Display device
A display device includes a display area including a plurality of pixels arrayed next to one another in a first direction and in a second direction that is different from the first direction, and a control circuit, wherein each of the pixels includes a light-emitting element configured to emit light by a current flowing therethrough, a drive transistor, a shut-off transistor, and a holding capacitance.
1. A display device comprising:
a light-emitting element,
a drive transistor coupled to the light-emitting element, a gate of the drive transistor is configured to receive an initialization voltage and a video voltage, and
a shut-off circuit, coupled to the drive transistor, configured to supply or shut off a power voltage to the drive transistor,
wherein,
the shut-off circuit is configured to supply the power voltage to the drive transistor while the initialization voltage is written into the gate of the drive transistor, and then shut off the power voltage while the video voltage is written into the drive transistor, and then supply the power voltage in an emission-enabled period at a black insertion rate which is a ratio of a period in which the power voltage is shut off to a period of the emission-enabled period,
a luminance set value corresponds to the black insertion rate and a voltage difference between the initialization voltage and the video voltage,
as the luminance set value gets lower, the black insertion rate and the initialization voltage get higher,
a gate-source voltage corresponds to the luminance set value, and
the black insertion rate is based on the initialization voltage and the luminance set value, such that a difference in black insertion rate increases relative to a difference in the initialization voltage, as the luminance set value gets lower, and as the initialization voltage gets higher.
2. The display device according to claim 1 , further comprising:
a control circuit configured to control the shut-off circuit.
3. The display device according to claim 2 , wherein the control circuit includes a storage circuit configured to store therein initialization voltage information that has defined correspondence relations between a first initialization voltage and a second initialization voltage and a first luminance set value and a second luminance set value.
4. The display device according to claim 1 , wherein a display area comprises:
a plurality of first signal lines configured to supply the video voltage to the gates of the drive transistors of the pixels that are arrayed next to one another in a second direction; and
a plurality of second signal lines configured to supply the initialization voltage and a second initialization voltage to the gates of the drive transistors of the pixels that are arrayed next to one another in the second direction.
5. The display device according to claim 1 , wherein a display area comprises a plurality of first signal lines configured to supply, to the gates of the drive transistors of the pixels that are arrayed next to one another in the second direction, the video voltage and the initialization voltage and a second initialization voltage in a time-divisional manner within each horizontal scan period.
6. The display device according to claim 1 , wherein the shut-off circuit is configured to supply or shut off an initialization current to the drive transistor in response to the luminance set value, which is configured to be set at different values.