Display apparatus, driving method thereof, and electronic system
View Patent ↗A display apparatus includes: a pixel array section including a row of scanning lines, a column of signal lines, and pixels in a matrix, each of the pixels disposed at an intersection of both of the lines; and a drive section. The drive section performs line progressive scanning on the pixels. The pixel includes a light emitting device, a sampling transistor, a driving transistor, a switching transistor, and a holding capacitor. The sampling transistor samples a video signal in the holding capacitor, the driving transistor changes the device to a luminous state, the switching transistor becomes ON in advance of the sampling of the video signal to change the light emitting device to a non-luminous state, and the sampling transistor takes in the OFF voltage from the signal line to the driving transistor, thereby preventing a penetration current from flowing from the power source toward the fixed potential.
1. A display apparatus, comprising:
a pixel array section including first scanning lines, second scanning lines, signal lines, and pixels in a matrix; and
a drive section configured to output a first control signal and a second control signal to the first scanning lines and the second scanning lines, respectively,
at least one of the pixels comprising a light emitting device, a first transistor, a second transistor, a third transistor, and a holding capacitor,
the first transistor having a control terminal connected to one of the first scanning lines, a first current terminal connected to one of the signal lines, and a second current terminal connected to a control terminal of the second transistor,
the second transistor having a first current terminal connected to a power source and a second current terminal connected to the light emitting device,
the third transistor having a control terminal connected to one of the second scanning lines, a first current terminal connected to a fixed potential, and a second current terminal connected to the second current terminal of the second transistor, and
the second transistor being configured to supply drive current to the light emitting device to change the light emitting device to a luminous state, wherein
the third transistor becomes ON in accordance with the second control signal supplied from the one of the second scanning lines to apply the fixed potential to an anode electrode of the light emitting device,
the first transistor becomes ON in accordance with the first control signal supplied from the one of the first scanning lines to apply the predetermined potential to the control terminal of the second transistor, and
the fixed potential is lower than a potential applied to a cathode electrode.
2. The display apparatus according to claim 1 , wherein the first transistor becomes ON in accordance with the first control signal supplied from the one of the first scanning lines after the third transistor becomes ON.
3. The display apparatus according to claim 1 , wherein
the first transistor is configured to set a potential difference between first and second terminals of the holding capacitor to be higher than a threshold voltage of the driving transistor, and subsequently, the first transistor is configured to turn off the third transistor, and to charge the holding capacitor until a driving capacitor is cut off, and to hold a voltage corresponding to the threshold voltage in the holding capacitor.
4. The display apparatus according to claim 1 , wherein the second transistor is configured to negatively feedback drive current flowing through the second transistor to the holding capacitor for a predetermined correction time period in a state where a signal potential is applied to the control terminal of the second transistor, and to apply a correction corresponding to a mobility of the second transistor to the signal potential held by the holding capacitor.
5. An electronic apparatus comprising the display apparatus according to claim 1 .
6. The electronic apparatus according to claim 5 , wherein the first transistor becomes ON in accordance with the first control signal supplied from the one of the first scanning lines after the third transistor becomes ON.
7. The electronic apparatus according to claim 5 , wherein
the first transistor is configured to set a potential difference between first and second terminals of the holding capacitor to be higher than a threshold voltage of the driving transistor, and subsequently, the first transistor is configured to turn off the third transistor, and to charge the holding capacitor until a driving capacitor is cut off, and to hold a voltage corresponding to the threshold voltage in the holding capacitor.
8. The electronic apparatus according to claim 5 , wherein the second transistor is configured to negatively feedback drive current flowing through the second transistor to the holding capacitor for a predetermined correction time period in a state where a signal potential is applied to the control terminal of the second transistor, and to apply a correction corresponding to a mobility of the second transistor to the signal potential held by the holding capacitor.