Voltage selection circuit, electrophoretic display apparatus, and electronic device
View Patent ↗Provided is a voltage selection circuit for outputting a potential selected from a plurality of input potentials, the voltage selection circuit capable of selectively outputting a first high-level potential being a highest potential, a second high-level potential, or a third high-level potential being a lowest potential from an output terminal thereof. The voltage selection circuit includes a first switching circuit that supplies the first high-level potential to the output terminal, a second switching circuit that supplies the second high-level potential to the output terminal, and a third switching circuit that supplies the third high-level potential to the output terminal. The first switching circuit includes a high-voltage transistor and a level shifter connected to a gate terminal of the high-voltage transistor. The second switching circuit includes a first low-voltage transistor, a level shifter connected to a gate terminal of the first low-voltage transistor, and a diode disposed between the first low-voltage transistor and the output terminal. The third switching circuit includes a second low-voltage transistor and a diode disposed between the second low-voltage transistor and the output terminal.
1. A voltage selection circuit for outputting a potential selected from a plurality of input potentials, the voltage selection circuit capable of selectively outputting a first high-level potential being a highest potential, a second high-level potential, or a third high-level potential being a lowest potential from an output terminal thereof, the voltage selection circuit comprising:
a first switching circuit that supplies the first high-level potential to the output terminal;
a second switching circuit that supplies the second high-level potential to the output terminal; and
a third switching circuit that supplies the third high-level potential to the output terminal,
wherein the first switching circuit includes a high-voltage transistor and a first level shifter connected to a first gate terminal of the high-voltage transistor,
wherein the second switching circuit includes a first low-voltage transistor, a second level shifter connected to a second gate terminal of the first low-voltage transistor, and a first diode disposed between the first low-voltage transistor and the output terminal, and
wherein the third switching circuit includes a second low-voltage transistor and a second diode disposed between the second low-voltage transistor and the output terminal.
2. The voltage selection circuit according to claim 1 , wherein the second level shifter includes a third low-voltage transistor.
3. An electrophoretic display apparatus comprising:
two substrates;
an electrophoretic element containing an electrophoretic particle and being sandwiched between the two substrates; and
a display portion including a plurality of pixels,
wherein each of the plurality of pixels includes a pixel electrode, a pixel switching element, and a latch circuit connected between the pixel electrode and the pixel switching element, and
wherein at least a power supply voltage of the latch circuit is supplied from the voltage selection circuit according to claim 1 .
4. The electrophoretic display apparatus according to claim 3 , wherein the third high-level potential is a voltage of a battery in a power supply system of the electrophoretic display apparatus.
5. An electronic device comprising the electrophoretic display apparatus according to claim 3 .
6. An electrophoretic display apparatus comprising:
two substrates;
an electrophoretic element containing an electrophoretic particle and being sandwiched between the two substrates; and
a display portion including a plurality of pixels,
wherein each of the plurality of pixels includes a pixel electrode, a pixel switching element, and a latch circuit connected between the pixel electrode and the pixel switching element, and
wherein at least a power supply voltage of the latch circuit is supplied from a voltage selection circuit for outputting a potential selected from a plurality of input potentials to an output terminal, the voltage selection circuit capable of selectively outputting a first high-level potential being a highest potential, a second high-level potential, or a third high-level potential being a lowest potential from an output terminal thereof, the voltage selection circuit including:
a first switching circuit that supplies the first high-level potential to the output terminal;
a second switching circuit that supplies the second high-level potential to the output terminal; and
a third switching circuit that supplies the third high-level potential to the output terminal,
wherein the first switching circuit includes a high-voltage transistor and a first level shifter connected to a first gate terminal of the high-voltage transistor,
wherein the second switching circuit includes a first low-voltage transistor, a second level shifter connected to a second gate terminal of the first low-voltage transistor, and a first diode disposed between the first low-voltage transistor and the output terminal, and
wherein the third switching circuit includes a second low-voltage transistor and a second diode disposed between the second low-voltage transistor and the output terminal.