Light emitting device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorTakeshi Fukunaga
Life of this patent
Estimating the term…
Abstract
In order to emit light from the upper side of a substrate, for example, a treatment is required such that a cathode is thinned. Generally, when light produced in a light emitting layer is passed through the electrode, brightness of a light emitting device is decreased. In the light emitting device of the present invention, as shown in FIG. 4, an anode and a cathode are located so as to produce an electric field in a direction parallel with the surface of a substrate. Thus, light produced in the light emitting layer is emitted from the lower side or the upper side of the substrate without passing through the electrode.
Claims22
(canceled)
A camera comprising:
- a display portion, the display portion comprising:
- a substrate;
- a source wiring over the substrate;
- a gate wiring over the substrate;
- at least one thin film transistor provided in an intersection of the source wiring and the gate wiring;
- an insulator over the thin film transistor;
- a first electrode formed on the insulator;
- a second electrode formed on the insulator so as not to be in contact with the first electrode;
- and
- a light emitting layer formed between the first and second electrodes on the insulator,
- wherein the first and second electrodes are formed directly on the insulator, and
- wherein the thin film transistor is electrically connected to the first electrode.
A portable telephone comprising:
- a display portion, the display portion comprising:
- a substrate;
- a source wiring over the substrate;
- a gate wiring over the substrate;
- at least one thin film transistor provided in an intersection of the source wiring and the gate wiring;
- an insulator over the thin film transistor;
- a first electrode formed on the insulator;
- a second electrode formed on the insulator so as not to be in contact with the first electrode;
- and
- a light emitting layer formed between the first and second electrodes on the insulator,
- wherein the first and second electrodes are formed directly on the insulator, and
- wherein the thin film transistor is electrically connected to the first electrode.
A computer comprising:
- a display portion, the display portion comprising:
- a substrate;
- a source wiring over the substrate;
- a gate wiring over the substrate;
- at least one thin film transistor provided in an intersection of the source wiring and the gate wiring;
- an insulator over the thin film transistor;
- a first electrode formed on the insulator;
- a second electrode formed on the insulator so as not to be in contact with the first electrode;
- and
- a light emitting layer formed between the first and second electrodes on the insulator,
- wherein the first and second electrodes are formed directly on the insulator, and
- wherein the thin film transistor is electrically connected to the first electrode.
Dependencies are inferred from the claim text.