Organic light-emitting circuit structure having temperature compensation function
An organic light-emitting circuit structure having a temperature function includes an organic light-emitting diode which has an anode and a cathode opposite to each other; a driving transistor including a first electrode and a second electrode; the first electrode is a source electrode, the second electrode is a drain electrode; or, the first electrode is the drain electrode, the second electrode is the source electrode; a temperature sensitive resistor, which is electrically connected between the driving transistor and the light-emitting device or between the driving transistor and the voltage source. The temperature sensitive resistor increases a resistance value at sensing a temperature increase or decreases the resistance value at sensing a temperature decrease. As a result a current through the organic light-emitting diode stays compensated and stable, thereby ensuring that the organic light-emitting diode keeps emitting light normally under various temperature conditions.
1. An organic light-emitting circuit structure having a temperature compensation function, comprising:
an organic light-emitting diode comprising an anode and a cathode opposite to each other;
a driving transistor comprising a first electrode and a second electrode, wherein the first electrode is connected with the anode, the second electrode is connected to a voltage source via a power line, the driving transistor is configured to supply a driving current to the organic light-emitting diode based on voltage provided by the voltage source; and
a temperature sensitive resistor, wherein the temperature sensitive resistor increases a resistance value at sensing a temperature increase or decreases the resistance value at sensing a temperature decrease, wherein a current through the organic light-emitting diode stays compensated and stable; and wherein the first electrode is a source electrode, the second electrode is a drain electrode, or, the first electrode is the drain electrode, the second electrode is the source electrode; and
wherein the power line and the second electrode are electrically connected by the temperature sensitive resistor.
2. The circuit structure according to claim 1 , wherein a planarization layer is provided between the driving transistor and the organic light-emitting diode, the anode and the first electrode are connected through a via hole of the planarization layer.
3. The circuit structure according to claim 1 , wherein an insulation layer is provided between the temperature sensitive resistor and the power line and the second electrode, wherein the insulation layer covers at least a part of the power line and at least a part of the second electrode, wherein an area of the insulation layer covering the power line is provided with at least one opening area, wherein an area of the insulation layer covering the second electrode is provided with at least one opening area, and wherein the temperature sensitive resistor is electrically connected with the power line and second electrode through the opening areas.
4. The circuit structure according to claim 1 , wherein an end of the power line closing to the second electrode comprises a third branch and a fourth branch which are disconnected with each other, wherein the third branch is electrically connected with the second electrode, wherein the fourth branch is electrically connected with the voltage source, and wherein the third branch and the fourth branch are connected by the temperature sensitive resistor.
5. An organic light-emitting circuit structure having a temperature compensation function, comprising:
an organic light-emitting diode comprising: an anode, a cathode, and an organic layer between the anode and the cathode;
a driving transistor comprising a first electrode and a second electrode, wherein the first electrode is connected with the anode, the second electrode is connected to a voltage source via a power line, the driving transistor is configured to supply a driving current to the organic light-emitting diode based on voltage provided by the voltage source; and
a temperature sensitive resistor, wherein the temperature sensitive resistor increases a resistance value at sensing a temperature increase or decreases the resistance value at sensing a temperature decrease, wherein a current through the organic light-emitting diode stays compensated and stable; and wherein the first electrode is a source electrode, the second electrode is a drain electrode, or, the first electrode is the drain electrode, the second electrode is the source electrode;
wherein the organic layer comprises: an organic light-emitting layer between the anode and the cathode, an electron injection layer between the organic light-emitting layer and the cathode, a hole injection layer between the organic light-emitting layer and the anode; an electron transport layer between the electron injection layer and the organic light-emitting layer, and a hole transport layer between the hole injection layer and the organic light-emitting layer;
wherein the temperature sensitive resistor is disposed between the anode and the hole injection layer and at least partially electrically connected with the anode and the hole injection layer, and wherein the temperature sensitive resistor covers the anode, and is in accordance with a pattern of the anode.
6. The circuit structure according to claim 5 , wherein a planarization layer is provided between the driving transistor and the organic light-emitting diode, the anode and the first electrode are connected through a via hole of the planarization layer.