Bipolar electroluminescent device

H - Electricity – 05 – B

Patent

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Details

H05B 33/00 (2006.01) H05B 33/14 (2006.01) H05B 33/20 (2006.01) H05B 33/22 (2006.01) H05B 33/26 (2006.01)

Patent

CA 2215400

Light-emitting bipolar devices (10) consist of a light emitter (15) formed from an electroluminescent organic light-emitting material in contact with an insulating material. The light emitter (15) is in contact with two electrodes (12, 18) that are maintained in spaced-apart relation with each other. The light emitter (15) can be formed as an integral mixture of light-emitting materials and insulating materials or as separate layers of light-emitting and insulating materials. The devices operate with AC voltage (24) of less than twenty-four volts and in some instances at less than five volts. Under AC driving, the devices produce modulated light output that can be frequency or amplitude modulated. Under DC driving, the devices operate in both forward and reverse bias.

Dispositifs bipolaires électroluminescents (10) comprenant un émetteur de lumière (15) constitué d'un matériau photoémetteur électroluminescent organique au contact d'un matériau isolant. L'émetteur de lumière (15) est au contact de deux électrodes (12, 18) maintenues écartées l'une de l'autre. L'émetteur de lumière (15) peut être constitué d'un mélange intégral de matériaux luminescents et de matériaux isolants ou de couches distinctes de matériaux luminescents et de matériaux isolants. Le dispositif fonctionne avec un courant alternatif (24) de moins de 24 volts et, dans certains cas, de moins de 5 volts. Avec une excitation par courant alternatif, le dispositif produit une lumière modulée en fréquence ou en amplitude. Avec une excitation par courant continu, le dispositif fonctionne aussi bien sous polarisation directe qu'inverse.

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