Light emitting device
View Patent ↗While suppressing the frequency of a signal line driver circuit, a blur of a moving image of a light-emitting device using a light-emitting transistor can be prevented, without reducing a frame frequency. A switching element is provided in a path of a current which flows between a source and a drain of a light-emitting transistor, and the light-emitting transistor is made not to emit light by turning off the switching element, whereby pseudo-impulse driving is performed. Switching of the switching element can be controlled by a scan line driver circuit. In a specific structural example, the light-emitting device includes, in a pixel, a light-emitting transistor, a first switching element which controls supply of a potential of a video signal to a gate of the light-emitting transistor, and a second switching element which controls a current which flows between a source and a drain of the light-emitting transistor.
1. A light-emitting device comprising: a pixel including a light-emitting transistor, a first switching element and a second switching element; wherein the light-emitting transistor, the first switching element, and the second switching element are within the pixel; and wherein the first switching element is configured to control supply of a video signal to a gate of the light-emitting transistor; and wherein the second switching element is configured to control a current flowing between a source and a drain of the light-emitting transistor.
2. The light-emitting device according to claim 1 , further comprising a signal line and a power supply line;
wherein the pixel includes both the signal line and the power supply line;
wherein the signal line is configured to supply the video signal to the light-emitting transistor through the first switching element; and
wherein the power supply line is configured to supply the current to the light-emitting transistor.
3. The light-emitting device according to claim 1 , further comprising a signal line and a power supply line;
wherein the pixel includes both the signal line and the power supply line;
wherein the signal line is electrically connected to the first switching element;
wherein the first switching element is electrically connected to the gate of the light-emitting transistor;
wherein the second switching element is electrically connected to one of the source and the drain of the light-emitting transistor; and
wherein the power supply line is electrically connected to the second switching element or the other of the source and the drain of the light-emitting transistor.
4. A light-emitting device comprising: a pixel including a light-emitting transistor, a first switching element and a second switching element; wherein the light-emitting transistor, the first switching element, and the second switching element are within the pixel; and wherein the first switching element is configured to control supply of a video signal to a gate of the light-emitting transistor; and wherein the second switching element is configured to control electrical connection between the gate and a source of the light-emitting transistor.
5. The light-emitting device according to claim 4 , further comprising a signal line and a power supply line;
wherein the pixel includes both the signal line and the power supply line;
wherein the signal line is configured to supply the video signal to the light-emitting transistor through the first switching element; and
wherein the power supply line is configured to supply a current to the light-emitting transistor.
6. The light-emitting device according to claim 4 , further comprising a signal line and a power supply line;
wherein the pixel includes both the signal line and the power supply line;
wherein the signal line is electrically connected to the first switching element;
wherein the first switching element is electrically connected to the gate of the light-emitting transistor;
wherein the second switching element is electrically connected to the source of the light-emitting transistor; and
wherein the power supply line is electrically connected to the second switching element or a drain of the light-emitting transistor.