Display panel driving apparatus of a simplified structure

A driving apparatus for generating a driving pulse to be applied to each of a plurality of row electrodes and a plurality of column electrodes of a display panel, said plurality of column electrodes being arranged to be perpendicular to said row electrodes, comprising:

• a DC power source for generating a DC voltage, wherein said DC power source is a variable DC power source which can vary a voltage value of said DC voltage;
• a first capacitor connected in parallel with said DC power source;
• a coil with one end directly connected to a positive side terminal of said DC power source, wherein a potential change at the second end of said coil is outputted as said driving pulse;
• a switch operable to alternately perform a connection and a disconnection between a second end of said coil and a negative side terminal of said DC power source;
• a diode whose cathode is connected to the other end of said coil and whose anode is connected to the negative side terminal of said DC power source;
• a second capacitor connected in parallel with said diode;
• a peak voltage value detector operable to detect a peak voltage value of said driving pulse;
• and
• a stabilizer operable to maintain a peak value of said driving pulse at a predetermined value in accordance with said peak voltage value, and further operable to change a value of said DC voltage to be generated by said variable DC power source in accordance with said peak voltage value.

A driving apparatus for generating a driving pulse to be applied to each of a plurality of row electrodes and a plurality of column electrodes of a display panel, said plurality of column electrodes being arranged to be perpendicular to said row electrodes, comprising:

• a DC power source for generating a DC voltage;
• a first capacitor connected in parallel with said DC power source;
• a coil with one end directly connected to a positive side terminal of said DC power source;
• a switch operable to alternately perform a connection and a disconnection between a second end of said coil and a negative side terminal of said DC power source;
• and
• a second capacitor connected in parallel with said diode, wherein a potential change at the second end of said coil is outputted as said driving pulse and a ratio between a period of time of said connection and a period of time of said disconnection in said switch is adjusted in accordance with said peak voltage value.

A driving apparatus for generating a driving pulse to be applied to each of a plurality of row electrodes and a plurality of column electrodes of a display panel, said plurality of column electrodes being arranged to be perpendicular to said row electrodes, comprising:

• a DC power source for generating a DC voltage;
• a first capacitor connected in parallel with said DC power source;
• a coil with one end directly connected to a positive side terminal of said DC power source, wherein a potential change at the second end of said coil is outputted as said driving pulse;
• a switch operable to alternately perform a connection and a disconnection between a second end of said coil and a negative side terminal of said DC power source;
• a diode whose cathode is connected to the other end of said coil and whose anode is connected to the negative side terminal of said DC power source;
• a second capacitor connected in parallel with said diode;
• a peak voltage value detector operable to detect a peak voltage value of said driving pulse;
• and
• a stabilizer operable to maintain a peak value of said driving pulse at a predetermined value in accordance with said peak voltage value, wherein said stabilizer adjusts a ratio between a period of time of said connection and a period of time of said disconnection in said switch in accordance with said peak voltage value.

A driving apparatus for generating a driving pulse to be applied to each of a plurality of row electrodes and a plurality of column electrodes of a display panel, said plurality of column electrodes being arranged to be perpendicular to said row electrodes, comprising:

• a DC power source for generating a DC voltage;
• a first capacitor connected in parallel with said DC power source;
• a coil with one end directly connected to a positive side terminal of said DC power source, wherein a potential change at the second end of said coil is outputted as said driving pulse;
• a switch operable to alternately perform a connection and a disconnection between a second end of said coil and a negative side terminal of said DC power source;
• a diode whose cathode is connected to the other end of said coil and whose anode is connected to the negative side terminal of said DC power source;
• and
• a second capacitor connected in parallel with said diode,
• wherein a switching period of said connection and said disconnection in said switch is adjusted in accordance with said peak voltage value.

A driving apparatus for generating a driving pulse to be applied to each of a plurality of row electrodes and a plurality of column electrodes of a display panel, said plurality of column electrodes being arranged to be perpendicular to said row electrodes, comprising:

• a DC power source for generating a DC voltage;
• a first capacitor connected in parallel with said DC power source;
• a coil with one end directly connected to a positive side terminal of said DC power source, wherein a potential change at the second end of said coil is outputted as said driving pulse;
• a switch operable to alternately perform a connection and a disconnection between a second end of said coil and a negative side terminal of said DC power source;
• a diode whose cathode is connected to the other end of said coil and whose anode is connected to the negative side terminal of said DC power source;
• a second capacitor connected in parallel with said diode;
• a peak voltage value detector operable to detect a peak voltage value of said driving pulse;
• and
• a stabilizer operable to maintain a peak value of said driving pulse at a predetermined value in accordance with said peak voltage value, wherein said stabilizer adjusts a switching period of said connection and said disconnection in said switch in accordance with said peak voltage value.