Plasma display device and capacitive load driving circuit
View Patent ↗A problem is to be solved that there is to be provided a plasma display device capable of generating driving signals with less variation in delay time and without carrying out any phase adjustment. There is provided a plasma display device including; a first display electrode; a second display electrode adapted to cause a discharge to occur between the first display electrode and the second display electrode; a first display electrode drive circuit for applying a discharge voltage to the first display electrode; and a second display electrode drive circuit for applying a discharge voltage to the second display electrode. The first display electrode drive circuit has a first output element for supplying a first electric potential to the first display electrode in accordance with a first input signal which is inputted by using a transformer.
1. A plasma display device, comprising;
a first display electrode;
a second display electrode adapted to cause a discharge to occur between the first display electrode;
a first display electrode drive circuit to apply a discharge voltage to the first display electrode; and
a second display electrode drive circuit to apply a discharge voltage to the second display electrode,
wherein the first display electrode drive circuit comprising;
a first modulation circuit to modulate and output a signal to be inputted from a first input terminal,
a first transformer which has a primary winding and a secondary winding, the primary winding being connected to the output of the first modulation circuit,
a first demodulation circuit to demodulate and output a signal to be inputted from the secondary winding of the first transformer, and
a first output element for supplying a high level electric potential as a first electric potential to the first display electrode in accordance with the output signal from the first demodulation circuit; and
a second modulation circuit to modulate and output a signal to be inputted from a second input terminal;
a second transformer which has a primary winding and a secondary winding, the primary winding being connected to the output of the second modulation circuit;
a second demodulation circuit to demodulate and output a signal to be inputted from the secondary winding of the second transformer;
a second output element for supplying a low level electric potential to the first display electrode in accordance with the output signal from the second demodulation circuit;
a first coil connected to the first display electrode;
a third output element which inputs a signal from a third input terminal by using a transformer and connects a second electric potential to the first display electrode through the first coil in accordance with the input signal;
a first diode to make a forward current flow from the second electric potential to the first display electrode through the third output element;
a second coil connected to the first display electrode;
a fourth output element which inputs a signal from a fourth input terminal by using a transformer and connects the second electric potential to the first display electrode through the second coil in accordance with the input signal; and
a second diode to make a forward current flow from the first display electrode to the second electric potential through the fourth output element and the second coil.
2. A capacitive load driving circuit, comprising;
a first modulation circuit to modulate and output a signal to be inputted from a first input terminal;
a first transformer which has a primary winding and a secondary winding, the primary winding being connected to the output of the first modulation circuit;
a first demodulation circuit to demodulate and output a signal to be inputted from the secondary winding of the first transformer;
a first output element for supplying a high level electric potential as a first electric potential to a capacitive load in accordance with the output signal from the first demodulation circuit;
a second modulation circuit to modulate and output a signal to be inputted from a second input terminal;
a second transformer which has a primary winding and a secondary winding, the primary winding being connected to the output of the second modulation circuit;
a second demodulation circuit to demodulate and output a signal to be inputted from the secondary winding of the second transformer;
a second output element for supplying a low level electric potential to the capacitive load in accordance with the output signal from the second demodulation circuit;
a first coil connected to the capacitive load;
a third output element which inputs a signal from a third input terminal by using a transformer and connects a second electric potential to the capacitive load through the first coil in accordance with the input signal;
a first diode to make a forward current flow from the second electric potential to the capacitive load through the third output element and the first coil;
a second coil connected to the capacitive load;
a fourth output element which inputs a signal from a fourth input terminal by using a transformer and connects a second electric potential to the capacitive load through the second coil in accordance with the input signal; and
a second diode to make a forward current flow from the capacitive load to the second electric potential through the fourth output element and the second coil.