured to generate an analog voltage based on a reference voltage and ratios among the plurality of resistors, the pixel potentials being generated based on the analog voltage of the voltage supply circuit,
• wherein liquid crystals are driven horizontally to the substrate according to an electric field generated by the pixel potential of the pixel electrode and the common potential of the common electrode,
• wherein the voltage supply circuit includes a first switch connected at a reference-voltage side and a second switch connected at a ground side, the first and second switches being connected to switch the electric potential closer to the common potential, and
• wherein the at least two switched states are caused by switching the first switch and the second switch between ON and OFF states.

A driving method for a liquid crystal display apparatus comprising:

• plural gate wirings formed on a substrate;
• source wirings intersecting with the gate wirings through an insulating film;
• switching elements connected to the source wirings;
• pixel electrodes connected to the source wirings through the switching elements, to which pixel potentials are inputted according to a driving voltage for driving liquid crystals;
• common electrodes, disposed opposite to the pixel electrodes and adapted so that a common potential is inputted thereto, and a voltage supply circuit that includes a plurality of resistors connected to the source wiring and is configured to have a plurality of voltage outputs and at least two switched states, the method comprising the steps of:
• inputting an electric potential being closer to the common potential than the pixel potential to the source wirings in a time period corresponding to one horizontal period of the liquid crystal display apparatus;
• supplying the pixel potential to a pixel electrode until the switching element changes from an ON-state to an OFF-state, wherein the pixel potential is a second pixel potential supplied after a first pixel potential that is closer to the common potential than the second pixel potential is supplied to the source wirings,
• wherein in a first switched state of the voltage supply circuit during the one horizontal period, supplying the pixel potentials to the source wirings is based on an analog voltage generated in the voltage supply circuit using a reference voltage and resistance ratios among the plurality of resistors, and
• wherein the liquid crystal display apparatus is an in-plane switching liquid crystal display apparatus, which drives liquid crystals horizontally to the substrate according to an electric field generated by the pixel potential of the pixel electrode and the common potential of the common electrode,
• wherein, in the first switched state, a first switch is conducted to a reference-voltage side and a second switch is conducted to a ground side, and
• wherein, in a second switched state, both of the first switch and the second switch are conducted to the electric potential closer to the common potential.

A liquid crystal display apparatus comprising:

• plural gate wirings formed on a substrate;
• source wirings intersecting with the gate wirings through an insulating film;
• switching elements connected to the source wirings;
• pixel electrodes connected to the source wirings through the switching elements, to which pixel potentials are inputted according to a driving voltage for driving liquid crystals;
• and
• common electrodes, disposed opposite to the pixel electrodes and adapted so that a common potential is inputted thereto,
• a voltage supply circuit includes a plurality of resistors connected to the source wiring and is configured to have a plurality of voltage outputs and at least two switched states;
• wherein a scanning signal is inputted to the gate wirings so that one horizontal period of the liquid crystal display apparatus has a write time, in which the pixel potential is written to the pixel electrode, and a non-write time in which the pixel potential is not written to the pixel electrode,
• wherein the pixel potential is inputted to the source wiring in the write time, and an electric potential being closer to the common potential than the pixel potential is inputted to the source wiring in the non-write time,
• wherein in a first switched state during the write time, the voltage supply circuit is configured to generate an analog voltage based on a reference voltage and ratios among the plurality of resistors, the pixel potential being generated based on the analog voltage of the voltage supply circuit,
• wherein the liquid crystal display apparatus is an in-plane switching liquid crystal display apparatus, which drives liquid crystals horizontally to the substrate according to an electric field generated by the pixel potential of the pixel electrode and the common potential of the common electrode,
• wherein the voltage supply circuit includes a first switch connected at a reference-voltage side and a second switch connected at a ground side, the first and second switches being connected to switch the electric potential closer to the common potential, and
• wherein the at least two switched states are caused by switching the first switch and the second switch between ON and OFF states.