Display device and electronic apparatus
View Patent ↗According to an aspect, a display device includes: a display section that has a first period to consume predetermined power and a second period to consume less power than in the first period, and power consumption of which periodically changes by repeating the first period and the second period; a smoothing capacitor that stabilizes power supplied to the display section; and a power consumption unit that consumes the supplied power in the second period.
1. A display device comprising:
a display section that has a first period to consume predetermined power and a second period to consume less power than in the first period, and power consumption of which periodically changes by repeating the first period and the second period;
a smoothing capacitor that stabilizes power supplied to the display section; and
a power consumption unit that consume the supplied power in the second period,
wherein
the power consumption unit includes a plurality of switching elements that operate in the first period and that also operate in the second period to consume the supplied power,
each of the switching elements includes a first transistor element and a second transistor element,
sources of the first transistor element and the second transistor element included in each switching element are coupled to each other and drains thereof are coupled to each other,
one of the source and the drain of each of the first and second transistor elements included in a first switching element is coupled to a signal line coupled to the display section, and other of the source and the drain of each of the first and second transistor elements is coupled to a signal line provided in common with the first and second transistor elements included in a second switching element,
the first and second transistor elements are controlled to be turned ON and OFF in predetermined cycles, respectively, to bring at least one of the first and second transistor elements in an ON state in any timing in the second period,
the predetermined cycles are set according to power consumption of the display section in the first period, and
the power consumption unit is controlled to match timing of a transition of any one of the first and second transistor elements included in the first switching element from OFF to ON with timing of a transition of any one of the first and second transistor elements included in the second switching element from ON to OFF.
2. The display device according to claim 1 , wherein the power consumption unit is controlled to set some of the first and second transistor elements of the switching elements included therein to be always in ON states in the second period.
3. The display device according to claim 1 , wherein each switching element is provided to correspond to one of plural kinds of color signals included in a video signal corresponding to an image to be displayed on the display section, respectively.
4. An electronic apparatus including a display device, the display device comprising:
a display section that has a first period to consume predetermined power and a second period to consume less power than in the first period, and power consumption of which periodically changes by repeating the first period and the second period;
a smoothing capacitor that stabilizes power supplied to the display section; and
a power consumption unit that consume the supplied power in the second period,
wherein
the power consumption unit includes a plurality of switching elements that operate in the first period and that also operate in the second period to consume the supplied power,
each of the switching elements includes a first transistor element and a second transistor element,
sources of the first transistor element and the second transistor element included in each switching element are coupled to each other and drains thereof are coupled to each other,
one of the source and the drain of each of the first and second transistor elements included in a first switching element is coupled to a signal line coupled to the display section, and other of the source and the drain of each of the first and second transistor elements is coupled to a signal line provided in common with the first and second transistor elements included in a second switching element,
the first and second transistor elements are controlled to be turned ON and OFF in predetermined cycles, respectively, to bring at least one of the first and second transistor elements in an ON state in any timing in the second period,
the predetermined cycles are set according to power consumption of the display section in the first period, and
the power consumption unit is controlled to match timing of a transition of any one of the first and second transistor elements included in the first switching element from OFF to ON with timing of a transition of any one of the first and second transistor elements included in the second switching element from ON to OFF.