System for displaying image and driving method for organic light-emitting element

1 . A system for displaying an image, the system comprising a plurality of pixel structures, each of the pixel structures comprising:

an organic light-emitting element; and

a pixel driving circuit, which drives the organic light-emitting element, is electrically connected with a first scan line and a data line, wherein the pixel driving circuit comprises:

a drive element outputting a current to the organic light-emitting element,

a storage capacitor including a first terminal and a second terminal respectively electrically connected with two terminals of the drive element to control the current outputted from the drive element,

a select switch electrically connected with the first scan line to connect/disconnect the data line and the first terminal of the storage capacitor, and

a data switch electrically connected with the first scan line to connect/disconnect a second scan line and the second terminal of the storage capacitor.

2 . The system according to claim 1 , wherein the second scan line is a previous scan line adjacent to the first scan line.

3 . The system according to claim 1 , wherein the second scan line is a next scan line adjacent to the first scan line.

4 . The system according to claim 1 ,

wherein the select switch and the data switch are transistors;

wherein the select switch comprises a gate electrically connected with the first scan line, a drain electrically connected with the data line and a source electrically connected with the first terminal of the storage capacitor; and

wherein the data switch has a gate electrically connected with the first scan line, a drain electrically connected with the second terminal of the storage capacitor and a source electrically connected with the second scan line.

5 . The system according to claim 1 , wherein the drive element is a transistor having a gate electrically connected with the first terminal of the storage capacitor, a source electrically connected with the second terminal of the storage capacitor and a drain electrically connected with a power source.

6 . The system according to claim 1 , wherein the pixel driving circuit further comprises:

a power switch electrically connected with the first scan line to connect/disconnect a power source and the drive element.

7 . The system according to claim 6 , wherein the power switch is a transistor having a gate electrically connected with the first scan line, a drain electrically connected with the power source and a source electrically connected with the drive element.

8 . The system according to claim 6 , wherein the drive element is an N-type transistor and the power switch is a P-type transistor.

9 . The system according to claim 1 , wherein the select switch, the data switch and the drive element are N-type transistors.

10 . The system according to claim 1 , wherein the pixel structures are arranged in an array.

11 . The system according to claim 1 , further comprising:

a scan driving circuit electrically connected with the first and second scan lines; and

a data driving circuit electrically connected with the data lines, wherein the pixel structures, the scan driving circuit and the data driving circuit constitute an organic light-emitting panel.

12 . The system according to claim 11 , further comprising:

an electronic device including the organic light-emitting panel and an input unit, the input unit being coupled with the organic light-emitting panel and providing an input to the organic light-emitting panel to make the organic light-emitting panel display the image.

13 . The system according to claim 12 , wherein the electronic device is a mobile phone, a digital camera, a personal digital assistant, a notebook computer, a desktop computer, a television, a vehicle display or a portable DVD drive.

14 . A driving method being used in a pixel driving circuit, which drives an organic light-emitting element, is electrically connected with a first scan line and a data line, and comprises a drive element and a storage capacitor, the method comprising the steps of:

controlling a data signal to be written into the storage capacitor from the data line when a signal on the first scan line is enabled, so as to set a voltage at a first terminal of the storage capacitor;

controlling a second scan line to set a voltage at a second terminal of the storage capacitor when the signal on the first scan line is enabled; and

controlling the drive element to output a current to the organic light-emitting element according to a voltage difference between the first terminal and the second terminal of the storage capacitor to drive the organic light-emitting element to emit light.

15 . The method according to claim 14 , wherein a signal on the second scan line is disabled when the signal on the first scan line is enabled.

16 . The method according to claim 14 , wherein the second scan line is a previous scan line adjacent to the first scan line.

17 . The method according to claim 14 , wherein the second scan line is a next scan line adjacent to the first scan line.

18 . The method according to claim 14 , further comprising the steps of:

isolating a power source from the drive element when the first scan line is enabled; and

connecting the power source with the drive element when the first scan line is disabled.