Micro electro mechanical system controlled organic LED and pixel arrays and method of using and of manufacturing same
First Claim
1. A light emitting element comprising:
- an organic light emitting device comprising an anode, a cathode, and an organic light emitting material disposed between the anode and the cathode; and
a micro electromechanical system coupled to the organic light emitting device such that actuation of the micro electromechanical system activates the organic light emitting device to produce light;
wherein the micro electromechanical system comprises a first conductive layer, a second conductive layer, and an actuating member sandwiched between the first conductive layer and the second conductive layer;
the micro electromechanical system forms a cantilever extending over the cathode of the organic light emitting device and is spaced apart therefrom when the micro electromechanical system is in an unactuated state; and
the micro electromechanical system is actuated by a voltage applied across the anode and the first conductive layer.
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Abstract
Organic light emitting devices are disclosed that use a micro electromechanical system (MEMS) structure to enable a pixel and pixel array wherein each pixel contains a MEMS and an OLED element. A MEMS structure is used for switching the OLED element. These OLED/MEMS pixels can be fabricated on flex circuit, silicon, as well as other inorganic materials. They can be fabricated in a large array for developing a 2-dimensional display application and each pixel can be addressed through conventional matrix scanning addressing scheme. The ability of fabricating these OLED/MEMS pixels on flexible organic substrates as well as other rigid substrates enables wider selection of substrate materials for use with different applications.
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Citations
20 Claims
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1. A light emitting element comprising:
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an organic light emitting device comprising an anode, a cathode, and an organic light emitting material disposed between the anode and the cathode; and
a micro electromechanical system coupled to the organic light emitting device such that actuation of the micro electromechanical system activates the organic light emitting device to produce light;
wherein the micro electromechanical system comprises a first conductive layer, a second conductive layer, and an actuating member sandwiched between the first conductive layer and the second conductive layer;
the micro electromechanical system forms a cantilever extending over the cathode of the organic light emitting device and is spaced apart therefrom when the micro electromechanical system is in an unactuated state; and
the micro electromechanical system is actuated by a voltage applied across the anode and the first conductive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of manufacturing a light emitting element comprising the steps of:
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forming an organic light emitting device by disposing an organic light emitting material between an anode and a cathode; and
forming a micro electromechanical system which is coupled to the organic light emitting device such that an electrical actuation of the micro electromechanical system activates the organic light emitting device to produce light;
said forming the micro electromechanical system comprising;
forming a cantilever that comprises an actuating member sandwiched between a first conductive layer and a second conductive layer; and
disposing the cantilever over the cathode of the organic light emitting device such that upon the electrical actuation of the micro electromechanical system, one of the conductive layers of the cantilever makes an electrical contact with an electrode of the organic light emitting device. - View Dependent Claims (16, 17, 18, 19)
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20. A light emitting element comprising:
an organic light emitting device comprising an organic light emitting material disposed between an anode and a cathode; and
a structure comprising an electrically conductive material for electromechanically activating the organic light emitting device;
said structure forming a cantilever and being disposed to extend over the cathode of the organic light emitting device and to be spaced apart therefrom when said structure is in an unactuated state; and
said electrically conductive material of said structure in an actuated state making an electrical contact with an electrode of said organic light emitting device.
Specification