Image display apparatus
According to one embodiment, an image display apparatus includes a plurality of pixels. Each pixel has a light emitting device; a drive transistor electrically connected to the light emitting device; and a capacitor electrically connected to the drive transistor. A ratio of an area occupied by the drive transistor per one pixel to an area of the one pixel is equal to or more than 0.05.
1. An image display apparatus, comprising:
a plurality of pixels, each pixel having
a light emitting device,
a drive transistor electrically connected to the light emitting device,
a capacitor that has a first electrode and a second electrode, the first electrode being electrically connected to a gate electrode of the drive transistor and the second electrode being electrically connected to a data line for supplying a brightness potential, and
a driving controller configured to control a potential difference to both ends of the light emitting device being equal to or more than a first threshold voltage of the light emitting device at which current starts to flow through the light emitting device, and equal to or less than a second threshold voltage of the light emitting device at which light emission is started in the light emitting device when a potential applied to the gate electrode of the driver transistor for previous light emission is reset,
wherein the driving controller comprises at least one of a data line drive circuit, a first power supply circuit, a second power supply circuit, a drive control circuit, and a scan line drive circuit, and
wherein a ratio of an area occupied by the drive transistor per one pixel to an area of the one pixel is equal to or more than 0.05.
2. The image display apparatus according to claim 1 , wherein the ratio is equal to or less than 0 25.
3. The image display apparatus according to claim 1 , wherein each pixel has another transistor other than the drive transistor, and a ratio of an area of the drive transistor to an area of the another transistor is 2 to 10.
4. The image display apparatus according to claim 1 , wherein a ratio of an area occupied by the capacitor per one pixel to an area of the one pixel is equal to or more than 0.05.
5. The image display apparatus according to claim 4 , wherein the ratio of an area occupied by the capacitor per one pixel to an area of the one pixel is equal to or less than 0.25.
6. The image display apparatus according to claim 1 , wherein the drive transistor is an amorphous silicon transistor.
7. The image display apparatus according to claim 1 , wherein an area of the one pixel is 7000 μm 2 to 50000 μm 2 .
8. The image display apparatus according to claim 1 , wherein the light emitting device is an organic EL device.
9. The image display apparatus according to claim 1 , wherein a number of transistors included in each pixel is three.
10. An image display apparatus, comprising:
a plurality of pixels, each pixel having
a light emitting device,
a drive transistor electrically connected to the light emitting device,
a capacitor that has a first electrode and a second electrode, the first electrode being electrically connected to a gate electrode of the drive transistor and the second electrode being electrically connected to a data line for supplying a brightness potential, the drive transistor and the capacitor not overlapping, and
a driving controller configured to control a potential difference to both ends of the light emitting device being equal to or more than a first threshold voltage of the light emitting device at which current starts to flow through the light emitting device, and equal to or less than a second threshold voltage of the light emitting device at which light emission is started in the light emitting device when a potential applied to the gate electrode of the driver transistor for previous light emission is reset,
wherein the driving controller comprises at least one of a data line drive circuit, a first power supply circuit, a second power supply circuit, drive control circuit, and a scan line drive circuit, and
wherein a ratio of an area occupied by the capacitor per one pixel to an area of the one pixel is equal to or more than 0.05.
11. The image display apparatus according to claim 10 , wherein the ratio is equal to or less than 0.25.
12. The image display apparatus according to claim 10 , wherein the drive transistor and the capacitor are located on a substantially same plane.
13. The image display apparatus according to claim 10 , wherein the drive transistor is an amorphous silicon transistor.
14. The image display apparatus according to claim 10 , wherein an area of the one pixel is 7000 μm 2 to 50000 μm 2 .
15. The image display apparatus according to claim 10 , wherein the light emitting device is an organic EL device.
16. The image display apparatus according to claim 10 , wherein a number of transistors included in each pixel is three.
17. An image display apparatus, comprising:
a plurality of pixels, each pixel having
a light emitting device,
a drive transistor electrically connected to the light emitting device,
a capacitor electrically connected to the drive transistor, and
a driving controller that controls a potential difference to both ends of the light emitting device being equal to or more than a first threshold voltage of the light emitting device at which current starts to flow through the light emitting device, and equal to or less than a second threshold voltage of the light emitting device at which light emission is started in the light emitting device when a potential applied to the gate electrode of the driver transistor for previous light emission is reset,
wherein the driving controller comprises at least one of a data line drive circuit, a first power supply circuit, a second power supply circuit, drive control circuit, and a scan line drive circuit.
18. The image display apparatus according to claim 17 , further comprising:
a first switching transistor that electrically connects the gate electrode of the drive transistor and either a source electrode or the drain electrode of the drive transistor according to a scan signal.
19. The image display apparatus according to claim 17 , wherein the drive transistor is set OFF when the potential applied to the gate electrode of the driver transistor for previous light emission is reset.
20. The image display apparatus according to claim 17 , wherein the drive transistor and the capacitor are not overlapped.