THERMAL MANAGEMENT OF OLED DEVICES
First Claim
Patent Images
1. An organic light-emitting diode (OLED) device, comprising:
- an OLED including an organic layer arranged between first and second electrodes;
a substrate supporting one side of the OLED;
a cover layer at an opposite side of the OLED; and
a thermal junction between the OLED and the cover layer having a thermal resistance of 0.2 m2·
K/W or less.
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Abstract
An electrically powered light source can be constructed with an electroluminescent element operating essentially at room temperature while providing a useful amount of light. A thermal junction located between an OLED and a cover layer of an OLED device is configured to advantageously manage the steady-state temperature of the OLED. The thermal junction may be formed with a thermal resistance of 0.2 m2·K/W or less. A distance across the junction may be 2 mm or less, and/or the junction may include a layer of material having a thermal conductivity of 0.1 W/m·K or greater.
15 Citations
24 Claims
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1. An organic light-emitting diode (OLED) device, comprising:
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an OLED including an organic layer arranged between first and second electrodes; a substrate supporting one side of the OLED; a cover layer at an opposite side of the OLED; and a thermal junction between the OLED and the cover layer having a thermal resistance of 0.2 m2·
K/W or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An organic light-emitting diode (OLED) device, comprising:
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an OLED including an organic layer arranged between first and second electrodes; a substrate supporting one side of the OLED; a cover layer at an opposite side of the OLED; and a thermal junction between the OLED and the cover layer, the thermal junction being sized so that the OLED reaches a steady-state temperature within 10°
C. of an ambient temperature at a luminance of 3000 cd/m2. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method of making an OLED device, comprising the steps of:
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(a) forming an OLED on a substrate; and (b) disposing a cover layer over the substrate to form a thermal junction between opposing surfaces of the OLED and the cover layer, the thermal junction having a thermal resistance of 0.2 m2·
K/W or less. - View Dependent Claims (21, 22, 23)
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24. An electrically powered 3000 cd/m2 light source comprising an encapsulated electroluminescent element that operates at a steady-state temperature within 1°
- C. of an ambient temperature.
Specification