Method of manufacturing a patterned light emitting diode devices
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United States of America Patent
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Apr 16, 2002
Grant Date -
May 24, 2001
app pub date -
Jan 5, 2001
filing date -
Jun 10, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
An LED device that emits light in a pattern is disclosed. The LED device is a layer of active material that is sandwiched between a transparent substrate with an anode formed thereon and a cathode. The active material has a layer of light emitting material that emits light when electron/hole recombination is induced in the material. The patterned emission is defined by a patterned layer in the active material of the LED device. The patterned layer has at least a first thickness and a second thickness. When the device is on, the portion of the device associated with the first thickness of the patterned layer is visually distinct from the portion of the device that is associated with the second thickness of the patterned layer.
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