Display device, method for driving the same, and electronic device
View Patent ↗A display device including a display unit including first and second lines, light emitting elements and pixel circuits; a first drive unit sequentially applying a selection pulse to the first lines; and a second drive unit applying a signal pulse including first to third voltages to each of the second lines. Each of the pixel circuits includes a first transistor sampling the signal pulse, and a second transistor driving one of the light emitting elements. The first drive unit applies the selection pulse when the first voltage is being applied by the second drive unit, before a correction of a threshold voltage of the second transistor is initiated and within a period that the one of the light emitting elements is being turned out, and the first drive unit applies the selection pulse when the second voltage is being applied by the second drive unit.
1. A display device comprising a display unit including:
a plurality of light emitting elements; and
a plurality of respective pixel circuits, each of the pixel circuits including a first transistor configured to sample a signal voltage and a second transistor configured to drive the light emitting element in response to the signal voltage,
wherein, each of the pixel circuits is driven such that
(a) a first voltage, a second voltage, and a third voltage are sequentially supplied to a control electrode of the second transistor,
(b) the first voltage is higher than the second voltage and the third voltage is a voltage corresponding to the video signal, and
(c) the first voltage is supplied before a correction of a threshold voltage of the second transistor is initiated and within a period in which the light emitting element is turned off, and
(d) a difference between the first voltage and the second voltage is large enough to reduce a probability of occurrence of black dots on the display unit.
2. The display device of claim 1 , wherein a selection pulse is applied to the first transistor while the first voltage is applied to the second transistor, before a correction of a threshold voltage of the second transistor is initiated and within a period in which the corresponding light emitting element is turned off.
3. The display device of claim 1 , wherein, a selection pulse is applied to the first transistor while the second voltage is being applied to second transistor.
4. An electronic device including the display device of claim 1 .
5. The electronic device of claim 4 , wherein the electronic device is selected from the group consisting of a television device, a digital camera, a notebook-sized personal computer, a video camera, and a cellular phone.
6. A display device comprising a display unit that comprises:
a plurality of light emitting elements; and
a plurality of respective pixel circuits, each of the pixel circuits including a first transistor configured to sample a signal voltage and a second transistor configured to drive the light emitting element in response to the signal voltage,
wherein, each of the pixel circuits is driven such that
(a) a first voltage, a second voltage, and a third voltage are sequentially supplied from a drive circuit to a control electrode of the second transistor via a signal line,
(b) the first voltage is greater than the second voltage,
(c) the first voltage is supplied via the signal line before a correction period of a threshold voltage of the second transistor is initiated and within a period in which the light emitting element is turned off, and
(d) the second voltage is supplied via the signal line during the correction period.
7. The display device of claim 6 , wherein a difference between the first voltage and the second voltage is large enough to reduce a probability of occurrence of black dots on the display unit.
8. The display device of claim 6 , wherein a selection pulse is applied to the first transistor while the first voltage is applied to the second transistor, before a correction of a threshold voltage of the second transistor is initiated and within a period in which the corresponding light emitting element is turned off.
9. The display device of claim 6 , wherein, a selection pulse is applied to the first transistor while the second voltage is being applied to the second transistor.
10. An electronic device including the display device of claim 6 .
11. The electronic device of claim 10 , wherein the electronic device is selected from the group consisting of a television device, a digital camera, a notebook-sized personal computer, a video camera, and a cellular phone.