JPS63162328U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a circuit diagram showing an embodiment of this invention, Figure 2 is a circuit diagram showing an embodiment of this invention.
The figure is a circuit diagram showing the path through which the charging current flows when initially charging the large-capacity capacitor 8 in the circuit of FIG. 1, and FIG.
A diagram showing the energy supplied by the negative voltage source and the energy dissipated or accumulated in each main part. Figure 4 shows the charging current that flows when charging the liquid crystal display element with the positive voltage source in the circuit of Figure 1. 5 is a circuit diagram showing the path of the discharge current when discharging the charge of the liquid crystal display element charged by the positive voltage source in the circuit of FIG. Figure 6 is a circuit diagram showing the path of the charging current that flows when charging the liquid crystal display element with a negative voltage source in the circuit of Figure 1, and Figure 7 is a circuit diagram showing the path of the charging current that flows when charging the liquid crystal display element with a negative voltage source in the circuit of Figure 1. FIG. 8 is a circuit diagram showing another embodiment of this invention, and FIG. 9 is a circuit diagram of a conventional power supply circuit. , FIG. 10 is a circuit diagram showing a configuration example of the voltage follower circuit 3 of FIG. 9, FIG. 11 is a waveform diagram of the output voltage of the circuit of FIG. 9, and FIG. Figure 13 is a circuit diagram showing the path of the charging current that flows when charging the liquid crystal display element by the source, and shows the energy supplied by the positive and negative voltage sources in each period and the energy supplied by the positive and negative voltage sources in each period and in each main part in the circuit of Figure 9. Diagrams to show energy dissipated or stored,
FIG. 14 is a circuit diagram showing the path of the discharge current flowing when discharging the charge of the liquid crystal display element charged by the positive voltage source in the circuit of FIG. 9;
Fig. 15 is a circuit diagram showing the path of the charging current that flows when charging the liquid crystal display element with a negative voltage source in the circuit of Fig. FIG. 3 is a circuit diagram showing a path of a discharge current that flows when discharging the charge of a charged liquid crystal display element.

Claims (1)

[Claims for Utility Model Registration] A positive voltage source whose negative side is connected to a common potential point, a negative voltage source whose positive side is connected to a common potential point, and the respective output voltages of these positive voltage sources and negative voltage sources are A voltage follower circuit that is given as an operating voltage and outputs a voltage intermediate between these positive and negative voltages, and a segment driver that switches each output of the positive voltage source, voltage follower circuit, and negative voltage source and supplies it to the liquid crystal display element. a large-capacity capacitor having one end connected to the output of the positive voltage source or the negative voltage source and the other end connected to the output side of the voltage follower circuit; and the large-capacity capacitor. An initial charging switch or resistor inserted between the other end and the output side of the voltage follower circuit for initially charging the large capacity capacitor; .