초록 ▼

The invention provides a light emitting device which can suppress the reduction of luminance in accordance with the light emission time and light emission at a high luminance. Moreover, the invention relates to a driving method which can suppress the reduction of luminance in accordance with the lig

The invention provides a light emitting device which can suppress the reduction of luminance in accordance with the light emission time and light emission at a high luminance. Moreover, the invention relates to a driving method which can suppress the reduction of luminance in accordance with the light emission time and light emission at a high luminance. The light emitting device of the invention can display a plurality of colors of which brightness and chromaticity are different by visually mixing light emission of a plurality of light emitting elements of which light emission colors are different. When a visually mixed display color is formed, a white light emission is exhibited.

대표청구항 ▼

The invention claimed is: 1. A driving method of a light emitting device comprising: applying a video signal from a source signal line to a first transistor and a second transistor through a switching transistor; generating a first potential difference between a first electrode and a second electro

The invention claimed is: 1. A driving method of a light emitting device comprising: applying a video signal from a source signal line to a first transistor and a second transistor through a switching transistor; generating a first potential difference between a first electrode and a second electrode of a first light emitting element, wherein the first electrode of the first light emitting element is connected to a first current supply line, and the second electrode of the first light emitting element is connected to a second current supply line; generating a second potential difference between a first electrode and a second electrode of a second light emitting element, wherein the first electrode of the second light emitting element is connected to the second current supply line, and the second electrode of the second light emitting element is connected to a third current supply line; sequentially making the first light emitting element connected to the first transistor emit light based on the video signal and the first potential difference; and sequentially making the second light emitting element connected to the second transistor emit light based on the video signal and the second potential difference, wherein the first light emitting element and the second light emitting element emit light so that mixed light by the first and the second light emitting element becomes visually white. 2. The driving method of a light emitting device according to claim 1, wherein the first light emitting element and the second light emitting element are laminated. 3. A driving method of a light emitting device comprising: applying a video signal from a source signal line to a first transistor and a second transistor through a switching transistor; generating a first potential difference between a first electrode and a second electrode of a first light emitting element, wherein the first electrode of the first light emitting element is connected to a first current supply line, and the second electrode of the first light emitting element is connected to a second current supply line; generating a second potential difference between a first electrode and a second electrode of a second light emitting element, wherein the first electrode of the second light emitting element is connected to the second current supply line, and the second electrode of the second light emitting element is connected to a third current supply line; sequentially making the first light emitting element connected to the first transistor emit light based on the video signal and the first potential difference; and sequentially making the second light emitting element connected to the second transistor emit light based on the video signal and the second potential difference, wherein the first light emitting element emits white light. 4. The driving method of a light emitting device according to claim 3, wherein the second light emitting element emits light emission color which is different from the first light emitting element. 5. The driving method of a light emitting device according to claim 3, wherein the first light emitting element and the second light emitting element are laminated. 6. A light emitting device comprising: a source signal line; a first current supply line; a second current supply line; a first transistor; a second transistor; a first light emitting element; and a second light emitting element, wherein a gate electrode of the first transistor and a gate electrode of the second transistor are electrically connected to the source signal line through a switching transistor, wherein a first electrode of the first transistor is electrically connected to the first current supply line, and a second electrode of the first transistor is directly connected to a first electrode of the first light emitting element, wherein a first electrode of the second transistor is electrically connected to the second current supply line, and a second electrode of the second transistor is directly connected to a second electrode of the first light emitting element and an electrode of the second light emitting element, wherein the first light emitting element and the second light emitting element are connected in series, and wherein the first light emitting element emits white light. 7. The light emitting device according to claim 6, wherein the second light emitting element emits light emission color which is different from the first light emitting element. 8. The light emitting device according to claim 6, wherein the first light emitting element and the second light emitting element are laminated. 9. The light emitting device according to claim 6, wherein the gate electrode of the first transistor and the gate electrode of the second transistor are electrically connected to each other. 10. The light emitting device according to claim 6, further comprising: a switching transistor, wherein the switching transistor is electrically connected to the gate electrode of the first transistor and the gate electrode of the second transistor. 11. The light emitting device according to claim 6, further comprising: a capacitor line; and a capacitor between the capacitor line and the gate electrode of the first transistor. 12. The light emitting device according to claim 6, wherein the light emitting device is incorporated into an electronic apparatus selected from the group consisting of a computer such as a desktop computer and a laptop computer, a camera such as a digital camera and a video camera, a television receiver, a navigation system, a mobile phone and a lighting. 13. A light emitting device comprising: a source signal line; a first current supply line; a second current supply line; a first transistor; a second transistor; a first light emitting element; and a second light emitting element, wherein a gate electrode of the first transistor and a gate electrode of the second transistor are electrically connected to the source signal line through a switching transistor, wherein a first electrode of the first transistor is electrically connected to the first current supply line, and a second electrode of the first transistor is directly connected to one electrode of the first light emitting element, wherein a first electrode of the second transistor is electrically connected to the second current supply line, and a second electrode of the second transistor is directly connected to the second electrode of the first light emitting element and an electrode of the second light emitting element, wherein the first light emitting element and the second light emitting element are connected in series, and wherein the first light emitting element and the second light emitting element emit light so that mixed light by the first and the second light emitting element becomes visually white. 14. The light emitting device according to claim 13, wherein the first light emitting element and the second light emitting element are laminated. 15. The light emitting device according to claim 13, wherein the gate electrode of the first transistor and the gate electrode of the second transistor are electrically connected to each other. 16. The light emitting device according to claim 13, further comprising: a switching transistor, wherein the switching transistor is electrically connected to the gate electrode of the first transistor and the gate electrode of the second transistor. 17. The light emitting device according to claim 13, further comprising: a capacitor line; and a capacitor between the capacitor line and the gate electrode of the first transistor. 18. The light emitting device according to claim 13, wherein the light emitting device is incorporated into an electronic apparatus selected from the group consisting of a computer such as a desktop computer and a laptop computer, a camera such as a digital camera and a video camera, a television receiver, a navigation system, a mobile phone and a lighting. 19. A light emitting device comprising: a source signal line; a switching transistor; a first transistor; a second transistor; a third transistor; a first light emitting element connected to the first transistor; a second light emitting element connected to the second transistor; and a third light emitting element connected to the third transistor, wherein a first electrode of the switching transistor is connected to the source signal line and a second electrode of the switching transistor is electrically connected to gate electrodes of the first transistor and the second transistor and the third transistor, wherein a first electrode of the first transistor is electrically connected to the first current supply line, and a second electrode of the first transistor is directly connected to a first electrode of the first light emitting element, wherein a first electrode of the second transistor is electrically connected to the second current supply line, and a second electrode of the second transistor is directly connected to a second electrode of the first light emitting element and one electrode of the second light emitting element, and wherein the first light emitting element emits white light. 20. The light emitting device according to claim 19, wherein the second light emitting element and the third light emitting element emit light emission colors which are different from the first light emitting element. 21. The light emitting device according to claim 19, wherein the first light emitting element, the second light emitting element and the third light emitting element are laminated. 22. The light emitting device according to claim 19, wherein the gate electrodes of the first transistor, the second transistor and the third transistor are electrically connected to each other. 23. The light emitting device according to claim 19, further comprising: a capacitor line; and a capacitor between the capacitor line and the gate electrode of the first transistor. 24. The light emitting device according to claim 19, wherein a first electrode of the first transistor is connected to a first current supply line through the first transistor, a first electrode of the second transistor is connected to a second current supply line through the second transistor and a first electrode of the third transistor is connected to a third current supply line through the third transistor. 25. The light emitting device according to claim 19, wherein the light emitting device is incorporated into an electronic apparatus selected from the group consisting of a computer such as a desktop computer and a laptop computer, a camera such as a digital camera and a video camera, a television receiver, a navigation system, a mobile phone and a lighting. 26. A light emitting device comprising: a source signal line; a switching transistor; a first transistor; a second transistor; a third transistor; a first light emitting element connected to the first transistor; a second light emitting element connected to the second transistor; and a third light emitting element connected to the third transistor, wherein a first electrode of the switching transistor is connected to the source signal line and a second electrode of the switching transistor is electrically connected to gate electrodes of the first transistor and the second transistor and the third transistor, wherein a first electrode of the first transistor is electrically connected to the first current supply line, and a second electrode of the first transistor is directly connected to a first electrode of the first light emitting element, wherein a first electrode of the second transistor is electrically connected to the second current supply line, and a second electrode of the second transistor is directly connected to a second electrode of the first light emitting element and a first electrode of the second light emitting element, and wherein the first light emitting element and the second light emitting element emit light so that mixed light by the first and the second light emitting element becomes visually white. 27. The light emitting device according to claim 26, wherein the first light emitting element, the second light emitting element and the third light emitting element are laminated. 28. The light emitting device according to claim 26, wherein the gate electrodes of the first transistor, the second transistor and the third transistor are electrically connected to each other. 29. The light emitting device according to claim 26, further comprising: a capacitor line; and a capacitor between the capacitor line and the gate electrode of the first transistor. 30. The light emitting device according to claim 26, wherein a first electrode of the first transistor is connected to a first current supply line through the first transistor, a first electrode of the second transistor is connected to a second current supply line through the second transistor and a first electrode of the third transistor is connected to a third current supply line through the third transistor. 31. The light emitting device according to claim 26, wherein the light emitting device is incorporated into an electronic apparatus selected from the group consisting of a computer such as a desktop computer and a laptop computer, a camera such as a digital camera and a video camera, a television receiver, a navigation system, a mobile phone and a lighting.